2004 Ford F-150 4.6L Thermostat Replacement | Trouble Code P0128

[@Scorpio-q9z]

I know this video is old but man when are you telling stories around a campfire or at an old saloon I’m there. Your voice is awesome for instructional videos so clear and wise

[@GWPHomestead]

Appreciate the compliment!

[@brentyodad]

Very clear and concise with good camera angles. Something other KZbinrs would make a 20 minute video, when yours is 7. Perfect.

[@thomas8043]

The best auto how to ever. Perfect camera angle fast and made so easy to understand. Thanks l will tell others.

[@GWPHomestead]

What a compliment - thank you for watching!

[@Ecrowder51]

I have an 04 Expedition with the same problem. I really appreciate this video and thanks for the tip about getting the funnel that will burp the system that's really important.

[@GWPHomestead]

Glad it helped, thanks for watching!

[@thomasgatlin7099]

Thank you! Ordering the thermostat, gasket and funnel kit off of your links! Will get er done next weekend!

[@GWPHomestead]

Good luck to you!

[@manofwill2468]

Simple and easy to follow. Thank you sir.

[@sandystrait3878]

Thanks for posting this video. I'm having trouble with my heater and I've flushed the radiator which helped a little but the cabin air really only gets hot when I rev the engine allot. I'm hoping the heater core doesn't need to be replaced so I'll do the thermostat first since the truck has a 195K miles and it's probably overdo to be replaced anyways.

[@GWPHomestead]

I like to start with the easiest solution first and work my way up from there. Best of luck!

[@markfcoble]

Thanks. Going to replace on 1998 with 218k miles after radiator flush.

[@GWPHomestead]

Best of luck to you!

[@alvinesprit9173]

Thanks 👍👍

[@slowpokerodriguez23]

Super helpful brother thank you for your video

[@adalbertocorrales7054]

Thank you for your job and the time you have to be able showed up the video thank you so much 👍

[@GWPHomestead]

Hope it helps - thanks for watching!

[@leonsam12]

Just bought a thermostat, I guess I could use a radiator flushing as well, gonna get both done soon, had same engine light/code

[@GWPHomestead]

Hope it goes well! Thanks for watching.

[@bbrahbboul2748]

How many gallons of cooling fluid should i have before taking the thermostat off ?

[@lobomedina8288]

Thank you sir very helpful video..

[@samidolark1912]

Exactly what I needed!

[@GWPHomestead]

Best of luck!

[@clintonbean856]

Did the check light go off

[@ugotlj4133]

Thanks

[@michaelescalante7718]

chrisfix is da man

[@rocaduradj6390]

gracias boss for your video gonna help me to do my job

[@GWPHomestead]

Thanks for watching! Good luck to you.

[@wesleyskeen4065]

Great video. Thank you!

[@GWPHomestead]

Hope it helps - thanks for watching!

[@Joe-df5ob]

Do you add a little bit of coolant to the reservoir and then start the truck? Or start the truck first and then add coolant?

[@GWPHomestead]

The reservoir has a cold fill line on it so filling it to that point would be good. I used a spill-proof burping funnel to fill mine to make sure any trapped air bubbles could get out and that requires adding some coolant while the engine is running.

[@Sausage_God]

My temp runs a little high. Light right at the half way mark on the gauge. But it does go down. Its just a little high for my liking. Im guessing the thermostat is causing that too?

[@GWPHomestead]

Can't tell you for sure, but it's a cheap and easy place to start

[@genzisgod4930]

Thank you man. 😊 you made this easy.

[@GWPHomestead]

Glad you found it helpful!

[@travandjoutdoors]

Awesome video! Great job!

[@GWPHomestead]

Thanks for watching!

[@scottblais7475]

So the temp gage in my 05 goes from cold to the middle within 3 min. Now I'm getting cool rather than heat...no check engine light on. Not sure if I should replace the thermostat or flush system? Any thoughts??

[@GWPHomestead]

I’m not sure, sorry. Thermostat replacement is a simple and easy place to start but I’m not sure if it’ll fix your problem.

[@Ajw3104]

Was your temperature gauge working I think mine problem might be the head coolant sensor because my temperature gauge is not working

[@GWPHomestead]

My gauge was working correctly. Never had to fool with the sensor, sorry.

[@Ajw3104]

@@GWPHomestead thanks

[@BobDylan-d9n]

No gasket sealer stuff?

