Maching Heads
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
Maching Heads
I just got my heads looked at due to a blown headgasket and they checked out fine. It got me thinking on how much a head can be warped before it has to get machined. Does anyone know the exact number? I would think it would be so many thousands of an inch. I'm curious to know!
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
I checked several books on SBC buildups and found no figures on acceptable warpage. I think the consensus is that "any" is too much.
Since the heads are off it would likely be a good idea to have the guides checked, a 3 or 5 angle valve job and such done before they are installed.
Since the heads are off it would likely be a good idea to have the guides checked, a 3 or 5 angle valve job and such done before they are installed.
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
heads
I was talking to my machinist friend, and he said that the blue felpro head gaskets have enough crush to take up head warpage to about
.005. He said that no warpage is the most desired, but the gaskets make the warpage factor a non issue unless it is severe.
.005. He said that no warpage is the most desired, but the gaskets make the warpage factor a non issue unless it is severe.
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
