Ford 5.4L 3v Triton Engine Melted the Intake Manifold: Let's Find Out Why!

In this video we tear down another 5.4L 3v engine to find out why the intake manifold melted causing a lean misifre.
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The information, demonstration and any content contained in this video is for informational purposes only. The user and BSG Automotive (hereinafter “FordTechMakuloco”) makes no warranty, express or implied, regarding the effectiveness or safety of the contents of this video. In no way should the contents of the video, including the tools used, be repeated or tried by anyone. Viewers should only seek the help of a trained professional located at a licensed auto repair shop for any fix, modification, alteration, or any change to their vehicle. FordTechMakuloco shall not be liable for any injury, damage, or loss to any person or property that may result from use of the tools, equipment, or any content contained in this video. In addition, there is no way to guarantee that the video is not altered or modified or is not in the final form submitted by FordTechMakuloco and therefore, FordTechMakuloco does not warrant that the video is unaltered or not modified. The links on this video to products are for informational purposes only and in no way are an endorsement of the safety or effectiveness of the particular product. Viewers understand that anything contained in this video or linked to or from this video is the sole responsibility of the viewer and in no way provides an express or implied warranty as to the safety or effectiveness of any linked tool, product, or video. Therefore, viewer agrees to release, waive, and discharge FordTechMakuloco or anyone affiliated with FordTechMakuloco, from any and all liability, claims, demands, actions, and causes of action whatsoever arising out of or related to any loss, damage, or injury, including death, that may be sustained by the viewer, or to any property belonging to viewer, regardless of whether the loss is linked to the use of the contents of this video, or otherwise and regardless of whether such liability arises in tort, contract, strict liability, or otherwise, to the fullest extent allowed by law.

[@jeremyferg271]

My 8 year old son just asked me why there isn't any thumbs down on this video. I replied it's because this channel and the people that watch it are awesome!

[@FordTechMakuloco]

Lol, that's awesome!

[@BuckingHorse-Bull]

tell him to check again. but it wasnt me

[@mikixP]

Ur kid dead wrong

[@jeremyferg271]

@@mikixP at the time he and I were spot-on.

[@kirbyyasha]

I don't even like newer Fords (Post 2000's) but I still love this channel. Not sure why it even has 24 downvotes (as of now).

[@mackgarrett]

As an aircraft mechanic the first thing that comes to my mind would be to question the owner to see if the vehicle went an extended period of time without being started. The valves that are open when the engine is not running are prone to corrosion on the clean face of the valve.

[@FordTechMakuloco]

Although I have never seen it I am sure it is possible.

[@BYENZER]

Engine storage tech tip. Before storing, disable fuel and ignition. Then spray engine FOGGER lube into the intake whilst cranking engine for 10 seconds. NO RUST will form inside the cylinders or open valve faces after doing this.

[@waynemorgan5733]

@@BYENZER most people who let a car set long time don't plan it in advance

[@kurtb3606]

@@FordTechMakuloco I let my truck(2006 5.4L) sit all winter as it only used in summer for towing..maybe I should start making sure to fog as I never did, sits Nov to Apr no start.

[@BYENZER]

@@john0270 HEAT THE SPRAY CAN HOT! So hot you can barely hold it. The FOGGER SPRAY WILL TRULY FOG.

[@babyjake6695]

Been a auto tech for 13 years and have never seen this. Thank you for the opportunity to learn.

[@gregjones8501]

We’re gonna know these engine inside and out literally as long as you continue to keep sharing with us your knowledge about these 3 valve engines and their problems. Thanks as always and we be looking forward to the next one!

[@HouseCallAutoRepair]

He already does. He rebuilds them in his sleep.

[@jaydewitte2958]

My 3v in two different vehicles haven't had 1 issue. Both over 200,000 2008 Expedition and 2010 F-150. The Expedition had the exhaust manifold replaced on the passenger side 6 years ago. I don't understand why the 5.4 3v has such a bad reputation 😕 😐...

