i want to replace the head gaskets on my iroc but im not too sure about it, my iroc has the L98 5.7L, do i have to mess around with the timing or anything to take the heads off and stuff? cause i dont wanna break it anymore that it already is.

plz help thx

 

shouldn't have to mess with timing.

 

how would you NOT have to mess with timing, considering you have to pull the intake to pull the heads and last time i checked the distributor has to be pulled first.

 

Im considering the same thing, being as i have to replace some other gaskets to fix an oil leak, but i was under the impression that you have to have the block and heads machined flat? but i might be wrong, it happens

 

If your head gaskets are OK and you're just changing them because you're doing every other gasket, then they won't need machining, but you have to make sure the surface is clean before putting a new gasket on.

If you have blown head gasket + aluminum head, then I'd recommend getting them checked by a machine shop and shaved if necesessary (about $40 per head).

Iron heads don't tend to warp like the aluminum ones. Aluminum has a much lower melting temperature than iron, meaning it warps at a lower temperature than iron will as well.

As far as timing goes, as long as the distributor rotor, and body are clearly scribed to the intake before removal, there shouldn't be any issues when reassembling.

Lifter Preload is a different story. Not bad though.

 

LOL...damn, I didn't even think about that. I even just put new heads on my buddies monte carlo the other night too....it was a late night for me when I typed that....lol.