Hi All;
For all of you who have followed my posts on this topic over the last 13 months, I think that we are finally at the solution...
The 327/340 for my SWC was put together in January of 2006 after complete machining of the block, crank, and heads. This was done by a very reputable shop here in NJ. From the get go the thing produced oil smoke at idle, pretty much out of one side of the engine. Many posts to this board which resulted in some very good suggestions and advice. Needless to say we went through all the typical drills, check the heads, the intake seating, etc.. I even pulled the motor a second time, sent it back to the shop for a second tear-down and rebuild only to have it smoke again after only about 50 miles!
Right after Christmas I brought this smoker back to the shop again for another look. By this time it was burning a quart every 200 miles as close as I could figure. Their call was to pull the motor again (3rd time mind you!), so I dropped it off in January.
Yesterday, (actually Tuesday) they put the motor on the dyno to see what is happening... As I suspected, they find problems with valve seals. They take the worst two cylinders and replace the seals and run it again. Funny, but those two cylinders clean up! So they take the motor down and replace all the seals with what they described as a "higher quality" seal and guess what, no more smoke!
Here's the explanation for what it is worth, maybe I can save someone else a pile of time and money.
What I am told is that currently there is considerable flux in the parts industry; problems with quality and things like adhearence to specs, etc.. They contacted the manufacturer of the new cam (Competition Cams) who basically tells them that their new design solid lifters pump more oil into the tops of the heads than did the original design; not a lot, perhaps 5-10% more than the original design. They also tell the shop that in "rare" situations, this extra oil flow will create a problem with "standard" (I guess) valve seals. I guess I was one of these "rare" situations.
I'm heading out in a few minutes to pick the motor up again to hopefully get the car back together this coming weekend. Please keep your fingers crossed!
Joel
PS, I went back through my posts on this topic since last January and there were at least one or two of you who nailed the problem (in hindsight)!! Thanks again to all for all members for your help...
For all of you who have followed my posts on this topic over the last 13 months, I think that we are finally at the solution...
The 327/340 for my SWC was put together in January of 2006 after complete machining of the block, crank, and heads. This was done by a very reputable shop here in NJ. From the get go the thing produced oil smoke at idle, pretty much out of one side of the engine. Many posts to this board which resulted in some very good suggestions and advice. Needless to say we went through all the typical drills, check the heads, the intake seating, etc.. I even pulled the motor a second time, sent it back to the shop for a second tear-down and rebuild only to have it smoke again after only about 50 miles!
Right after Christmas I brought this smoker back to the shop again for another look. By this time it was burning a quart every 200 miles as close as I could figure. Their call was to pull the motor again (3rd time mind you!), so I dropped it off in January.
Yesterday, (actually Tuesday) they put the motor on the dyno to see what is happening... As I suspected, they find problems with valve seals. They take the worst two cylinders and replace the seals and run it again. Funny, but those two cylinders clean up! So they take the motor down and replace all the seals with what they described as a "higher quality" seal and guess what, no more smoke!
Here's the explanation for what it is worth, maybe I can save someone else a pile of time and money.
What I am told is that currently there is considerable flux in the parts industry; problems with quality and things like adhearence to specs, etc.. They contacted the manufacturer of the new cam (Competition Cams) who basically tells them that their new design solid lifters pump more oil into the tops of the heads than did the original design; not a lot, perhaps 5-10% more than the original design. They also tell the shop that in "rare" situations, this extra oil flow will create a problem with "standard" (I guess) valve seals. I guess I was one of these "rare" situations.
I'm heading out in a few minutes to pick the motor up again to hopefully get the car back together this coming weekend. Please keep your fingers crossed!
Joel
PS, I went back through my posts on this topic since last January and there were at least one or two of you who nailed the problem (in hindsight)!! Thanks again to all for all members for your help...
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