[@dustin9035]

Would have liked a close-up of the valve seat

[@FordTechMakuloco]

Looked normal.

[@95turbostang21]

LOL there is your close up

[@dennisp.5053]

Chuck that valve into a valve facing machine and see how much runout it has. Also hit the seat with a cutter and see how it looks as well. That will tell the story.

[@norman_sage2528]

@@dennisp.5053 If that equipment was readily available....

[@GrayRaceCat]

@Dustin, I came hear to ask the same question.

[@bobbeaman807]

Great video as always. I am a Ford parts manager at a small dealership. Myself and one of our techs just finished watching this video. We watch quite a few of them.

[@chekelley6861]

I just did plugs on a 2003 2V 5.4. 264000 miles on original plugs and coils. Still running perfectly. There was so much dirt in the spark plug wells that it took multiple rounds with the air nozzle to even get a socket on some of the plugs. I replaced them with new Motorcraft plugs and coil boots and reused the coils. Freaking amazing. I kept the plugs and boots to show people. They were still in good shape. I did fix a couple vacuum leaks but the engine runs like a top!

[@Thumpr110]

I didn’t even know this could happen. This is why I love this channel so much

[@lattebudful]

Neven say never with a modern engine and drivetrain

[@robertprice5038]

I was wondering what the valve seat looks like too.

[@FordTechMakuloco]

looked normal

[@Mr81smc]

Probably the same

[@ryanphipps3393]

Brian, THANK YOU SO MUCH for your contribution to the Ford community!! I replaced phasers and timed my 2004 5.4 with your help and videos. I feel much more confident now. Just having someone that takes the time to explain the must know details helps a person willing to work with their hands build the confidence to do so. Keep up the great work!

[@richard1835]

I really appreciate you showing us how to work on the 5.4L Triton Engine.

[@a-a-ron2686]

This channel should be renamed '5.4 3 valve' 🤣

[@hondofourfivetwo9347]

I always love these forensic type tear down videos especially with odd ball engine issues like this 👍🏽

[@aaron6864]

Thank you for continuing to make these great videos. Sharing your time and knowledge is very generous.

[@johnriley7053]

Probably had to be driven a while with a flashing check engine and or noticeable missfire/ lack of power to melt the intake that bad.

[@shawnwalsh5430]

I previously worked for the state of Florida that had 100s of 5.4 3 valve engines in f150s and E250s. I witnessed the same problem One time on a prison perimeter truck that only shut off for gas and or service. Found one intake valve seat that was not fully seated on the head. Someone before my time had put reman heads on it and aftermarket timing set on it. You're right on track! Keep the content coming.

[@CrazyLegsFE]

I sold my 5.4 3v and I have to say I kinda miss working on it and learning so much about it thanks to you Bryan hope you were doing well.

[@timothycc711]

FORD mechanic with massive experience and skill. Thanks for your video Fordtechmakuloco!

[@codyt3685]

Wow. The motor world needs more folks like you. Keep doing what you're doing!

[@martinlandaverde403]

Thank you for taking the time and sharing your knowledge,watching your videos were so help full in repairing my Ford E-350 5.3(heads remove,new head gaskets, rectify heads,new intake,new timing kit,new oil pump,new exhaust manifolds,THANK YOU.

[@ronaldsinclair6837]

Another great job. That's the difference between just throwing parts at a problem and repairing a problem.

[@robertwhite8599]

I’ve seen vehicles where people wash their engines and the o-rings on the injectors are junk. Eventually you see what we see here today.

[@cap2c484]

I guess somehow moisture got trapped on that particular valve seating surface and sat for a long enough period of time to cause that corrosion/pitting. Interesting breakdown/analysis. I guess we'll never know for sure.

[@05milmachine90]

That was my guess. Maybe it sat for a few years with that valve open in a moist environment? Lincolns tend to sit around more than their Ford siblings.

[@ericgertiser6522]

He did say that the o ring on that injector was twisted/messed up. And another commenter mentioned seeing bad injector o rings allow water to get in. Being in the north I wonder if salt water from the road found it’s way to the top of that valve. Seems like it would take a long time to cause that much damage from water alone.

