What's going on here?
#1
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Year: 1988
Model: Cherokee
Engine: 4.0 Renix
What's going on here?
Story is I bought this 88 XJ a few weeks ago knowing that it overheated (got a REALLY good price on it). When I checked it out the coolant bottle had a gash in the side, the electric fan didn't work, the thermostat was stuck closed, and the radiator was horrendous. Basically, I knew I had my work cut out for me and it was no surprise that it had an overheating problem.
I first changed out the coolant bottle and thermostat. Gave it a burp and it ran alright for about 10 minutes before it would start to overheat. Got a 2-core radiator for it and just got the fan working the other day. Now it runs good for quite awhile but once the temp gets to the 210 mark (ie operating temperature) the coolant tank starts spraying coolant. Could it just be a faulty coolant tank cap? It has went through it's share of overheatings as I've been troubleshooting this thing through.
Thanks guys!
I first changed out the coolant bottle and thermostat. Gave it a burp and it ran alright for about 10 minutes before it would start to overheat. Got a 2-core radiator for it and just got the fan working the other day. Now it runs good for quite awhile but once the temp gets to the 210 mark (ie operating temperature) the coolant tank starts spraying coolant. Could it just be a faulty coolant tank cap? It has went through it's share of overheatings as I've been troubleshooting this thing through.
Thanks guys!
Last edited by Lucas21; 11-18-2008 at 10:19 AM.
#2
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Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
If you suspect the expansion tank of having a defective tank and you want to never buy another tank again then try this. CLICKY
#3
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Year: 2000
Model: Cherokee
Engine: 4.0L
You should wait on the experts but I will add this:
the 210* Temp is normal for the Jeep, I don't know why the overflow bottle would be spraying at that temp Unless like you said the Cap isn't working?? Does it have an Aux Electric fan also?
the 210* Temp is normal for the Jeep, I don't know why the overflow bottle would be spraying at that temp Unless like you said the Cap isn't working?? Does it have an Aux Electric fan also?
#4
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Year: 1988
Model: Cherokee
Engine: 4.0 Renix
I know 210* is normal, hence why I'm suspecting the overflow tank cap is faulty. Yes I do have the auxilary fan and it is working.
Basically, up to this point I have been having problems with it overheating, now it gets to normal temp and then starts pissing coolant.
ETA: Thanks for the link to that coolant tank. I may consider it in the future but believe it or not that tank would cost almost as much as what I paid for the entire XJ :P The current one has been holding pressure nicely up until it sprayed coolant last night. I still didn't see any cracks in it or anything to indicate that the tank is bad, too.
Basically, up to this point I have been having problems with it overheating, now it gets to normal temp and then starts pissing coolant.
ETA: Thanks for the link to that coolant tank. I may consider it in the future but believe it or not that tank would cost almost as much as what I paid for the entire XJ :P The current one has been holding pressure nicely up until it sprayed coolant last night. I still didn't see any cracks in it or anything to indicate that the tank is bad, too.
Last edited by Lucas21; 11-18-2008 at 10:18 AM.
#5
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Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
I know 210* is normal, hence why I'm suspecting the overflow tank cap is faulty. Yes I do have the auxilary fan and it is working.
Basically, up to this point I have been having problems with it overheating, now it gets to normal temp and then starts pissing coolant.
ETA: Thanks for the link to that coolant tank. I may consider it in the future but believe it or not that tank would cost almost as much as what I paid for the entire XJ :P The current one has been holding pressure nicely up until it sprayed coolant last night. I still didn't see any cracks in it or anything to indicate that the tank is bad, too.
Basically, up to this point I have been having problems with it overheating, now it gets to normal temp and then starts pissing coolant.
ETA: Thanks for the link to that coolant tank. I may consider it in the future but believe it or not that tank would cost almost as much as what I paid for the entire XJ :P The current one has been holding pressure nicely up until it sprayed coolant last night. I still didn't see any cracks in it or anything to indicate that the tank is bad, too.
#6
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Year: 1991 Laredo
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Engine: 4.0L H.O.
Get a new cap first off I'd say. After that if you want to work out all the possible weak links in your coolant system, water pump? I'd do that for sure especially if you're changing the radiator and everything else.
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#8
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Year: 1988
Model: Cherokee
Engine: 4.0 Renix
Does anyone have a suggestion on a cap to get? Would one from CarQuest or an auto parts store work alright or would I be better off getting an OEM one?
Thanks for all your help guys!
Thanks for all your help guys!
Last edited by Lucas21; 11-18-2008 at 11:23 AM. Reason: punctuation
#9
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Year: 1988
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^I appreciate the help but I think we are talking about two different "caps" here. I'm asking about coolant tank caps. Looks like you are talking about ignition.
#13
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Year: 92
Model: Cherokee
Engine: 4.0L HO
also make sure that your temp sender is working, I had one that was broke inside the brass collar so it wasn't giving a true reading. In fact I discovered it was broke when I went to check the voltage and pulled on the connector and the sender came out of the collar.
#14
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Year: 87
Model: Cherokee
Engine: 4.0L
I had that problem before on my 87!!! It was fine, then one day it starts over heating. Didn't know what was going on. Turns out my year old cap was cracked and not holding presure. Replaced it and all is fine now