ZZ4 head swap, head bolt part numbers?
10-19-2009, 10:55 AM
#1
ZZ4 head swap, head bolt part numbers?
Hey guys the time has come for me to FINALLY get the heads and cam put in this beast due to the fact I'm not so scared to tune it anymore so here's my next question.
I want to get new head bolts before I swap over but I can't seem to find the right part number for the bolt kit that goes with these heads. I know they are different from regular head bolts due to they need a specific washer on them to not tear up the heads. Or.... can I get away with using my stock ones and put the proper washers underneath them? any help would be great because I'd like to get started this weekend. HELP!!!!!!! lol
I want to get new head bolts before I swap over but I can't seem to find the right part number for the bolt kit that goes with these heads. I know they are different from regular head bolts due to they need a specific washer on them to not tear up the heads. Or.... can I get away with using my stock ones and put the proper washers underneath them? any help would be great because I'd like to get started this weekend. HELP!!!!!!! lol
10-19-2009, 11:05 AM
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Re: ZZ4 head swap, head bolt part numbers?
http://www.competitionproducts.com/p...?number=HB8201 are much cheaper, and proven up to 600 hp.
10-19-2009, 11:54 AM
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Re: ZZ4 head swap, head bolt part numbers?
GM part numbers:
12338045 long bolt w/washer (14 required)
14088946 medium bolt w/washer (4 required)
14088947 short bolt w/washer (16 required)
These bolts are longer overall the same as the thickness of the washer. So the thread engagement is the same as regular bolts and no washer.
There is thread sealant already on the threads.
After pricing these bolts it would be worthwhile checking into ARP bolts. IIRC they were on the pricey side even back in '92
RBob.
12338045 long bolt w/washer (14 required)
14088946 medium bolt w/washer (4 required)
14088947 short bolt w/washer (16 required)
These bolts are longer overall the same as the thickness of the washer. So the thread engagement is the same as regular bolts and no washer.
There is thread sealant already on the threads.
After pricing these bolts it would be worthwhile checking into ARP bolts. IIRC they were on the pricey side even back in '92
RBob.
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