Mailing List lml@lancaironline.net Message #43842
From: <asw20747@aol.com>
Sender: <marv@lancaironline.net>
Subject: Re:More Loose Screws
Date: Wed, 29 Aug 2007 10:41:59 -0400
To: <lml@lancaironline.net>
I could not see any visible damage to the exhuast valve on my #5 when it ate a screw  but when tested by the cylinder shop the exhuast valve was leaking due to damage from the screw exiting. Even if the valve was fine the shop ground off all the burrs and high points caused by the screw to prevent them from becoming a source of heat that causes the mixture to ignite early. Preignition  will quickly ruin your day and the engine.
 
Maybe I missed it. Did your friend pull #2 cyl and have it checked and cleaned up? I not an A&P, but I would recommend it. I did the R&R myself for the cost of a few gaskets. The local shop charges a flat $300 for the job. That, plus the cost of any cylinder work is cheap insurance, in my humble opinion.

Paul:

As far as I know, they did a compression check on all the cyl's and they were all (including #2) above 76/80.  I'm not an expert on this at all, but wouldn't that indicate an intact valve seat(s)?

Thanks for you help in originally bringing this to our attention.

Erik Larson

Legacy
N74FX

Email and AIM finally together. You've gotta check out free AOL Mail!
Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster