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From: mgs-owner
To: mgs
Subject: Hardened valve seats
Date: Friday,November 17,1995 7:05AM
Reviving a thread that already went buy, I think I have mentioned that after
years of delay and with a second engine I finally got my '67 B GT on the
road. But after about 150 miles on this new engine a hardened valve seat
fell out. The inside of no. 2 aint a pretty sight any more.
But the interesting point is that my prof mechanic friend has informed me
this is not uncommon. He says this possibility is another factor to consider
when deciding to put the hardened seats in to accomodate the no-lead fuels.
Maybe more frequent valve jobs arn't so bad after all.
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The valve seats were not properly pinned in. Some people use a punch to pin
them in. I have even heard of people welding two little spots on each seat.
All of this can of course cause detonation problems. The problem with
unhardened seats is that over time they will receed and eventually need
replacement. More frequent valve jobs mean more lapping and your seats won't
last too long then either. I think of it more as another factor you have to
consider every time you have someone else do work on your car.
Chris
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BTW I sold my Vet daily driver and moved into the B GT earlier that same
day.
Ernest E. Gilbert
lawref@lawref.com
http://www.lawref.com/lawref/
http://www.lawref.com/lawref/eeg/eeg.html
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