Subject: RE: Valves & related fun, '71 Ambo
Author: Kevin Graf
Date: Sep 12, 2003, 10:32 AM
Post ID: 1714498414
ON top of what Joe is saying I would suggest getting some True Blue. Putting
some on the seat will tell you where the valve is sitting on the seat(high
or low) and the width of the sealing surface. Do this after a light lapping.
Anouther thing I do is once everything looks ok, I put the valve in,hold the
valve with your thumbs then fill the chamber with water, gasoline, whatever.
Check for leaks, I usually count to 10, 1mississippi, ect. If nothing leaks
out until after 10, you got a pretty good seal. Even close to the count of
10 is pretty good.
Make sure there is still beef between the face(bottom) and the
margin(angle)Is it the margin? hmmm.. don't remember. Anyways it shouldn't
be paper thin.
-----Original Message-----
From: Sean Flanagan [mailto:sean-@theriver.com]
Sent: Friday, September 12, 2003 10:45 AM
To: Loopfram-@topica.com
Subject: Valves & related fun, '71 Ambo
Hello all and TGIF-
In the recent past I've made some inquiries here and received piles of help
for getting my '71 Ambo back in running order. Thanks again for all of the
assistance so far! It's been fun & educational, to say the least.
After getting the timing nailed down last night, I took her for her longest
run yet, a few miles down the road & back. Doesn't run well, but she
runs! Back in the garage, I noticed that the right cylinder cover was hot,
but touchable, the left cylinder cover was sizzle-your-skin hot!
So I thought, bad valve(s), letting hot combusted gasses in there and
generally cooking it. Also did a "workingman's leakdown test", kept the
plug in and turned the crankshaft via the bolt on the front. At TDC I
could definitely hear air coming out with a Pffft! sound, and I'm fairly
sure it was the intake side. But at this point I'm willing to do both
valves on that side.
Anyway, long story long, I want to replace the valves. This is the 1st
time I've ever done this, so I'm not sure what sort of tool I need to
compress the valve spring. And of course, your experiences & advice this
area would be greatly appreciated.
Thanks in advance
Sean in Flagstaff, AZ, USA