[@South_0f_Heaven_]

That’s not why the seat is pitted, lean mixture burns up the valve seats. Vacuum leak causes lean mixture. Moisture lmao. I rebuilt heads for a living so seen a lot of this.

[@Mr81smc]

When I first seen one of your video I knew you knew your stuff. I subscribed immediately. I went to school for Harley Davidson Years ago. Very few mechanics/technicians can really diagnose the problem.

[@YouCanSucceed365]

You’re videos are just excellent, I am young and really enjoy learning, thank you for being a good teacher 👍

[@pascalgibeault2880]

Seen this beffore on engine parked for a while and engine was stopped with those valves open on that cylinder.

[@clintonhayes670]

Thank's for the tear down and inspection well done.

[@midnightrunner684]

M.A.G.A

[@smallchunkaground2071]

We had this same issue on the opposite bank with one of our e250 vans where I work. Only the engine had 300 plus thousand miles on it. It actually melted a hole completely through the intake. They scrapped the engine before I had a chance to see what happened to it. Thanks for the video and detailed camera work on the valves on what possibly happened to ours.

[@tonymcclendon-hobbytime7727]

Good info you shared, thanks a million. I have the same engine in my f150 lariat, 190000 miles on it. Still going strong. It does go months without being started , but , no issues as this in the video. Never fogged it before starting. Maybe I should after seeing this video.

[@jimmacintosh3564]

You should have an Q and A sometime. I got the 5.4 3 v. Would love to hear your input on.

[@aspenyukon6845]

Best engine ever..-12f my 04 300k mi 5.4 3v idled 13hrs overnight. 15w40 8qrts.Original everything. Replaced: belt,pulleys,E3 plugs, alt, battery. Polar vortex update: 300k mi F150 has been running/Driving/idling for a week straight -12f no issues.

[@AbcAbc-sp1od]

Awesome man! I got 286k on my 05 5.4! Still running, and I hope to break 300k, knock on wood lol!

[@aspenyukon6845]

5.4 3v has no issues ever. Original starter, coolant,exhaust,ignition coils,fuel system,water pump, power steering pump, trans fluid.

[@zoots15]

@@aspenyukon6845 how long have you been running 15w40? No problems at startup/warmup in -12f?

[@aspenyukon6845]

Any temperature below 0 degrees i leave it running because the battery can't handle the cold.

[@zoots15]

@@aspenyukon6845 Really? I live in Canada and go below zero quite often in winter. No block heater? Anyway my concern is more about the 15w40. No issues running that thick? How long have you been doing it? I'm thinking of running something thicker in summer and switching to something a bit lighter in winter. Cheers!

[@jaydewitte2958]

I disagree with you about "150,000 time for a new engine." I have the same 5.4 with 230,000 and not one issue (knock on wood). However, watching your videos I am scared about my transmission cooler lines. Do you think I am lucky or it just doesn't happen with all of them? Tysm for all your videos. My son and I do all our own work because of you. So you have saved us many times!

[@charlesabbott9605]

Didn't you say another shop replaced the coil and spark plug? That may explain why that plug looks so clean relative to the bad cylinder. I absolutly love your videos. Clean, concise and the amount of effort put into diagnosing and the production value is second to none! I just wish your shop was near my house!

[@MotorCityMechanic]

I have seen them melt the lower intakes into the head ports on the 3.6 when they started over heating and just kept driving and driving until it cut off.....permanently!

[@volvo09]

You know it got HOT when that happens. When the timing belt covers melt on other engines you know to not even waste your time on the engine :)

[@FordTechMakuloco]

Oh wow!

[@thetinpin]

Hot damn!

[@GrayRaceCat]

@@volvo09 Yeah! Melted Volvo 4, 5, & 6 cylinder timing covers & Ignition coil covers, never a good sign.

[@robinsattahip2376]

People who do that deserve an $8000 bill for stupidity.

