Subject: Re: Odd behavior
Author: Martin Cooke
Date: Apr 25, 2001, 8:47 AM
Post ID: 1706464883
Maybe the pushrod wasn't seated properly when you first set clearance.
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----- Original Message -----
From: "Bruce Giller" <bgil-@mitre.org>
To: "loopframe" <Loopfram-@topica.com>
Sent: Monday, April 23, 2001 8:18 PM
Subject: Odd behavior
| ============================================================ Achieve email health, harmony, and happiness. Sign up for a free My Topica account and organize your email subscriptions so they go with your flow. Sign up today. http://click.topica.com/caaabDnb1dfltb2mMM1a/register ============================================================ This winter, my Guzzi projects were to get a new backrest and replace all the gaskets/O-rings for both cylinders. My larger and much improved backrest backing plate is with Rich M. getting the royal treatment only he can produce (my seat was rebuilt by Rich and my wife and I didn't get a sore butt on our trip out West last year with 10 hour days). Then it was on to yanking off the cylinders and replacing the gaskets. I had a look at the valves and got new guides and exhaust valves installed and put everything back together. Now for the fun part.... The left cylinder was all fitted up, then on to the right. The valve adjustment for the right exhaust valve was so much different than the intake, I rotated the engine over again and used the distrib. rotor to tell me that I was at TDC on the compression stroke and the adjustment was just the same. I even measured the push rods to make sure that one didn't shrink on me. Thinking that all was ok, I adjusted the valve to the proper dimension and then button everything up. I rotated the rear wheel with the bike in gear to make sure that I didn't adjust the valves incorrectly. Rotate, rotate, rotate, CLUNK, rotate, rotate, rotate, rotate. What was that loud CLUNK all about??? Suspecting the left cylinder, I opened it back up and found that the was now a 1/4" gap on the exhaust valve where there used to the the stock setting! Resetting the valve to the proper setting and rotating the rear wheel brought about no new CLUNKs. And starting it up later did not produced any 'really loud noises that shouldn't be there'. My guess is that the cam follower on the exhaust valve had gotten hung up with I was rotating the engine when putting the cylinders back on. I did this so that it was easier to get the piston back in the cylinders with the pistons at the their highest point. But what it gotten hung up on, I've no idea. Do cam followers go bad on these bikes?? Mine has 33k miles on it. Bruce '72 Eldo |