Turbo seal leakage
03-20-2008, 09:12 AM
#1
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Turbo seal leakage
Hi!
I need your opinion.
Last summer I let a "performance shop" install my GT28R turbo set up. I noticed that I have some oil leakage in my downpipe. I've check the oil feed and there were no oil restrictor in there (-4an)
My pressure runs between 20 to 80 psi.
So I will put a 0.035 to 0.04 restrictor there. Thanks for that thread: https://www.miataturbo.net/forum/sho...r+turbo+1%2F16
My turbo drain tube is a 3/8 inches and it is not clogged
My question: If my seal has been leaking for couple months, does it mean it is dead or should it works fine after my "mods".?? I heard that they don't usually "break".
Thanks!
BTW I will plug the pcv port on the intake and run a "vaccum" at the pcv port on the valve cover going to the turbo inlet (threw a catch can)...I don't want a pressurized crankcase anymore!
I need your opinion.
Last summer I let a "performance shop" install my GT28R turbo set up. I noticed that I have some oil leakage in my downpipe. I've check the oil feed and there were no oil restrictor in there (-4an)
My pressure runs between 20 to 80 psi.So I will put a 0.035 to 0.04 restrictor there. Thanks for that thread: https://www.miataturbo.net/forum/sho...r+turbo+1%2F16
My turbo drain tube is a 3/8 inches and it is not clogged
My question: If my seal has been leaking for couple months, does it mean it is dead or should it works fine after my "mods".?? I heard that they don't usually "break".
Thanks!
BTW I will plug the pcv port on the intake and run a "vaccum" at the pcv port on the valve cover going to the turbo inlet (threw a catch can)...I don't want a pressurized crankcase anymore!
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03-20-2008, 10:45 AM
#5
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in addition to what you want to do, i would pop the housing off and clean all the oil residue and reassemble it and see if it still leaks, you may not need a new one
Whats if its not the lack of restrictor causing the oiling but rather the pressurized crank case not letting oil drain properly?
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at 25$ each!
03-20-2008, 05:55 PM
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Update!
???I removed the turbo, ext. wg, exhaust manifold this afternoon and surprise!!!
At first I thought my turbo was leaking some oil and this is why there was a crust of carbon in my downpipe:
But my turbo was pretty clean with no oil around the turbine and in the "exhaust of the wastegate":
But look at the carbon builup at the exhaust side of the head?!?(3mm narrower than on the exhaust manifold (Begi log style))...no carbon buildup in the exhaust manifold, in the turbo...but a lot of carbon crust in the head and downpipe
I rebuild my engine last year, overbore it to a 1.9L, pauter rods, wiseco pistons, reroute, standalone SDS, 12.1 A/F at WOT, 14-15 on cruise, RC injectors, compression 180 all the board (cold, checked yesterday)
What the f**k is goin' on?!?
Any ideas, help appreciated. I think I will need to remove the head and make it cleaned...
Serge
At first I thought my turbo was leaking some oil and this is why there was a crust of carbon in my downpipe:
But my turbo was pretty clean with no oil around the turbine and in the "exhaust of the wastegate":
But look at the carbon builup at the exhaust side of the head?!?(3mm narrower than on the exhaust manifold (Begi log style))...no carbon buildup in the exhaust manifold, in the turbo...but a lot of carbon crust in the head and downpipe
I rebuild my engine last year, overbore it to a 1.9L, pauter rods, wiseco pistons, reroute, standalone SDS, 12.1 A/F at WOT, 14-15 on cruise, RC injectors, compression 180 all the board (cold, checked yesterday)
What the f**k is goin' on?!?
Any ideas, help appreciated. I think I will need to remove the head and make it cleaned...
Serge
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i don't think that it will hurt the head too much other than being dirty 
