Where is the thermostat? - JeepForum.com
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post #1 of 7 Old 07-28-2009, 03:55 AM Thread Starter
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2012 JK Wrangler 
Join Date: Jan 2003
Location: Idaho
Posts: 162
Where is the thermostat?

I was changing the oil and just checking things out in the engine bay yesterday. I followed the upper radiator hose to where it connects to the motor and was unable to find a removable water neck. The hose just connects to a large metal section on the front of the block. Where is the thermostat located at on this motor? I dont need to replace it, just wondering where it is for future reference.

2012 Wrangler Sahara 3.6/AT
2001 Dodge 2500 CTD/AT
1967 Mustang 5.8/4spd
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post #2 of 7 Old 07-28-2009, 08:06 AM
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This is for a 2002, but still a 3.7L. It looks as though it is actually where the lower hose connects to the engine block to the left of the pulley. Start on page 21.

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post #3 of 7 Old 07-28-2009, 11:29 AM
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1966 CJ5 
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towards the bottom on the passengers side, just look for a good sized hose coming off the motor and thats probably going to be it.

if you need to change the thermostat, they are a little bit of a pain and you need something under it to catch the fluid thats going to come out

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post #4 of 7 Old 07-28-2009, 12:04 PM Thread Starter
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That kind of sucks. Thanks though, at least now I know.

2012 Wrangler Sahara 3.6/AT
2001 Dodge 2500 CTD/AT
1967 Mustang 5.8/4spd
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post #5 of 7 Old 07-29-2009, 11:45 PM
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1998 XJ Cherokee 
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Be very careful with the 2 housing bolts. If you're lucky you wont break any of them. Use BP blaster if they are hard to get out and take your time. The aluminum side of the housing loves to bond with the steel bolt. I had an easy radiator and T-stat change that went to hell.
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post #6 of 7 Old 10-09-2015, 01:15 PM
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no heat

i have no heat in my jeep liberty 09, thought it was the heater core had it looked at guy said its not the heater core its either the water pump, the belt, or the thermostat. its not over heating so i don't think its the water pump. any ideas??
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post #7 of 7 Old 10-09-2015, 04:33 PM
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2005 KJ Liberty 
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Well you would have an alternator and power steering issue if it was the belt. You actually have a KK Liberty, and theres a sister section for that, however the same rules apply to whats wrong with yours, vs the KJ. First off, does the engine warm up to the middle of the gauge, where it normally runs? Does it maintain that temp on the highway, or idling, regardless? If yes, then your thermostat is likely not a factor. Even if it doesn't warm up all the way, it would still likely make heat. Heater cores are VERY often overlooked on the Libertys. Normally, if there is a difference in the temperature of the two hoses going to the heater core, it's probably plugged. That's likely what whoever did that said the heater core was ok. Problem is, I have seen the hoses have almost the exact same temp on Libertys, and the heater cores were plugged. I even argued for a few days with another technician on one he was trying to diagnose. He kept saying the customer had unrealistic expectations, and that its cold out(It was 30 degrees out, and the tech was from florida, whats that tell you?). It took him going for a ride in mine for him to understand how it should work. Chances are, yours is plugged. How many miles are on it? How many times has the coolant been changed? Was the correct coolant put in it(better not be green, if so, its wrong). Wrong coolant, not changing the coolant when supposed to, etc will cause them to plug up. To fix it, requires removing the dash, and sucking down the a/c system.
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