How to Diagnose Bent Engine Valves, the Easy Way

This is the easy way to find valve damage in a motor

[@user-dg2rg2sc4r]

Brother I've searched and searched, finally right before I was ready to chuck this damn phone over the him and hurt grab a beer and say fook it, I found your video!!!!! Thanks a million 💪💪👊

[@patricklangdon9129]

This helped me a ton! Thank you so much for sharing. Now I can tell without pulling my heads off! Hats off to you guy!

[@bentonrodeheaver2596]

Here's one I'm trying. Tape a string to one of those mini led flashlights and lower it into the plug tubes. This after removing the intake/exhaust manifolds. Then look through the ports for traces of light..if you see some the valve is bent.

[@TheOnly1Ever]

Thank you for sharing this video. Even though this is a different motor to mine its very similar in how its built. I've got the 6A12tt and this is the only video ive found that remotely resembles my motor :) thanks again!

[@crazysexycool180]

same principle

[@Rusty_trombone62]

Please read if you’re a new owner or are in the market for a 3000gt or dodge Stealth. It’s very important!!!!!! Omg I’m still in love with my 1992 Mitsubishi 3000gt Vr4 that I bought brand new when I was a senior in high school. I will never part with my vr4. But this op is sooo right about taking care of the timing belt and tensioner on all of the DOHC 3000gt and dodge Stealth engines. Both turbo and natural aspiration engines are interference engines and if you do not maintain your timing belt, water pump, tensioner adjuster, tensioner pulley, and idler pulley with ONLY GENUINE MITSUBISHI OEM DEALER PARTS your engine will jump time and the pistons will ram 🐏 not the valves bending them. My timing belt was defective from the factory and broke 250 miles into owning my car and both heads were replaced under the warranty. But I couldn’t agree more with the op. If your belt breaks or jumps time more then 3 teeth on the cam gears then you definitely have bent valves. Even if you replace all the timing components and the car starts up. It’s gunna run rough no matter what you do. And it’s also now a ticking time bomb for further and catastrophic engine damage because now those bent valves are not seating correctly and destroy/crack the heads around the valve seats. In addition That valve is now weak and runs the risk of the Bell breaking off and literally tearing apart that cylinder. I’ve been a 3/s mechanic for years now because after my 3 year warranty ran out I taught myself how to work on these cars. And now it’s help other 3/s owners with their cars. The only exception to this are the 3rd gen non turbo 3000gt base and all Dodge Stealth base models that came with the SOHC engine. If your timing belt snaps off of jumps time you can just slap a new belt on and no harm no foul. But in my 27 years of owning my vr4 I learned 2 things 1) NEVER NEVER IGNORE THAT TIMING BELT. Pull the cover off every 3000 miles and look at it. (Don’t let the bolt collar from the upper cover fall into that timing compartment). Check it for cracks and tension). If you just bought the car and the owner can’t show you proof of when the timing belt was replaced then replace it yourself. Spent the $900 bucks because it will save you the 7 grand a rebuild will cost you. Because now 25+ years later if your timing jumps chances are your pistons are gunna crack from the contact with the valves. So it will be a full rebuild (I’ve even seen the pistons striking the valves damage the rod bearing on one engine I did). So please don’t sleep on that timing belt of the tensioner. And never never use anything but genuine Mitsubishi timing components (unless you are building a stage 2 racing engine. Then you would go with the Gates Kevlar racing belt. But for regular driving it’s not necessary). 2) look under your car at the oil pan and chances are there will be a dent in the circular out dent of the oil pan. This comes from mechanic shops that don’t know how to work on these cars and while changing the timing belt they will place the Jack right under the oil pan to raise the engine up to remove and install the drivers side engine mount. This is literally a grenade with a pin pulled out. Because there is literally 2-3 millimeters of clearance between the oil pick up for the engine and the bottom of the oil pan. The engine will function normally under normal driving but the minute you either go into boost or put a load on the engine it’s being starved of oil and just wiping all the meat off the main and rod bearings. This is a true emergency. Don’t buy this car unless it’s dirt Cheap. And if you see this dent in your oil pan don’t drive it at all anymore until you remove that oil pan and hammer out the dent. All you need to do is on a non turbo model is remove the exhaust down pipe, starter, the 20 oil pan bolts and carefully remove the oil pan. Hammer out the dent, inspect the oil pickup for damage. Clean everything since you already have it off. Clean it good. Apply a thin coat or RTV sealant and bolt it back up in sequence and re install the starter and down pipe. For the vr4 and stealth twin Turbo cars there are a few more steps. Remove the down pipe, starter, and in addition you will need to remove the turbo oil drain lines where they bolt onto the oil pan And replace the gaskets which are very cheap, and remove the transfer case. When you remove it you can just gently lay it on the clean floor but I recommend checking to make sure it isn’t leaking because there was a recall years ago with the transfer case leaking and locking up without warning at high speeds. So give it a good once over. But other then that the oil pan is the same as the other one. Please please take everything that I’m telling you seriously. Most of you already know this. But this post is for the new owner of a Stealth or 3000gt or someone who is new to this platform and is considering buying one. My opinion save up for either the 3000gt vr4 model or the Dodge StealthRT/TT twin turbo.

