TD04 turbo smoking
Posted: Mon Aug 08, 2016 4:20 pm
Hello LegacyCentral.org, (I also posted this to reddit.com/r/subaru)
I picked up a 91 legacy SS with a TD04 waay back in January and am just now putting back together all the pieces to get it roadworthy, safe and legal. Unfortunately smoke pouring out of the hood scoop does not make for a very legal vehicle.
It seems that the car idles okay & drives around under vaccum just fine, but when the car goes under boost, the turbo itself starts to smoke, as well as under the uppipe's heat shield, as if oil was running down the uppipe. It then continues to smoke for awhile afterwards. It smells similar to burning oil. Here's what I've checked so far:
-power steering lines are not leaking onto the uppipe
-oil drain line is not leaking
-I replaced the banjo bolt gaskets for the oil feed & coolant lines
-CV boot is not flinging crud onto the downpipe (was worth a shot..)
-Right side valve cover gasket is not leaking onto headers
This is also not happening on a very high amount of boost. I'm running wastegate pressure which is about 5 PSI.
I'm also not sure how old the TD04 is, but judging by how old the exhaust gaskets were, I would say it's been on the car quite a while.
If anybody has anything else I can check or any other advice on this issue, it would be appreciated! All I can think of that is left is the seals on the turbo itself, which means rebuilding the turbo or replacing it.
Thanks!
I picked up a 91 legacy SS with a TD04 waay back in January and am just now putting back together all the pieces to get it roadworthy, safe and legal. Unfortunately smoke pouring out of the hood scoop does not make for a very legal vehicle.
It seems that the car idles okay & drives around under vaccum just fine, but when the car goes under boost, the turbo itself starts to smoke, as well as under the uppipe's heat shield, as if oil was running down the uppipe. It then continues to smoke for awhile afterwards. It smells similar to burning oil. Here's what I've checked so far:
-power steering lines are not leaking onto the uppipe
-oil drain line is not leaking
-I replaced the banjo bolt gaskets for the oil feed & coolant lines
-CV boot is not flinging crud onto the downpipe (was worth a shot..)
-Right side valve cover gasket is not leaking onto headers
This is also not happening on a very high amount of boost. I'm running wastegate pressure which is about 5 PSI.
I'm also not sure how old the TD04 is, but judging by how old the exhaust gaskets were, I would say it's been on the car quite a while.
If anybody has anything else I can check or any other advice on this issue, it would be appreciated! All I can think of that is left is the seals on the turbo itself, which means rebuilding the turbo or replacing it.
Thanks!