[@0727Mtl]

I Love nerding out to your videos! Good stuff. How many miles were on that engine?

[@0727Mtl]

150k, heard it at the end

[@N1RKW]

This is a well presented inspection of an unusual engine problem, thank you!

[@richard1835]

That is amazing. Melted Intake Manifold. Great KZbin channel for Ford Technology and Repairs. Thank you

[@adotintheshark4848]

The pitting could be caused by red-hot carbon particles contacting the valve face momentarily, being mashed into the surface and leaving pits. It happens on various engines, more than you expect. How were the seats?

[@johndaffron2009]

Being aluminum heads , the seats should be much worse ...

[@johndaffron2009]

My guess is impurities in the steel .

[@andretigiovaneti7587]

Thanks for sharing .

[@joe-g1749]

Excellent informational video. Several have said it before, but that problem was caused by the valve being off the seat while it a corrosive environment. It is likely ethanol-related as ethanol is hygroscopic. Likely the engine was sitting too long without starting it OR it sat outside and was not driven enough each time to keep the moisture burned off. Most engines stop in random positions when shut off and then some tend to stop in almost the same position every time which would leave cyl 6 valves off their seats way too often causing excess corrosion/pitting. The was/is something unique about that engine. Or it could be simply a materials defect in the valve face. I would vote for the specific engine stop position idea since both intake valves showed corrosion.

[@garymcmullin2292]

Great video and thank you again for sharing your skills and knowledge. I am surprised that level of valve damage caused the melted plastic. I mean the valve sealed except for that dribble of water. No big gaps cause by broken or warped valves so the amount of exhaust blow back was not that high. It leads me to speculate that the lean condition of that cylinder caused by the damaged o-ring caused high temperature erosion of that valve. Probably something to do with the mechanics of the air flow as to why the other intake valve was not similarly damaged. In essence the ultra lean condition led to the high temps and melting and that in turn led to the metal damage on the valve.

[@TechTimeWithEric]

I've replaced a lot of Ford 5.4L for a lot of different problems, but never seen this happen.

[@GIGABACHI]

Saw the same happen on a 5.7L HEMI. Things got toasty. 💀🤣 Thanks for the vid, you're awesome.😎👍

[@1biggun712]

Superb mechanic to look at the actual details of the engine. My 2001 Ford E150 5.4 is having some issues @ 178,000 miles, really too many to list. Keep on keeping on 👍👍😁 BIGGUN

[@stevea3936]

Very informative. I had multiple cat and spark plug issues when I owned a 2007 F150 with the 5.4 after 100k miles.

[@thomasgieseler6750]

I think a lot of the5.4 engs had bad dpark plug days ya know where they just s spit thev plug or plugs out where ever they felt like it

[@BeerkegGarage]

Thx for the upload

[@jeffpurtell5676]

I remember how surprised I was to find out the intake manifold in my 2003 Ford Crown Vic was plastic. (It has failed of course, once at least...) Shock might be a better description. Of all the parts in a motor vehicle that you DON'T want to save weight and money by using plastic, it would be on the engine. This is engineering by bean counters. Which isn't really engineering at all.

[@xder345]

4.6 modular. Yup. Just did the cracked manifold thing on the mustang. Growl.

[@jeffpurtell5676]

@@xder345 I really like my Crown Vic. But this is the second issue that I really believe warrants a full recall by Ford. They did recall the cars for the headlight failure issue. This plastic intake manifold issue deserves the same response.

[@nerd1000ify]

Plastic manifolds are pretty standard these days, even on turbocharged engines. They're cheaper than metal of course, but they also have lower weight, better sound deadening and better flow (due to smoother surfaces) compared to a cast metal manifold. The price is that there is a lot less room for error in designing them. Back in the '90s they weren't so good at it. Plastics technology has improved a bit since then as well.

