<VV> Valve Seats
dziegler3 at comcast.net
Thu Nov 15 10:58:56 EST 2007
I also had a replaced seat drop out on a 1969 95 hp engine in less than
150 miles on the repaired head. The first one in over a thousand such
repairs. I was promptly given a new head with a new valve job as a
On Nov 15, 2007, at 12:13 AM, Frank DuVal wrote:
> 20 years ago I was having seats replaced on many Corvair engines. I
> had a shop ( actually it was called "The Shop") in Hopewell, VA do
> many heads for me. Maybe it is the humidity, and the seats were
> rusting out just like the car bodies! ggggg
> Even back then although 140s were the main culprits, turbos, 110s and
> 95s all dropped seats. I have seen a 110 driven so long that the seat
> would no longer touch any aluminum part of the head...... but it was
> still hanging on the intake valve. That was about 1980. (64 Monza
> Frank DuVal
> james rice wrote:
>> All: I do not remember valve seats being an issue 20 years ago,
>> maybe on race cars. Given Warren's observation, is there a
>> solution? Letting the engine cool down before shut off? 70 deg
>> garages in
>> the winter time to keep everything warm?
>> I do not know what the current process and procedures are for valve
>> If I remember correctly, Jim Schardt, before doing any of his head
>> modifications, use to take the seats out, heated the heads and
>> cooled what I presume were oversize seats and press them in with
>> Jon Brakke, who was the last person to SCCA race Stingers
>> said he had his head re-heat treated before doing anything else. I
>> he took the seats out first.
>> Are there any shops doing this to street heads today? At what cost?
>> heat treat specifications?
>> Warren, Seth, Bob H and Bob C., got any info?
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