2002 Jeep Grand Cherokee Thermostat Replacement

2002 Jeep Grand Cherokee Thermostat Replacement

We walk through the steps of replacing a leaky thermostat in a 2002 Jeep Grand Cherokee 4.7L V8. Hope it helps a little. This is my first video … sorry if …

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Aaron Dragg says:

Just a little advice, if you find your T-stat housing leaking on this
vehicle, replace the T-stat itself. There’s no housing gasket, for one
thing, so don’t waste time looking for that. The T-stat itself has a gasket
and that’s what seals water at the housing. If you remove the T-stat and
the gasket looks good and you’re puzzled why it’s leaking, just replace it.
When you get the new one, you’ll realize the gasket is MUCH thicker on
newer T-stats. The factory ones were very thin and eventually leak. A new
T-stat has a much thicker gasket (a rubber ring around the T-stat) and
that’s what does the job. Simple job. And REMEMBER, use only HOAT coolant
in this vehicle. There are only 3 kinds. The pink stuff from Mopar, Zerex
G05 (easiest to find without going to the dealership. O’Rielley’s has it
usually), and another one. Motorcraft Gold? Not positive. If one person
reads this and I help save their radiator by warning them of using proper
HOAT coolant, that’s awesome. Some people will choose to risk it and use
cheaper green stuff, but whatever you do, don’t use orange (Dex Cool). It
can turn to gel in unpressurized systems and either the green or orange is
what caused me many problems including a new rad. Also, Dex Cool is OAT,
not to be confused with HOAT which is only from Mopar and Zerex G05 (and
the other one I’m forgetting). HOAT is usually pink or gold/yellow and more
syrupy. Good luck, the cooling systems in the Jeep WJ will cause lots of
headaches. Worst radiators I’ve ever seen. And one last side not, try to
NEVER let your 4.7 V8 overheat much. Never risk it because they’re very
prone to warped heads, head gasket failure, valves dropping out, etc. The
aluminum heads expand much faster than the block and at high heat they can
easily warp and in many cases even expand enough to allow the valves to
drop right out. Do your homework on JeepForum when doing any job on a WJ
because they’re very finicky, especially the V8 and especially the more
exotic the options your model has. Lots of special fluids that DO matter
and lots of other things like being picky about spark plugs, etc. 

Alex Ionescu says:

gread video I’m glad people have time to record their auto repairs
sometimes. I’ll replace my thermostat today and this video helps. Great
jeep!

kenny roman says:

Great video 

Kendrick Golden says:

My jeep is running hot when its sitting for a long time. but when i start
going the temperature hand goes back to normal. Is that a sign that i need
to replace my thermostat?

Erick Escareno says:

Perty similar

Erick Escareno says:

Hey thanks I got a bad sensor

Erick Escareno says:

Hey thanks I got a engine light on and it’s the thermostat on jeep
commander 2006 hemi

RedFTW89 says:

I hope that’s where my leak is coming from. Much easier than doing a water
pump.

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