I wrote a few weeks ago after replacing piston rings and rod bearings. That
repair seems to be good - so far. This past weekend I drove 100 miles to a
car show and it seemed to run okay but the fuel economy was poor. Then I
discovered that my oil level was very low. I topped up and checked it again
on my return (100 miles) and discovered that I had burned 2 quarts! It did
not leak out. A compression test showed 0 lbs on cylinder 6. That's where
the oil went. #6 plug was caked with oil and soot as well. Thinking I had a
head gasket failure or new piston ring installation errors I removed the head.
The gasket looked good, nothing obvious, and the cylinder walls looked good.
Thinking that the head must not have been torqued properly, I began cleaning
my tools and shop for the next day. Then I noticed a gaping hole in the #6
exhaust valve. I removed it and there is a 5/16'' chunk missing! My question
is what could have caused that? During the previous work I removed the head
and inspected and cleaned all valves and lapped them into their seats. They
looked good then. I plan to drive to Triumphest and need to know what
happened so that it doesn't happen again.
Thanks,
Art Graves
Tulsa, OK
1976 Triumph TR6
_______________________________________________
Support Team.Net http://www.team.net/donate.html
This list supported in part by the Vintage Triumph Register
http://www.vtr.org
Triumphs@autox.team.net
http://autox.team.net/mailman/listinfo/triumphs
http://www.team.net/archive
|