[@jeffpurtell5676]

@@nerd1000ify I understand all the pros. It just seems that from the standpoint of the consumer, all those pros favor the manufacturer by the largest margin, and the consumer gets the largest share of the cons. And I feel a little conned. They would have to be better at making these plastic engine parts, I don't see how they could have been worse than the design on my car. Here's hoping you are right!

[@gregrobsn]

I think the thing to remember is this isn't styrene plastic like a model airplane. It a polycarbonate material like the stuff they've been making security containers out of for years. It doesn't warp and is very strong under high pressure conditions. I know Ford been using it for years. So does Volkswagen /Audi. The big question is how does it hold up after 20 years or so?

[@mikechiodetti4482]

I saw a a burned manifold like that from a 2005 Expedition with the 5.4L 3 valve engine that had the Intake Manifold Runner Control or IMRC. Of course codes were set when I got it after the new engine was installed and the engine was running with a definite lack of power. The original engine had a "stuck open" intake valve, so I was told, and it had been brought back to the dealer before I saw it. Great learning curve with the IMRC system and once I got it straightened out, it ran great. That IMRC was a real "kick-in-the-ass" when it worked correctly! Thank God we had the Ford IDS that was a GREAT help! Especially with "outa-the-box-testing!"

[@rdecoster1]

First time watching. Very impressed!! Nice to watch a smart mechanic work. The pits in valve seat sure are weird!! Read other comments that asked about sitting idle for long periods. Would think more than 2 would be affected.??? Weird problems are hard to figure out.

[@fawaz200]

something went inside that cylinder through the spark plug hole , maybe sand or small rocks thanks Brian for the tear down

[@robbanta2979]

broken plugs residue from the infamous 3v plugs?

[@JimBronson]

@@robbanta2979 they changed the design in 2009, wouldn't have applied to this engine.

[@brianmcmillian2010]

As thorough as you are in your videos I would not be afraid to buy a Ford 5.4 3 valve

[@JimBronson]

I did exactly that. 2010 Navigator, had it about 6 months. I looked at some GMs of a similar vintage and the interiors are terrible, fall apart bad. Easy decision.

[@cleenlivin]

I had the same thinking. I couldn't afford a new $60K+ SUV and settled on a Tahoe or Expedition. Most of the Tahoe's had high mileage which says it's probably a better long term runner. However, the rattles and high mileage turned me off. I settled on a used 2011 Expedition with a great interior and about 70k miles. So far, aside from changng all the fluids and switching out the blown Monroe front struts it's serving me well for long trips.

[@andystreets4660]

Great video! I enjoyed the deep inspection that you went through with this one. I had a 5.4 2v come in a couple of months ago that had a tuliped intake valve. In may case the valve problem was due to a messed up spark plug thread (2 valve problems) that was letting air into the chamber forcing that cylinder lean and hot. I know that this is not what happened to your 5.4, but I thought I would share a similar situation.

[@JRobert111111]

Wow! Great investigative skills! Thank you for a very informative video!

[@jeremyhanna3852]

I seen a drippy injector on a ls do something similar way to much fuel fire back into the intake

[@jamram9924]

From this angle, thats a well maintained and nice looking Navigator! Plastic engine parts.....🤦🏻‍♂️

[@automotivedefenz2195]

At a shop where I used to work we would have to check valve leaks with fuel instead of water. We were looking for a tight seal, absolutely no pitting on the valve's nor on the head valve seat. We had some heads come back from the machine shop that failed the test and we would return them or seat the valve's ourselves until they were spot clean and passed the fuel leak test or water test. I've seen so many different types of scenarios from either cheap fuel, cheap oils, lack of maintenance, low quality workmanship, or just simple check engine light neglect that manifests into weird catastrophic engine failures. Good luck with your shop.

[@465maltbie]

Thanks for showing that, good information to know. Charles

[@piercesteadys6601]

Totally awesome video!!! Extremely professional details!!! When the valves were being inspected, I was able to see all the details of the valve, the pitting, the crevices, the glove details,& even his well manicured finger nails. If I could, I would of given a hundred likes to off set the 97 dislikes from the haters. ( jealous idiots) .

