In <199710150422.XAA25909@mars.tecinfo.com>, Tyson Sherman wrote:
>Hi folks. I'm trying to adjust the valves
>on my B. I adjusted them (cold)
>so that a .015" would go thru and a
>..017" wouldn't (cold) and they are
>noisier than before.
>Before I had a few noisy (clatter) ones.
>Now they all clatter.
>What's the secret to doing this right?
>How quiet should the valvetrain be?
Noise is good. Quiet is not. Here's the deal: If the clearance is
too slim, one could get valve wear and seat erosion to the point that
the valve is not closing completely. The exhaust valve is cooled by
its periodic contact with the (water-cooled) head. If the exhaust
valve is not allowed to cool, we talking toast here. A little noise
is cheaper than new valves (and possibly new pistons).
There is one exception to this--if you have a lot of wear, your noise
could be made worse by loose rockers. If you listen with a
stethoscope, this has a characteristic double tick kinda racket. You
can get your shaft ground and rockers rebushed at Rocker Arm
Specialists (listed in the Monster List) for about $75. A good deal,
excellent workmanship.
A. B. Bonds
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