Rebuilding the cooling system... Head gasket? - JeepForum.com

 
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post #1 of 6 Old 10-14-2013, 06:37 AM Thread Starter
congerz83
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1996 ZJ 
 
Join Date: Jun 2011
Location: Congers
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Rebuilding the cooling system... Head gasket?

Overheated my 4.0 ZJ yesterday. I'm ordering all the parts I need today. Should I do the head gasket just for the hell of it?

I should note that it was driven until it quit... Had no choice. I was down in the Meadowland and had to get inside the lot or chaos would've ensued. It still starts and runs fine when cold. Oil is clean as a baby's butt.

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post #2 of 6 Old 10-14-2013, 06:43 AM
newfieZJ
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Compression test would tell you what to do fast enough
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post #3 of 6 Old 10-14-2013, 06:51 AM Thread Starter
congerz83
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Quote:
Originally Posted by newfieZJ View Post
Compression test would tell you what to do fast enough
Oh yeah... At the radiator, right?
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post #4 of 6 Old 10-14-2013, 07:19 AM
newfieZJ
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Remove all spark plugs and test each cylinder with a proper gauge . Determine if any damage was done , check engine's health . Sounds like you got lucky , 4.0's are tough . Still , this is something I would recommend before any engine work . Circles the problem area if any .

You can also just take the cap off once re-filled and check for bubbles constantly coming coming from the coolant . In this case , just re-fill it with water and call it a flush of sorts for testing purposes . I think it would bubble through the coolant reservoir also when at full operating temp
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post #5 of 6 Old 10-14-2013, 05:38 PM Thread Starter
congerz83
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all cylinders @ 127-128psi
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post #6 of 6 Old 10-15-2013, 05:16 PM Thread Starter
congerz83
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1996 ZJ 
 
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Location: Congers
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Got everything pulled apart today... Just waiting on parts. WHAT FUN IT WAS TO REMOVE THE FREEZE PLUG!

Here's a couple pics behind the thermostat and pump before I pulled the block-drain and rinsed it all out...
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