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Unread 03-31-2014, 10:52 PM   #1
tacozappy
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1997 ZJ 
 
Join Date: Jun 2013
Location: ROUND ROCK, Texas
Posts: 65
blown head gasket

So i finally took the head out. the gasket is bent, and there is this orange, rust looking stuff in the back of the 6th cylinder wall, and a little bit on the 5th, some coolant can be seen in the back of the jacket. I will take my head in, how do i tell my cylinder block isn't messed up. Say i take it in to get maganfluxed and decked and get a new gasket, what's the chance of me encountering another blown head gasket? I bought this jeep and i don't want this to happen to me at all. I have a high school auto club and i want to be able to tow people and a track car.

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Unread 04-01-2014, 07:38 AM   #2
zjosh93
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1993 ZJ 
 
Join Date: Aug 2010
Location: Austin
Posts: 1,207
Pictures? You can clean the deck really well and use a mechanics straight edge and a feeler gauge to check for warping. Cracks you would need to take the block in to have it magnafluxed but cracks in the block are usually pretty visible anyway and the 4.0 block isn't prone to cracking. Besides it usually takes a catastrophic event to crack a block. I'd just have the head checked out and slap a new gasket on there.
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Unread 04-01-2014, 09:08 PM   #3
tacozappy
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1997 ZJ 
 
Join Date: Jun 2013
Location: ROUND ROCK, Texas
Posts: 65
i just took the head in and it's cracked are there any more durable heads then just the stock sold?
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Unread 04-01-2014, 09:35 PM   #4
AVR2
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1993 ZJ 
 
Join Date: Apr 2007
Location: UK
Posts: 2,294
The stock head is all you need. Mine is 22 years old, it was removed for the very first time for a valve job last year, and it checked out fine, even though the PO had neglected it (and God knows what the POs before the last PO did).

Sounds like something major happened to your engine in the past. Put a replacement stock head on there and keep up with routine maintenance and the head should outlive the rest of the ZJ.
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Unread 04-01-2014, 09:47 PM   #5
tacozappy
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1997 ZJ 
 
Join Date: Jun 2013
Location: ROUND ROCK, Texas
Posts: 65
where could i find a head that is pre-built, I would like to have one ready to go in.
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Unread 04-01-2014, 10:03 PM   #6
AVR2
Web Wheeler
1993 ZJ 
 
Join Date: Apr 2007
Location: UK
Posts: 2,294
You haven't Googled this, have you?

ProMaxx Performance (formerly known as Alabama Cylinder Head) and Clearwater Cylinder Head are often recommended. Clearwater definitely sells fully-assembled heads.
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Unread 04-02-2014, 12:43 AM   #7
big98tnzj
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1998 ZJ 
 
Join Date: Jul 2013
Location: elizabethton, tn
Posts: 828
Dover cylinder head sells ready to go heads. They are pretty decent priced too.

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