Oil in TMIC y-pipe
23 December 2016, 10:33 PM
#1
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Oil in TMIC y-pipe
So I managed to get my hands on a second hand STI tmic which I intend to fit in the near future. However, the inside of steel y-pipe and turbo hose are drenched in oil, and by that I don't just mean a light film of oil, I mean enough to trickle into a small pot.
I'm not sure why this would be but I just want opinions on whether or not I need to get the y-pipe hoses and intercooler completely oil free before fitting.
I'm not sure why this would be but I just want opinions on whether or not I need to get the y-pipe hoses and intercooler completely oil free before fitting.
23 December 2016, 10:44 PM
#2
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The breathers for the cams and crank are put back into inlet which can cause this. Best to clean out first. I as well as others use an oil catch can that eliminates this.
24 December 2016, 08:49 AM
#3
As above. A catch can will eliminate it, but a small amount of oil is normal, and if the car is running extra boost and being driven hard then you can get quite a bit of oil in there. This can then pool into the throttle body if the car is standing a while and give a cloud of smoke when it starts up.
24 December 2016, 11:05 AM
#6
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Thanks folks, I'll give it a good clean with some brake cleaner before it goes on, and now I understand the purpose of an oil catch can. Two birds, one stone.
24 December 2016, 11:23 AM
#7
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As above. A catch can will eliminate it, but a small amount of oil is normal, and if the car is running extra boost and being driven hard then you can get quite a bit of oil in there. This can then pool into the throttle body if the car is standing a while and give a cloud of smoke when it starts up.
And this is exactly why my 07 STI now has a Mocal catch can fitted.
Nice brushed aluminium piece with decent welds and good quality fittings.
It also has a sight tube on one side to show the level of what it's caught.
It fits perfectly to the left hand side of the fuse box - this space became free when I had my secondary air pump deleted on engine rebuild.
Last edited by Hawkeye D; 24 December 2016 at 11:28 AM.
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24 December 2016, 11:59 AM
#8
And this is exactly why my 07 STI now has a Mocal catch can fitted.
Nice brushed aluminium piece with decent welds and good quality fittings.
It also has a sight tube on one side to show the level of what it's caught.
It fits perfectly to the left hand side of the fuse box - this space became free when I had my secondary air pump deleted on engine rebuild.
Nice brushed aluminium piece with decent welds and good quality fittings.
It also has a sight tube on one side to show the level of what it's caught.
It fits perfectly to the left hand side of the fuse box - this space became free when I had my secondary air pump deleted on engine rebuild.