<VV> valve seats revisited (Engine Braking)

[jvhroberts at aol.com]

 Not quite. It means ALL Corvair engines need both better cooling and better valve seat retention. A CHT won't tell you when the seats are about to come loose. That's an inevitability on a lot of these engines. 

 

John Roberts
 

 

-----Original Message-----
From: FrankCB <FrankCB at aol.com>
To: vairmike <vairmike at sbcglobal.net>; virtualvairs <virtualvairs at corvair.org>; judynrandy <judynrandy at comcast.net>
Sent: Tue, May 8, 2012 1:23 pm
Subject: Re: <VV> valve seats revisited  (Engine Braking)


That's why IMHO not just turbos and 140s but ALL Corvairs need at least  
ONE head temp gauge.
 
Frank Burkhard
Boonton, NJ
 
 
In a message dated 5/8/2012 11:23:43 A.M. Eastern Daylight Time,  
vairmike at sbcglobal.net writes:

My  experience with dropping valves has mostly been when going from steady 
hwy  
cruising (no indication of overheat) to closed throttle exit ramp. I could  
see 
hill climbing to engine braking could easily be worse. I think most of  my 
cases 
of dropped valve seats were caused by a previous (months or  years) 
overheating 
from broken/thrown belts.

Mike  Kost


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