<VV> what, exactly, does this mean?
DTerry8123 at aol.com
DTerry8123 at aol.com
Sat Sep 10 09:31:05 EDT 2016
That's very interesting. My 1965 Corsa 140, had a light knock at idle for
years even after a rebuild in 1979. I never could find the source. After
about 30 years, the light knock turned into a very loud knock. It turned out
that I lost three adjacent teeth on the cam gear. It still ran! I had a
local club member find the problem. His take was that the main bearing closest
to the crank gear, had too much clearance. After replacing the bearing and
verifying the correct clearance, he installed an OTTO cam gear. The result
is that the engine has no knock and is quieter than it was when I bought
the car in 1966.
Dan Terry
1965 Corsa 140 coupe. 193,000 miles
In a message dated 9/10/2016 8:51:42 A.M. Eastern Daylight Time,
virtualvairs at corvair.org writes:
Randy- On my 140 that I drove for many years.... there was a odd, slight
thunking noise that could
usually be heard at idle.... Since I knew the guy that had put the engine
together, I asked him about it, and he said he didn't know, it was a
mystery, and had always done that. I didn't worry about it anymore and drove it
for a very very long time. When it came time to rebuilding it, I discovered
what that noise was. The cam gear had been sliding back and forth on the
key way, and because of the helical gear teeth giving a slight thrust, it
would cause the gear to slide forward and hit the bellhousing, and then be
driven back to hit the case, causing a "donk a donk, donk a donk" type noise
that could only be heard at idle. Moral of the story is the cam gear got
loose, probably from not being pressed on correctly, but in my case, and
yours, no harm no foul!! When its time to put the engine back together, be
carefull about installing the new gear. I really like those OTTO cam gears even
though they are total over kill, just more insurance that the engine wont
have to come
apart again any time soon!!
Kevin Nash
63 Turbo, EFI daily driver
More information about the VirtualVairs
mailing list