I have a smoking problem
After I do a boosted run and come back to idle (say at a stoplight), the car smokes like crazy. I have done about 2000 boosted miles, and car has consumed about 3 quarts of 15W40 in that period, where earlier I needed to put in a quart every 3000 miles.
These things are out of the question: 1) Boost getting into crankcase and rings not sealing - Because I am running THIS valve in between a cheap autozone PCV and the intake manifold. The other vent on the valve cover is plumbed pre-compressor. 2) Leaking compressor seal - Because no oil in the hotside or coldside pipes. 3) Leaking turbine seal - Because no oil leaking out of CHRA 4) Low compression - Did a compression check, it came out 181/180/180/181. Could my PLUGS be telling me something? What do you guys suggest? |
Could also be valve stem seals.
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Smoking is bad for you...
I'd seriously recommend changing the oil and adding a bottle of "Engine Restorer" to the oil. It's like miracle in a bottle. I bet it fixes the smoking problem. I always get good results using this stuff. Even fixed my lawnmower from smoking! |
what size oil inlet line? what size restrictor? BB or journal?
it's either that, or your valve seal on #4 is bad, and why your plug looked the way it did. |
-3AN with banjo on both ends, WRX TD04 turbo journal bearing. In the stock subaru application this turbo comes with a 0.065" restrictor.
I put a set of clean plugs yesterday, will pull them today and see if #4 is still the way it was. |
Alright I just pulled my plugs, and its bad news: #4 is very very sooty and oily. The other 3 are normal.
So does that mean valve stem seals then? Do I need to pull the head to do this? I've never done hardcore 4-stroke work before.
Originally Posted by patsmx5
(Post 306642)
Smoking is bad for you...
I'd seriously recommend changing the oil and adding a bottle of "Engine Restorer" to the oil. It's like miracle in a bottle. I bet it fixes the smoking problem. I always get good results using this stuff. Even fixed my lawnmower from smoking! |
Originally Posted by The_Pipefather
(Post 306683)
Alright I just pulled my plugs, and its bad news: #4 is very very sooty and oily. The other 3 are normal.
So does that mean valve stem seals then? Do I need to pull the head to do this? I've never done hardcore 4-stroke work before. Yeah you can, you have to pressurize the cylinders. How many miles on the car? Might be a good time to pull the head, replace head gasket and maybe some diy porting. __________________ Best Car Insurance | Auto Protection Today | FREE Trade-In Quote |
154k on the clock.
I wonder if its worth it to swap in a good used engine. I want to prep my car for serious track work next year so I need something that wont keep breaking all the time. Even if I did the seals now it might be rings a few miles down the line.... |
haha, were in the same boat. https://www.miataturbo.net/forum/showthread.php?t=25670
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Engine restorer, or leakdown test. You fail if you pull the motor apart without doing a leakdown test first.
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whats the quickest way to do a leakdown? i dont have an air compressor at home.
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Originally Posted by The_Pipefather
(Post 306795)
whats the quickest way to do a leakdown? i dont have an air compressor at home.
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