[@crazysexycool180]

Thank you please like, share, and subscribe, also please check out my other channel Salem Taxi, on KZbin for more material on a different level.

[@donc6545]

Awesome video. Thanks

[@diycast6914]

How about using a borescope through the spark plug holes to diagnos bent valves by visualizing if the close completely flush? I saw a few videos on this and tried it myself, but couldn't see the valves no matter how much i tried twisting or adjusting the borescope

[@dubbsackss20]

How did you push the valves down?

[@davidk6271]

Thanks for this. So you cant straighten a valve stem yourself? Better to fit new? Cheers

[@radianm6]

Now if you're checking like this but can't tell if its bent is it still possible its bent? New coils,plus, injectors, and no compression

[@koreymayo8884]

You shouldve also looked inside each spark plug well with a boroscope to see if the tops of any pistons were damged from hitting valves.

[@diycast6914]

Is this possible to do on any engine? I tried doing it in a DOHC 3.0L V6 and couldn't see anything with the brand new borescope I bought

[@edardon2699]

hi artistry photography, i got a cuestion and i hope you can help me,few day ago i was tryn to remove the cranshaft bolt,and using the method of a long breaker bar supported on the chassis and using the ignition key to loose that bolt.now i have a problem the crankshaft wont turn 180 degrees counter wise or counterclock wise,the car is a 4 runner 99 with a no iterference engine and was running perfect before my intent of replace the timing belt,thanks in advance and i hope you understand my english... 🤔🤔🤔bent valves or i misaligned the timing.

[@wfijvddjjklngfdgh1747]

If the bolt came out with out a problem then you might have installed something the wrong way.

[@miriamvivo4279]

1995 honda odyssey timi g belt broke on hwy towed home.now troubeshooting for engine damage.tryi g to put all tdc if able too. Checking for options on engine damage assessment on the web.may use your method thanks

[@kirbytabor9956]

What was the diagnosis? Bent valves for sure 👍

[@ryanregister495]

That valvetrain just bottled my pushrod brain, but it verified my problem lmao

[@subramanyamsarvepalli5294]

Good job.

[@crazysexycool180]

Many many thanks

[@alexquinones6009]

Yes looking at the intake manifold will show you also because the valves that don't close so ugly exhaust gases burn it , look at a turbo see how one side is shiny and one is burnt intake exhaust

[@bendude6748]

Hey, I have an engine that the belt broke on, the valves have definitely hit the pistons but I'm looking at the valves after removing the head and they really don't look bent at all, can they still lose all compression if they're bent just a tiny bit? I have one cylinder with zero compression I was just kinda expecting an obviously bent valve but it all looks ok to the eye.

[@crazysexycool180]

remove the valve, also make sure the spring is good.

[@Juaiv]

How much did everything cost in labor and parts to fix something like this ?

[@SaeedKhan-gs7qt]

Too Much price It's better to bring new

[@KingKing-rz6wp]

How to do it with the timing belt on.or can you?

[@deltafox8795]

What if your timing belt breaks at idle ?

[@cmdesignstudios8741]

love the vid

[@tajhealthnature8570]

Hi a.. want to know how do you.. Align the cam with the crankshaft please let me know..

[@ezrahcultshit2581]

With the timing notches on your crankshaft and cams and motor

[@trackrunner11]

We know that the valves hit the piston therefore they are bent. So put the camera down there in each cylinder and look at the piston or the valves for nicks. They will show as shiny indentations.

[@crazysexycool180]

no need for all that the valves are softer then the pistons an indention on the piston is no big deal but the bent valve will cause low or no compression

[@llennon73]

If you remove a head then YOU can replace valves. You don't need to pay. Get a valve tool for your vehicle and do it.

[@crazysexycool180]

yes i can but i send them off because at the machine shop they will service the valve seats and the valve guides. then reset to the proper angle, also grinding of the valves if needed.

[@kirbytabor9956]

I had a timing belt break, compression test showed 1&2 were low so i pulled head, replaced all the valves, used valve grinding compound, put it together and runs like new only cost me $300 in parts👍👍👍

[@joblessalex]

I just had a belt pop on me and I threw a new belt on and it runs just fine. Got lucky and had it happen high load at idle.

[@jibb16]

Do you know anything about the Audi’s? I have a 2005 Audi A6 Quattro 4.2 and I think that’s what happened to it but I don’t know much about them but I heard it has like 40 valves in the 4.2 engine any info would be amazing! Thank you

[@closertothetruth9209]

Not a bad way to visually check things, a bore scope could probably do it too in some engines

[@crazysexycool180]

Thank you, please like, share, and subscribe, also check out my other channel Salem Taxi on KZbin

[@coreygoodwin2174]

Will ur engine still run if u have a bent valve im working on a 2003 Mitsubishi eclipse GTS V6

[@crazysexycool180]

depends how bad its bent and how many, and if it can still seal the cylinder Thanks for watching , please like, share, and subscribe

Do timing chains break also? I heard somebody say if you change the oil frequently that prevents breakage. This sounded like a expensive damage repair. What is your secondary channel again?? Taxi something.