[@franka2507]

Great video! How was the valve spring, tension wise ?

[@chadchiasson7768]

I was thinking weak springs as well

[@FordTechMakuloco]

I don't have a spring tension tester but they were fine otherwise.

[@johndouglass3691]

Really appreciate you sharing your knowledge. Thanks!

[@awesumenergy]

I have a 5.4 3v Triton in an '03 F150 with 357K km(165K miles) on it. At 350k it had a problem with intermittent overheating. I was told by 2 separate shops that the head gasket was likely blown and would need to be replaced for $3800. Watched a few of your videos and thought "I DON'T THINK SO!" I replaced the T-stat with a new 180degree, put in all new coolant and dumped in some of that 'gasket in a can' schpoo for good measure. It's has run perfectly fine ever since! By the way, it was -40 degrees celsius this morning. So cold the knobs on the radio would hardly move. Had the block heater plugged in and she fired up right away. Thanks for all the info!

[@jameswasher3938]

2003 3V? That doesn't sound right. They didn't come out until 2004 iirc. Brian?

[@stephenmoxley3004]

Great video, Brian. I always enjoy your case study videos. It makes me wonder if the valves were originally of poor quality steel or the valve spring pressure was too weak to keep the valve face clean? This also makes we wonder if there would be any different symptoms, had the intake manifold been made of aluminum? As always, keep up the great work.

[@dicktomasko1553]

I've heard of those engines going 300k miles...150k is way too early. I'm betting faulty part during assembly..valve spring/valve etc. or maybe chemical problem of some sort..

[@V10PDTDI]

Great job there Brian the only thing missing from this perfect analysis is I was hoping that you would’ve put your smoke machine on the leaking cylinder it’s more of a visual test especially with the camera I tried this a few times and it worked great plus you can look at the gauge and see and compare all the cylinders on left bank and witch one is leaking the most it’s pretty rare to get pitted intake valve I wonder if it was bad batch of valve or seats or weak valve springs any way good job.

[@LunaDaSavage]

I had one with the same issue come a couple of months ago completely melted intake runner, it had broken and droped an intake valve. Previous shop did a timing chain and didn't fix the issue. They kept it for months and finally told him they couldn't figure it out. Didn't refund the customer either... I did a compression test and found the cylinder with no compression in minutes. Dropped a crate engine on it and the owner was happy about finally having his truck back.

[@bfrproductions7570]

What does the valve seat on the head look like?

[@FordTechMakuloco]

I should have mentioned it. When I removed the valve I did check the valve seat for looseness and overall finish for even wear and found no problems at all as expected.

[@cruisepix]

@@FordTechMakuloco no cracked seat?

[@South_0f_Heaven_]

@@cruisepix seats don’t crack on mod motors.

[@karpenterken1]

@@South_0f_Heaven_ Explain that ridiculous statement.

[@South_0f_Heaven_]

@@karpenterken1 aluminum heads have pressed in seat inserts. They don’t crack.

[@charlesbradshaw8673]

The tip of the original injector, broke off and went through the valves. That's my best guess.

[@norman_sage2528]

Dude, you are a genius

[@DustyRandall]

Im supposed to be picking up a 5.4 with a f250 conected to it tommorow cant wait to bullet proof it via your kit and videos 😃

[@christinepanek4260]

Good teacher. Thanks for doing these.

[@cma8165]

Hey Brian, I hope you don't mind me asking, but could you tell us, your viewers, how much your customer had to spend for the "new" engine?

[@mikixP]

4500$

[@FordTechMakuloco]

Standard pricing is $6,700 plus the intake of course.

[@CarguyEd5150]

@@FordTechMakuloco the customer made the right call in replacing the engine and new intake and why chase good money after bad?

[@JimmyMakingitwork]

@@FordTechMakuloco wow, your dealership is cheaper than our indy shop, lol.

[@erniecamp6945]

@@FordTechMakuloco Wow he could have bought a decent "hot rod " engine for that much.

