Checking PTV - Cometic Uncompressed
#1
TECH Apprentice
Thread Starter
Checking PTV - Cometic Uncompressed
I'm about to check my Piston-to-valve clearance and wasn't sure about something.
I've got the cometic head gaskets .040" thick. Is it ok to just snug up the head bolts and not compress the gasket when checking? If so, what is the UNCOMPRESSED thickness of these cometic head gaskets?
I'm using ARP head bolts if that matters any.
I've got the cometic head gaskets .040" thick. Is it ok to just snug up the head bolts and not compress the gasket when checking? If so, what is the UNCOMPRESSED thickness of these cometic head gaskets?
I'm using ARP head bolts if that matters any.
#4
TECH Apprentice
Thread Starter
Ok. So your saying that at most the cometics compress .010"....
It's my first head swap, so I'm trying to be extra careful. And I'm am running a pretty tight clearance, so I want to be sure. 799's milled .025 with the .040 cometics.
It's my first head swap, so I'm trying to be extra careful. And I'm am running a pretty tight clearance, so I want to be sure. 799's milled .025 with the .040 cometics.
#6
TECH Enthusiast
Join Date: Feb 2007
Location: Raleigh, NC
Posts: 625
Likes: 0
Received 0 Likes
on
0 Posts
So long as the thickness is correct, you really don't even need to use a head gasket, you can use a spacer of correct thickness and tighten the head bolts finger tight. You do need to measure the thickness of the spacer accurately though, and too thin of a spacer is better than too thick.
Trending Topics
#8
12 Second Club
iTrader: (10)
Join Date: Jan 2007
Location: Charleston, SC
Posts: 226
Likes: 0
Received 0 Likes
on
0 Posts
Also, call me a fool, but when I checked my PTV, i put the head straight on with no gasket, then added the compressed thickness. Of course I already knew that I would have miles of room, so I didn't worry about a valve hitting. If you just put the head on and carefully turn the motor over, I don't think it would destroy anything even if something did contact. Then like I said just add in the value for the gasket.
#9
TECH Senior Member
Also, call me a fool, but when I checked my PTV, i put the head straight on with no gasket, then added the compressed thickness. Of course I already knew that I would have miles of room, so I didn't worry about a valve hitting. If you just put the head on and carefully turn the motor over, I don't think it would destroy anything even if something did contact. Then like I said just add in the value for the gasket.