[@Raevenswood]

Timing chains can break but they usually last 200-250k and will show signs of wear before breaking. A lot of the time timing chains are used on interference engines because they are more reliable than a belt. Having a belt driven interference engine kind of sucks for the very reason we see in this video.

@Sam S its a 1999 ford taurus. Its a slight rattle when i accelerate. I thought it might be the CAT crumbling and i checked the timing chain and it had some slack but looked fine. So im not sure where to start.

@Sam S yes. I burn oil . about a quart and i did my last oil change 2 months ago. 3/4ths oil is in crankcase

[@wfijvddjjklngfdgh1747]

You can also do a cylinder compression or leak down test . Or use a bore scope .

[@holyman7820]

what about hyundai sonata 2.7 v6. thanks for your video

[@crazysexycool180]

Thank you please like, share, and subscribe, also please check out my other channel Salem Taxi, on KZbin for more material on a different level.

[@elilopez2517]

How would i check the exhaust valves?

[@koreymayo8884]

Remove the exhaust manifolds

[@crazysexycool180]

Thank you please like, share, and subscribe, also please check out my other channel Salem Taxi, on KZbin for more material on a different level.

[@tonyla8189]

Thanks for video , good video to check the intake valve side , what about exhaust valve if it bend , and how ????

[@eliauld6788]

Same thing

[@SmudgyContent]

5:38 HA! HA!

[@TruongLe-eo8kh]

With bent valves. Is it harder to turn engine by hand because of low compression. Engine is hard to turn at some point with binding too

[@osmannabiyev7587]

With low compression. The Engine should rotate easier actually. Because it’s coming up on the compression stroke. Well there is barely any compression if you understand.

[@joygayle7483]

What causes the valves to bend?

[@crazysexycool180]

bad timing

[@E5mma_combat]

Good shit

[@teresabrewster7513]

If I replaced the Timing chain and Valve solenoids put it all back together and then realized I have bent valves, can I still drive it for a bit?

[@elivan1700]

Teresa Brewster I may not run at all

[@AngelRodriguez-jv6oc]

Did it work lol??? Same issue

[@murrieteacher]

Also do the guides.

[@toma43]

Take the heads to a machine shop? What if you are trying to do this on a budget in your garage or farm shop? Can't we just order new valves and lap them in?

[@MiKa-fu2wi]

check the head surface (the one that mates with the block) with a metal straight edge in all directions. If it is straight you don't need to machine the head...if it is uneven that means the head is warped and needs to be machined. There are videos on YT that show how to resurface it yourself with a glass table and sand paper. check out 'oldskool funk'

[@elivan1700]

Tom Armstrong yes you can

[@AllanJ1981]

Mkay......

[@ezrahcultshit2581]

Holy shit you can see the bend I that valve n bro I been debating with a friend bout the manifold ,plenun shit for ages haha

[@crazysexycool180]

Thank you please like, share, and subscribe, also please check out my other channel Salem Taxi, on KZbin for more material on a different level.

[@mistamistavtx6399]

i got a f150 dont know

[@CornPopsDood]

Does it apply over if you’ve got a chain instead? 07 Ford Freestyle AWD that sounds like fucking machine gun when it’s running. No power what so ever. Sounds like everything moving wants to come flying out. First Ford I ever bought, didn’t wanna buy it, but wife loved the car. Never buying another.

[@Haithamsaadany]

It's easy to observe a bent valve after removing the intake manifold, but, How can I know that I have a bent valve while I am operating the engine ?

[@crazysexycool180]

how is it running?

[@Haithamsaadany]

Thank you for reply, let me run the engine and tell you exactly what I hear during operation

[@crazysexycool180]

kool

[@Haithamsaadany]

sorry for waiting, when I start the engine I hear from the exhaust pipe an irregular access

[@crazysexycool180]

i don't know what you are trying to say, why do you think your valves are bent? if the car is running and not skipping or have a major loss of power, or you have severely overheated your engine, your valves are probably fine

[@patrickzambori473]

That's a lot of disassembly when all you had to do was an easy leakdown test.

[@johnfayette5106]

Can't hear you. Nothing is wrong with my ph.

[@Francois_Dupont]

"this is a DOHC as you can see two cams here" OMG!!! NO SHIT SHERLOCK!

[@biodieselable]

It’s an engine not a motor!! Motors are electric

[@truedreams1]

I think most cars are interference

[@thelagmeister]

I had a 1988 corolla 4a 1.6 that was a non-interference engine. That was the only one ive heard of.

[@steveandrews8301]

I read recently that 70 percent of new cars today are interference motors.

[@johnhanselman6371]

Isuzu Rodeo with a 3.2 motor is Non-Interference. I do not know about the 2.2 motor

[@Ben-nx7yy]

Is that a Mitsubishi 3000 lol cause it looks like that v6 i so dislike

[@crazysexycool180]

yep