[@84gssteve]

Uhg! Even when you do everything right for the engine, it still is determined to find a way to fail! Just saying, "5.4 3-valve" sounds like a countdown to something blowing up!

[@FordTechMakuloco]

lol that's a good one.

[@bdo9114]

Wow you learn something new every day!

[@mikeaho4143]

Thanks for sharing Brian. Very interesting case study.. Pretty bad pitting though.

[@drinxenscub]

leak-down test in the beginning of the diagnosis, oh yeah

[@PeeterPuncher]

Just when you think you have seen it all with these 3V's....a new one comes in. Even with good maintenence this one happened out of your control. This just adds another nail into the coffin for me never owning anything with a 3-valve in it.

[@FishFind3000]

I had the 3 valve till it was totaled. It’s an ok engine. But the 3.5l ecoboost that replaced it with way fucking better. It actually has power to get out of its own way. It goes from driving a lazy truck to a car.

[@AbcAbc-sp1od]

@@FishFind3000 wait till the turbos go out or the water pump fails. Then you won't think the ecoboost is so great lol.

[@2003mitchdog]

Brian, Thanks again for another informative vid! You're awesome man. Used your timing job series to do a complete timing on my 2006 f150. Followed your instructions religiously. Truck runs way better than when I bought it, but still something just isn't right. Rpms fluctuate a little while coming to a stop. Not enough to stall, but noticeable. Any thoughts or suggestions? No error codes, been doing this since I did the timing job back in November. So far it's been getting me from point a to b with no problems

[@elmaschingon8237]

5.4l pro!!!!! I need a friend like him for my Ford. Great job man

[@dr7477]

Please ask the customer if he parked the vehicle for an extended period of time and do a follow up to let us know. I think that's the best theory going right now.

[@mikespeck8642]

I agree, probably parked for a period and collected moisture in #6

[@bigbobno11]

Yopper i had that happen. Dropped a valve. Exhaust

[@stevel6337]

Very informative video, thanks! Do your videos on the 5.4-3V also apply on the 4.6-3V in Explorers, including similar potential issues and repair tips such as timing chain tensioner replacements?

[@mikem6204]

I noticed the oil dipstick tube is broken off too. Same as our 2010 Expedition, that I'll be tackling this weekend.

[@wakingstream]

Could it be a hair line crack on the serface between the intake and exhaust valve .

[@richl1949]

Any pitting on the seats?

[@TFFTR1]

What’s the chance that debris from a spark plug change dropped into the cylinder and compromised the valve?

[@JRobert111111]

That's a great question! I'd like to hear his answer to this one as well.

[@sophiamountain9966]

This engine does not use those cheap plugs that break when you change them. More threads on upgraded ones. 10:25

[@JRobert111111]

@@sophiamountain9966 That wasn't Bill Norris' question. It was whether or not some debris such as dirt, etc. fell into the hole during a spark plug change; not broken pieces of spark plug as you're referring to.

[@subcummins0134]

I don't think so. The pitting was on the seat side. Not the combustion chamber side. Someone else mentioned probably water found it's way in there from sitting. The oring was twisted on the injector so it's possible.

[@MitzvosGolem1]

Alot on these motors..water also. Bad design engine . They are being sued for these engines are so bad...

[@gordon295]

Well done !! Love all your videos ... Very informative.

[@bthompson1767]

Thanks Brian

[@seeya205]

This is a good reason not to have plastic engine parts.

[@seeya205]

@@raisethecolours It's cheap, light, which lowers the gas mileage and it lasts past the warranty period. I don't think they will ever go back.

[@hornpub6937]

Imagine if it was metal and it just detonates the motor cuz it has no where to go. (Weak spot)

[@seeya205]

@@hornpub6937 The gasket would fail.

[@hornpub6937]

@@seeya205 wait so the gasket is stronger than that plastic? Hahaha

[@mercury0214]

@@raisethecolours not really why would I want a garbage heavy ass metal intake that gets heat soaked after one pull? The future is now old man!

