Head gasket failure - causes? - JeepForum.com
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post #1 of 5 Old 07-09-2011, 04:11 AM Thread Starter
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1995 YJ Wrangler 
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Head gasket failure - causes?

I stumbled on a truck with a 401 in it. It runs but a head gasket is blown. I can change the head gaskets for about $135. What I am concerned with is what would cause the head gasket to go. If I buy it is there something to look for?

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post #2 of 5 Old 07-09-2011, 05:20 AM
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1983 CJ7 
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Extreme overheating can warp a head. Putting a new gasket on it will probably not work if that's the case.

The head will have to be trued and possibly the block decked.

Vibration? Bump steer? Wandering? Read the article (sticky) on Steering, suspension, and driveline.
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post #3 of 5 Old 07-09-2011, 06:56 AM
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1979 CJ7 
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If you remove the heads due to a blown gasket, you should have them inspected for cracks, and if none found, you should have them resurfaced.

The truck probably overheated!

79 CJ7 "CJ Express" 4.2L, NV4500, D44 rear
69 800 with SBC, SM465, NP205, 14BT
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post #4 of 5 Old 07-09-2011, 05:04 PM Thread Starter
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Thanks for the info. I was too slow and missed out on it.
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post #5 of 5 Old 07-09-2011, 06:04 PM
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1974 CJ5 
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cross your fingers it's a gasket and not a cracked head.
401 head? ouch!

If it's good TO you, it's gotta be good FOR you....
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