[@GWPHomestead]

No just a new gasket with the thermostat

[@ddewaukee3105]

How can you tell it was stuck open? Thanks for the video

[@GWPHomestead]

The thermostat controls the flow of coolant between the engine and the radiator. They are designed to open at a certain set temperature; once the engine reaches that temp the stat opens and allows coolant to flow thru the radiator so that temperature is maintained. By looking at my temp gauge on my dash as well as my digital gauge on the programmer I could see that the temp was low, meaning that coolant was moving thru the radiator before it was supposed to. It’s a better problem than being stuck closed (engine overheating) but it still needed to be corrected. Thanks for watching!

[@ddewaukee3105]

@@GWPHomestead thanks for the reply much appreciated, did you also had problems with your heat inside the cabin not blowing out enough hot air? Do you remember how many degrees F⁰ was your coolant? Thanks again

[@GWPHomestead]

I've heard that cabin heat can be a problem with a stuck open thermostat but it wasn't something that I ran into, at least not to a level that I really noticed. I think my coolant was running about 160degF when it should be 195. Haven't had any problems since I made the repair.

[@hatteraslabuf]

How many miles on the truck? Have you ever backflushed your heater core?

[@GWPHomestead]

200,000 at the time this was filmed, up to 218 now. Have never backflushed the heater core.

[@preidol2003]

I have a 2004 4.6L F150, never had to do a core flush, mileage is at 221,000 miles and still going. My thermostat started leaking, I'm glad I found this video.

[@GWPHomestead]

Hope you found it helpful, thanks for watching!

[@emilioasuarez8259]

I'm having a issue with a 2004 f150 4.6 I change my termostat to a 160° now my engine light came on saying my engine is running to cold BS I also have a 2008 f150 4.6 that I did the same thing and no light at all and is running beautiful so what's can be the problem?

[@GWPHomestead]

160° may be too low, I think the Motorcraft part from the factory is a 190°. Not sure why it would be fine in one but not the other but I would think you’d need a higher temp stat.

[@westcoastg4life]

What temp thermostat did you use ?

[@GWPHomestead]

195°F

[@whitetail313]

Can you tell me what type and you got you gryphon programmer

[@GWPHomestead]

I bought it from Power Hungry Performance back in 2014. I like it fine but it turns out I haven’t done as much to this truck as I thought I was gonna when I bought it so I don’t think I’m maximizing my use of the programmer. If nothing else the ability to read trouble codes and monitor temperatures, RPM, etc is very nice.

[@whitetail313]

@@GWPHomestead ok thanks

[@kennethcorkhill7461]

I have a 2006 f150 v6 its over heating while driving. Would this fix that issue also ? Thanks

[@GWPHomestead]

It could be a problem with the thermostat but there’s really no way for me to know what the cause is. Are you getting any check engine or trouble code lights on the dash?

[@kennethcorkhill7461]

@@GWPHomestead none as of now . When I’m in park or slower speed 50mph temp gauge goes back down to normal.

[@GWPHomestead]

Strange. Sorry I’m no help, I hope you can get it figured out!

[@garreth629]

I imagine you've already solved the problem by now. Having said that it could be, but their is enough other potential things in the cooling system to cause the same issue. Honestly if there are no obvious coolant leaks and enough coolant in the system its probably what I'd try first as its relatively cheap and easy to do yourself. Honestly another thing I'd check is that the fans on the radiator working correctly. I know on my 2001 f150 it has a mechanical fan driven by the serpentine belt. I'm not sure if these later trucks had electric fans or mechanical as well. If they're electric they don't usually run constantly. Sometimes only once the vehicle is up to temp. They're also maybe be a second fan for the ac system so dont confuse additional fans. If the fans appear to be working properly and replacing the thermostat it could also be the water pump or a radiator issue. These are the most likely culprits. Potentially they're could be other issues but they're more likely to cause other noticable issues. The thermostat is generally where I'd start if I'm not experiencing other problems. Plus on most vehicles it's cheap and easy. Actually even if I know its another cooling issue I tend to change it because its cheap insurance I likely won't have to change it soon after.

[@MalleusDei275]

A 180 thermostat will work for 5.4 motors that won't hold enough oil pressure at higher temperatures .

[@MalleusDei275]

After replacing rocker/ rollers .. I'll try with the original thermostat temperatures. Then move on to my timing chain ... Oil pressure is more important than temperatures for this ...

[@hatteraslabuf]

Is your truck a Heritage model? Or, the newer version of the same year

[@GWPHomestead]

It’s a new body style.

[@danielstedman9248]

What were the torque amounts, I only see 8 comments

[@GWPHomestead]

Check the Tork Spec link in the description, you should be able to find everything you need there!

[@christopherwynn4978]

Nice about do mine

[@MrRhlozano]

Thanks for the tip. I've got the same code & I myself thought that the fix was to change the thermostat. Now I know for sure.

[@GWPHomestead]

Best of luck - thanks for watching!

[@bbrahbboul2748]

Awesome video , thank you