I've heard old harmonic balancers can let loose when the rubber deteriorates
(kind of like an original fan blade releasing...). Maybe your harmonic
balancer is just plain wore out.?.? Take off the belt, grab the pulley (to the
extent you can) and see if there is excessive play. If so, time for a new one
or reconditioning.
As an aside, when I redid my 261 inline, I installed a Pontiac harmonic
balancer. It was about the same price as reconditioning an original harmonic
balancer, supposedly has better dampening characteristics, looks good, and has
two pulley grooves (in case I want to add power steering or AC down the road).
The Pontiac balancer does require slight machining to work on the crank (the
third grove is cut off and the back side is shaved back).
Good luck!
Allen in Seattle
'50 3100
>>> "Joe Clark" <jclark1@utk.edu> 09/08/99 05:58AM >>>
Two questions for the group:
Does anyone have a good method for adjusting the mixture on a
Rochester B carb? I've used a vacuum gauge as the book
suggests but when I open up the mixture, the vacuum increases
slightly but then stays the same no matter how far you loosen it
(21 psi). Where in that range should I stop?
Also, I have a little front-to-rear wobble in my harmonic balancer
(about 1/4 inch). The radiator is already installed and it's kind of
hard to get to so I was wondering if I should leave well enough
alone or take it off and try to re-mount it. The engine times out well
and runs great otherwise so I don't think the crankshaft is bent.???
Thanks in advance,
Joe
Joe Clark
Southern Appalachian Field Laboratory
USGS/Biological Resources Division
Knoxville, Tennessee
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
|