Brake boosting and blown turbo seal?
#1
Brake boosting and blown turbo seal?
So I was break boosting my stock twins on the freeway in 3rd and as soon as a shift to 4th I see SMOKE everywhere behind me. When I pull over I see oil on the ground (turbo side)
Are my turbos really blown or is it just a rebuild on the seals?
Are my turbos really blown or is it just a rebuild on the seals?
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#8
Racecar - Formula 2000
Oil on the ground? Doesn't sound like a turbo SEAL failure (usually lots of smoke out the exh, oil in intake system, but little oil leakage externally) to me. More like a turbo oil supply-line problem.
Dave
Dave
#10
Racecar - Formula 2000
Might be a PCV problem...
Link: https://www.rx7club.com/showthread.p...ht=pcv+problem
Dave
#11
lol that thread is more or less scaring me into thinking its the oil control rings which is what I first thought. But I kept thinking along the lines of the turbos because of the turbo side leakage, oil everywhere BOV intake box, turbo side of hood, and under the turbos.
Those symptoms made me think oil supply line, then of course the smoking.. smoking throws me off.. maybe its a combination of oil supply line and busted oil control ring... I hope not.
Those symptoms made me think oil supply line, then of course the smoking.. smoking throws me off.. maybe its a combination of oil supply line and busted oil control ring... I hope not.
#12
Moderator
iTrader: (7)
Now that I think about it there are many other ways to have less that 8lb of boost. It's just that a boost leak is the most common. Air pump has nothing to do with it.
Pull your intercooler inlet hose and if there is a puddle of oil down at the bottom, you probably have a turbo problem. If there isn't much oil there, start looking at other parts of the engine. PCV is a good idea.
Pull your intercooler inlet hose and if there is a puddle of oil down at the bottom, you probably have a turbo problem. If there isn't much oil there, start looking at other parts of the engine. PCV is a good idea.
#13
Well, I think I found the problem as I pulled the downpipe out today. Secondary impeller unit almost fell out with it. Dp leaked a lot of oil and seems like my impellers spun themselves off... anyway, what about a ACV for a leak source? Could that have been the problem that led to my over boosting?
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