How to replace a thermostat (WILLYS JEEP L-134)

Is your engine overheating? Do you not have any heat inside the cab? Could be your thermostat. This video covers how to remove the thermostat in the willys Jeep 134 go devil flat head 4 cylinder gasoline engine.

[@wildbluewilly1949]

Appreciated. It may be simple but… there are many of us just starting out. 👍

[@MitchKrisRegal-qe2wc]

Excellent presentation. I appreciate the spacer information!

[@geoffreyclark2805]

Great tutorial, it's nice you're helping out your friend with his Jeep. It's an amazing vehicle, so versatile.

[@motorv8N]

Thanks for the walk through - haven’t opened mine up yet so wondered how that spacer worked. Now I know!

[@redeyecafegarage7484]

Sure! Good luck!

[@carafredrickson2145]

Fabulous video, very detailed!! I bought a '42 Willys to learn mechanics on and I really appreciate these videos, thank you!!

[@redeyecafegarage7484]

You’re welcome! Thank you for the feedback. Let me know if there’s anything specific you want to see. I work on these all the time but don’t always record.

[@rsxrsx]

Thanks for the thorough video, great for use noobs. Made me feel a lot more confident about working on my Jeep. Thanks again.

[@redeyecafegarage7484]

Sure! Glad to help out!

[@fastdadgarage-northsouthch4418]

The small hole has never negatively affected my cooling system. And I’ve never had air pockets.

[@niclasedelsten6428]

Hi. very good and informative video. adequate pace through the video and good explanations. I just got up to speed on my -46 cj2A, I'm solving one thing at a time, one after the other.

[@redeyecafegarage7484]

Thank you! I’m glad you liked the video!

[@mariakerr3188]

Nice video 👍🏼👍🏼👍🏼👍🏼

[@redeyecafegarage7484]

Thank you!

[@michaelcampbell7994]

Great, helpful video! Do you happen to know the length of the three bolts that hold the thermostat housing to the head? When I took mine off, there were two different length bolts.

[@redeyecafegarage7484]

Thanks! They should be 3/8-18x1.250” with a lock washer

[@MitchKrisRegal-qe2wc]

Do you have a video on replacing the fuel pump for an f134? I want to make sure that I do it correctly.

[@redeyecafegarage7484]

I don’t but I can make one shortly.

[@pepsi666]

Great, how do you remove that sleeve if there is already one in there ? Cant remove the stat with the old one in there Apart from that, its pretty much the same as a Ford Cortina (a UK vehicle)

[@rsxrsx]

I didn’t believe you that people rigged up stuff to hold the thermostat till I opened up my Jeep. Yup three screws diagonally holding the thermostat in place. Wow more work to do it the wrong way.

[@redeyecafegarage7484]

It’s crazy isn’t it!

[@bigsmokesal4204]

What type of engine does your jeep have? And helpful video!😄

[@redeyecafegarage7484]

This is a friends Jeep. It has the stock L-134 in it. My Jeep has a Vw tdi engine.

[@revolution3797]

I have a generator with a 4 cylinder Jeep willys engine ZXB M5 generator. Really nasty radiator flushes, installed a temperature gauge. At shut down engine temperature red 165 and raised to 185. I'm still doing engine flushes just because it was that bad full of debris and junk. For these older world war two machines what kind of radiator fluid should you use and what kind of radiator thermostat should I buy at what temperatures? As in the temperature reading on the thermostat itself and what's the proper reading of the engine a manual says 165 to 140. Thermostat open at 165 fully closed at 140, so this is why I feel that it's overheating

[@redeyecafegarage7484]

Just plain old green stuff is fine for these Jeeps. It’s very common for them to run between 170-190. I don’t worry until they get over 210. If it’s not blowing steam or losing coolant then it’s probably fine.

[@revolution3797]

Really appreciate you getting back to me very rare that people still talk about or want to talk about these engines, one other question the thermostat mine came with the original brass thermostat, today's models of thermostats will those work just fine and these engines I would have to say I would choose the CJ5 thermostat for my zxb M5 generator 4-cylinder. Your thoughts and opinions?

[@dalemunsey6809]

when are you going to work on the truck

[@redeyecafegarage7484]

Very soon! I’ve been swamped in the machine shop making parts and tools for people. Now that I’m caught up and the weather is improving I’m ready to test into it!

[@jeffsquire4101]

Why is the thermostat up in the housing and not in the head ? seems to me that it would open sooner in the head , ?

[@redeyecafegarage7484]

The location is a non-issue. It’s how it was designed.