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-   -   94 xj overheating (http://www.jeepforum.com/forum/f19/94-xj-overheating-1565429/)

bmxchan 08-21-2013 08:01 PM

94 xj overheating
 
Hey guys I've taken off the header and its not cracked and the gasket isn't blown, it's got a new radiator also. What do you guys think is making it overheat and have a little smoke out the tailpipe. It's a 94 and has 110,000 miles on it. Overheats after about 15 minutes.

uberxj92 08-21-2013 09:41 PM

Do you mean the exhaust header or the engine head?
4.0?
Are you loosing coolant?
Is the a/c on when she gets hot?
Is the electric fan working? How old is the water pump?
Stock radiator hoses?
Are you sure the gauge is accurate? How hot is it when it overheats on you?
Sorry for so many questions. But they are gonna be asked soon.

bmxchan 08-21-2013 10:03 PM

Quote:

Originally Posted by uberxj92
Do you mean the exhaust header or the engine head?
4.0?
Are you loosing coolant?
Is the a/c on when she gets hot?
Is the electric fan working? How old is the water pump?
Stock radiator hoses?
Are you sure the gauge is accurate? How hot is it when it overheats on you?
Sorry for so many questions. But they are gonna be asked soon.

Engine head
4.0? yes
Loosing coolant? Yes
A/C? Not working
Electric fan working? Yes
Water pump? 3-4 months
Stock radiator hose? No
Gauge accurate? Not sure how do I test it?

uberxj92 08-22-2013 12:55 PM

Sounds like the head gasket was bad. They don't always look obvious but could've been leaking.
What temp did the gauge say when it overheated?
When it overheated was it steaming or boiling over?
Best way to test the gauge is to use a laser temp gun. I bought one for $20 at harbour freight.

bmxchan 08-22-2013 05:43 PM

Turned out to be a hairline fracture in the head and the gasket was blown

uberxj92 08-22-2013 07:16 PM

Ouch

bmxchan 08-22-2013 08:09 PM

1 Attachment(s)
Attachment 660249

Between valves on cylinder 1


The time now is 03:38 PM.

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