<VV> Burning oil

[Dale Dewald]

Hello Robert,

I had this same issue on the 86k mile (factory original, never apart) 
110/PG engine in my '67 500 when I purchased it 3 years ago.  The PPO had 
installed dual exhaust so I could tell the smoke was from the right side. 
The PO had recently rebuilt the carbs (a diesel mechanic who seemed to know 
what he was doing) so I didn't consider them as a primary suspect. At first 
start up cold the engine ran clean.  It took about 2 minutes of idling to 
when the chokes opened and the fast idle cams disengaged for the smoke to 
appear.  If at this point the transmission was dropped in gear and I took 
off, a mosquito cloud of blue smoke would pour out the right side.  There 
was no noticeable smoke while at speed or when hot but the smoke would 
return as the engine cooled while idling.

I traced this problem for quite a while--compression test, ignition, vacuum 
leaks, etc--nothing.  I did find that the idle circuit would occasionally 
plug up on the right side and could not be adjusted properly. I could 
correct this for a while by removing the mixture screw and spraying in some 
carb cleaner--but the right side always ran rough at idle and the smoke 
persisted. I eventually got tired of this and installed a pair of known 
matched rebuilt carbs.  I was able to finally get a smooth idle with even 
firing on both sides. The smoke persisted for a few more days of daily 
driving, then gradually went away!!  The engine has since been running 
clean for two years now.

I think that the persistent lean misfire at idle combined with moderate oil 
consumption (86k on original rings) caused the rings on the right side to 
carbon up.  Once the mixture problem was solved and the cylinders were 
firing properly, the carbon was blown out and proper oil control was 
re-established.

Try swapping carburetors from side to side to see if the problem follows.

Morale: Never trust PO rebuilt carbs!

Dale Dewald
Hancock, MI

At 12:00 9/08/2012 -0400, Robert Paul wrote:
>Hi again car can be parked on any angle, always on the driver side.  New 
>rings, pistons, valves and seals.  valve seats both inttake and exaust 
>have been swapped.  Pulled the plugs and none show more burning than 
>another.  Had a high volume oil pump then swapped it out for th old oil 
>pump.  Seams to burn less oil ( Lots of smoke idle, seams like very little 
>when aclerating). Engine has to warm up slightly for clouds of white smoke 
>to show up ( maybe 2 - 3 minutes).  How about oil return blockage??????