Does a turbo really need that much oil?
10-26-08, 12:07 AM
#1
Does a turbo really need that much oil?
Apparently so!
The bearings on the left have possibly hundreds of thousands of miles on them, and were replaced by the bearings on the right about 15k miles ago....
The originally bearings were in decent condition but I bought a rebuild kit because it was smoking a lot.
Well, the rebuild didn't help so then I did this (among other things): https://www.rx7club.com/single-turbo-rx-7s-23/ever-wondered-damn-all-smoke-coming-my-motor-turbo-793269/
Well, that lasted for about 700 miles (running with it restricted JUST enough for it not to smoke).
And the banks upgraded compressor wheel with 15k miles on it:
And the exhaust turbine got chewed up because BOTH exhaust sleeves went though the turbo (melted):
This was all that was left of BOTH exhaust sleeves:
So now the old (but still decent) bearings are back in.
But honestly, thats not even why I took it off. I took it off because the was a crack in the custom turbo manifold, it was still boosting 10lbs with all the above destruction plus a large crack.
The bearings on the left have possibly hundreds of thousands of miles on them, and were replaced by the bearings on the right about 15k miles ago....
The originally bearings were in decent condition but I bought a rebuild kit because it was smoking a lot.
Well, the rebuild didn't help so then I did this (among other things): https://www.rx7club.com/single-turbo-rx-7s-23/ever-wondered-damn-all-smoke-coming-my-motor-turbo-793269/
Well, that lasted for about 700 miles (running with it restricted JUST enough for it not to smoke).
And the banks upgraded compressor wheel with 15k miles on it:
And the exhaust turbine got chewed up because BOTH exhaust sleeves went though the turbo (melted):
This was all that was left of BOTH exhaust sleeves:
So now the old (but still decent) bearings are back in.
But honestly, thats not even why I took it off. I took it off because the was a crack in the custom turbo manifold, it was still boosting 10lbs with all the above destruction plus a large crack.
10-26-08, 08:42 PM
#6
And no, I didn't know that was gunna happen, I did not cut off the oil completely, just turned it down enough to make it not smoke.... The problem was that the turbo was not smoking because of too much oil, it was probably smoking because the return was ABOVE the feed...
10-26-08, 09:23 PM
#7
Who installed your oil drain above your oil feed and why??
No problem, I try to entertain and inform :-)
And no, I didn't know that was gunna happen, I did not cut off the oil completely, just turned it down enough to make it not smoke.... The problem was that the turbo was not smoking because of too much oil, it was probably smoking because the return was ABOVE the feed...
And no, I didn't know that was gunna happen, I did not cut off the oil completely, just turned it down enough to make it not smoke.... The problem was that the turbo was not smoking because of too much oil, it was probably smoking because the return was ABOVE the feed...
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10-26-08, 09:41 PM
#8
i know you guys were hoping for a epic fail with a destroyed turbo, oil explosion, and a motor eating metal....but I've put about 800 miles on the thing with the valve and it seems to be working good. I kinda like the idea of being able to "crank up" the oil pressure when you know the turbo is fixing to get hot.
Glad to know it worked out in the end.
10-28-08, 02:15 PM
#9
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i know you guys were hoping for a epic fail with a destroyed turbo, oil explosion, and a motor eating metal....but I've put about 800 miles on the thing with the valve and it seems to be working good. I kinda like the idea of being able to "crank up" the oil pressure when you know the turbo is fixing to get hot.
, you beat me to it!At least you got some cool carnage out of it, and can be thankful it didn't eat your motor! Some lessons are best learned first hand
.
10-29-08, 11:49 AM
#10
Another fourm member (who would rather remain unnamed) put this together for me, it was the only way to really make it work... but it didn't work too well obviously. We're trying something else now, we rotated the center part, but of the 4 bolts that bolt both the exhaust and compressor housings on, only 2 line up.... So it may leak oil terribly or just fly apart, who knows. I don't have a whole lot to lose at this point.
10-29-08, 12:53 PM
#12
The oil return on the motor side is fine, I have a T2 front cover.
Its the position on the oil return in relation to the feed on the turbo that I am having trouble with.
The turbo won't physically fit any other way, so we just rotated the center part 90deg, but were only able to use 2/4 bolts on each the front and rear of the turbo because the other 2 just didn't line up.
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