So I'm having smoke issues with my '72 Dart 318 putting out a lot of smoke under heavy load and when letting off such as on an off-ramp. Smells like burnt oil and has a bit of a blue hue to it. Getting about 18 MPG and it pulls a steady 20 in Hg at idle (around 800 RPM) Oil 50psi @ 2000 RPM Pretty much stock besides dual exhaust. Any suggestions would be appreciated. Thanks.
Oil in exhaust
- Thread starter sdahmer
- Start date
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My uneducated guess would be piston rings. Also maybe valve seals??
Purple Haze
Well-Known Member
Do a compression test both dry and wet.
robert 68 cuda
Well-Known Member
do you have aftermarkit valve covers ?? if so did you put the baffle in the bottem?? i not valve seals/guides we might need a little more info .
newby
Well-Known Member
What kind of mileage are you at? May just be time to freshen up the 318.
1wild&crazyguy
Banned
if yu floor it and it smokes=rings
if you let off the gas and it smokes=valve stem seals
if you let off the gas and it smokes=valve stem seals
If wild&crazy diagnosis is correct, then valve stem seals should be an easy fix. Make sure you get the right seals though, there was a thread on here where someone got the wrong type. Good luck and keep us posted.
1wild&crazyguy
Banned
as long as the guides aren't toasted.
You could try looking at the pcv valve as well, most likely the seals.
You could try looking at the pcv valve as well, most likely the seals.
MOPARJ
What can I upgrade now?
If it is only on deceleration, you should also look into a leaky intake gasket. Pull all of the plugs and look for one that is somewhat oil fouled. If there is an intake leak, it will most likely be on the intake/exhaust port near that cylinder.
This has happened to me on a few occasions. If it smokes on acceleration, then it may be the rings after all.
This has happened to me on a few occasions. If it smokes on acceleration, then it may be the rings after all.
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