[@alb12345672]

You really have to be careful when you buy a 5.4L 3V. The truck is usually so nice but beware!

[@john7017]

I passed up a few beauties in my area, saw that they were 3 valve and ran from them. I have 4 - 2 valve Triton vans with over 200k on them and only repaired 1 blown out spark plug and still running fine...

[@j.r.8133]

@@john7017 I feel ya. Sometimes I wish my 2v wasn't as anemic as it is, but I don't think I would trade the bump in power for all the other problems the 3v has. Coming up on 300k with my 01 F150....haven't had a single spark plug blow out. Broken exhaust studs on the passenger side are another story though....

[@anthonys7534]

These engines are not that bad, I know of several over 200,000 with minimal issues. Mostly issues with oil and filter neglect. I know they could use an upgraded oil pump and a few other misc parts. I trust mine with 155000 miles, a couple months ago I drove 2000 mile round trip to pick up a 5500lb boat, not a single issue.I trust these engines when cared for.

[@JimBronson]

Seeing the videos on this channel made me like I could take on a 5.4 3V. Have a 2010 Navigator. Wanted to get a GM SUV originally but the interiors are junk. I decided I'd rather live with the questionable motor than crap interior.

[@NY411Info]

@@JimBronson Keep the oil and filter changed and it will take care of you.

[@YuuAuto]

this was a interesting video. thanks for sharing!

[@dcfgarage]

Thanks for the video!

[@RonHaslam2001]

4 thumbs down so far, probably the mechanics that couldn’t find out the problem 🤣

[@ahkyajh214]

material defect....wow

[@NovaNinja_]

Since both intake valves are shot on a single cylinder it's probably not a material defect. Something else had to have caused it. Whatever it was I don't know...

[@jeffryblackmon4846]

Thanks, I've learned something this morning.

[@THEMOWERMEDIC1]

Love a good Mystery! Carnage to boot!

[@armory3379]

It’s look like a bad valve inspection from installation when Ford build this engine and this test can be reverse on top of those valve.

[@armory3379]

I just want to say thank’s because there are so many KZbin channel here, and if people have a troubleshooting Direction about those Ford’s , people can today fix this problem with a Ford Spécialiste for troubleshooting just right here, and this is very cool.

[@derekcullipher6576]

What about the porcelain breaking and beating around in the cylinder from a previous spark plug?

[@sophiamountain9966]

This engine does not use those cheaply made plugs. I think they stopped using them around 2008. Newer plugs have more threads. 10:25

[@derekcullipher6576]

@@sophiamountain9966 I’ve pulled many spark plugs out of the 3v 5.4 and they’re the only plug to break off and stay stuck in the cylinder head. They make a tool just for them.

[@sophiamountain9966]

@@derekcullipher6576 Yes ,you are correct but Ford upgraded the heads to use different plugs that don't break like the older ones. You can see the difference in the new plug at 10:25 and the old plug in FordTechMakuloco's video on removing broken spark plugs. The engine he is working on in the above video is a 2012. It does not have those cheap plugs that get stuck so easily and break off in the head.

[@mccormicklucas451]

Awesome video. Amazing something so small caused a big issue.

[@bryansanford]

You are Amazing thanks for your input and pro diag for this 5.4l v8 head

[@mikemoyercell]

that scalloped valve cover reminds me of a poly chrysler engine

[@bondo1955]

Did you mention the mileage on that ?

[@6foot7dad]

150k

[@-DC-]

What a strange failure great content as usual 👍

[@dginia]

In 2009 I had burned intake valves on a 2002 Chrysler 3.3. It became apparently abruptly, going form a nice idle while at a traffic light one second to galloping and barely running the next. Diagnosis was a pinhole air leak in intake manifold gasket causing lean running on the two cylinders sharing that plenum in the manifold. I had recently had the best tank of fuel mileage ever, 35 mpg as opposed to 24 mpg. I was pleased! Now I know to be careful what I wish for. When my mileage started to go up again in 2015, I traded it!