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| #1 | |||
[I'm That Good] | Engine Still Overheating After Water Pump Replacement
__________________ Pimptiva.com 95 YJ Sahara - 2.5" RC with 33's and some AtoZ Stuff. Green Jeep Club Member #177 | ||
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| #2 | |
Registered User | I'd check to make sure you don't have an air pocket some were first. Just start it, take the cap off and wait for it to warm up and see if any bubles work their way out, be carefull not to let it over flow or burn your' self. Then if it still does it I'd change the thermostat. __________________ '95 YJ 4.0L 5-speed, SOA, 1 1/2" R.E. springs, R.E. shocks, header,Flow Master cat back, Poison Spider rock sliders Full width D44 front D60 rear 38" SSRs |
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| #3 | ||
Registered User | Your Thermostat could only be opening partially. So Haynes *kinda* mislead you there. ![]() Plenty of things can cause an engine to run how: clogged up radiator, fan/clutch failing, collapsed radiator hose, A/F mixture too lean.... __________________ Quote:
If you're still confused click here to see how I view the forum. | |
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| #4 | |
Registered User | Had a similar problam that outlasted 2 radiator replacements and 2 themostat changes. Everything was flowing and my fan was blowing but I kept runnung hot, usually around 240 or so and would hear it boiling when I parked. Turned out my fan clutch was not working properly. The clutch contols the speed of the fan and I couldnt imagine how slow mine was moving until I put in the new one. Now I run cool <180 in traffic. Cost $35 bucks aqnd about an hour for the easy fix. __________________ KING OF THE DRIVEWAY YJ '89 4.2 UNDER CONSTRUCTION "But I thought you fixed it last week!!" |
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| #5 | |
Registered User | Yep...my vote is fan clutch, especially if it happens in town, at stop lights/in traffic. Usually a thermostat replacement is pretty standard with a water pump replacement, so I'd to that, too, just to cover your bases. Thermostat replacements are easier than changing your oil. |
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| #6 | |
[I'm That Good] | I'm guessing that with the shop doing the fix (and him being a YJ owner), he would've got the air out of it. Possible that he didn't... But, I think maybe I'll swap out the tstat anyways (could be a quick, cheap fix if that IS the problem). The fan SEEMS to be running the same as always. Possible that it's not, so... I guess maybe that's something to consider too. __________________ Pimptiva.com 95 YJ Sahara - 2.5" RC with 33's and some AtoZ Stuff. Green Jeep Club Member #177 |
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| #7 | |
[I'm That Good] | Is the fan clutch outlined anywhere in the Hayne's manual? I can't seem to find anything about it. __________________ Pimptiva.com 95 YJ Sahara - 2.5" RC with 33's and some AtoZ Stuff. Green Jeep Club Member #177 |
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| #8 | |
[I'm That Good] | Nevermind... Found it. :-p __________________ Pimptiva.com 95 YJ Sahara - 2.5" RC with 33's and some AtoZ Stuff. Green Jeep Club Member #177 |
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| #10 | |
Web Wheeler Join Date: Mar 2008 Location: Southern California Posts: 1,076 | Just a question...was your radiator cap replaced as well? If it's old, it won't hold the necessary pressure. |
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| #11 | |
Registered User | If u have been threw mud lately the back of the radiator may be clogged, that happened to me once but idk. |
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| #12 | |
Registered User | Good way to check your fan clutch (not 100% though) is to grab your fan blades and see if there is any play in the fan clutch. There should not be any forward/backward movement. This can definitely cause your problem. If youve replaced the pump, stat and the fan clutch checks out, remove the radiator and have it rodded or replaced. Leaking head gasket would be an issue too, you can check for water in the oil and look at the plugs for an indication of this problem. __________________ Im not hating on LSDs, I think they work great on pavement. CJ # 113 |
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| #13 | ||
Got my eye on you..... ![]() | Quote:
DO NOT DO THIS TEST WITH THE ENGINE RUNNING!!!!!!!!!!!!!!!! | |
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| #14 | |
Registered User | With your engine off and cold you should be able to spin your fan by hand.Then start the engine and let it get hot.you should hear when the fan clutch locks up and spins the fan.if you're running real hot and shut the engine off you should not be able to spin the fan until it cools down again.It could also be a faulty temp gauge but i doubt it if you hear boiling and had pump trouble. |
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| #15 | ||
Registered User | You have GOT to point me to the thread where this happened (if any)!! That's like people taking Preparation-H orally.... and stuff. ![]() __________________ Quote:
If you're still confused click here to see how I view the forum. | |
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