This is a classic description of bad valve seals and/or valve guides.
However, it might also be an example of what happens when valves are good
(new head) but the rest of the engine has been untouched. The result is
that the increased compression increases oil burning because the rings are
worn.
John McEwen
>Hello listees,
>
>Well, I'm trying whether to rebuild my engine or buy a rebuilt
>or do something in between, like just put in new bearings.
>Several people on the list have been very helpful so far and I
>am certainly grateful for their help.
>
>The big question is whether the car burns oil or not, the answer
>is *sometimes*, which is odd. Like tonite; drive to the burrito joint
>with my girlfriend, she runs in, while I wait in the car, maybe
>five minutes tops. I leave the engine running, oil pressure is
>30 lbs/sqin idling, the engine is up to operating temp. As soon as
>we go to pull away the biggest cloud of smoke starts coming out
>of the tail pipe. I thought the car was on fire for a moment there
>was so much smoke. I drive one block like this, smoke pouring out
>the back of the car and then the smoke vanishes and we are back
>to normal colorless exhaust.
>
>The head on this car is a 4 month old VB rebuild. The engine has been
>detoxed, it's a 1275, has a weber and a lcb header (in case that is helpful).
>
>What is that smoke?? Has anyone experienced anything like this? If
>I were burning oil or there was water (steam) in the exhaust, shouldn't
>that be constant?
>
>Thanks,
>
>Robert Weeks
>Durham NC
>1969 Midget
>http://www.woozy.com/midget/
|