Burning rear turbo bearing (hot side)
#1
Burning rear turbo bearing (hot side)
Hmm.. I seem to be having an issue where I'm doing some not-so good things to the turbo bearing on the hot side.
Last 2 bearings, the oil has seemed to be dark on that bearing.
I'm running an oil feed from a stock turbo feed port on my block to a 6an line. That goes into a very large filter, and outputs to a 4an line to the turbo.
No restrictors in the line. Oil flow during cranking looks good, fills a 1/4 quart very quickly.
I just went to a t3 .60/.63 water cooled garret turbo. After about 180 miles, it feels like it's starting to get loose again. I'm going to open it up and look at the bearings, but I suspect it's the same hot side bearing failure.
EGTs under control.. 1350 peak, 950 cruise. Measured immediately after #4 exhaust port.
Oil pressure reads good, 25psi idle to 70psi running. This isn't measured at the turbo, but at the standard oil port on the other side of the block.
To debug oil problems - and I'm assuming this is still an oil problem - what do you guys recommend? Perhaps an in-line pressure gauge at the turbo feed?
Last 2 bearings, the oil has seemed to be dark on that bearing.
I'm running an oil feed from a stock turbo feed port on my block to a 6an line. That goes into a very large filter, and outputs to a 4an line to the turbo.
No restrictors in the line. Oil flow during cranking looks good, fills a 1/4 quart very quickly.
I just went to a t3 .60/.63 water cooled garret turbo. After about 180 miles, it feels like it's starting to get loose again. I'm going to open it up and look at the bearings, but I suspect it's the same hot side bearing failure.
EGTs under control.. 1350 peak, 950 cruise. Measured immediately after #4 exhaust port.
Oil pressure reads good, 25psi idle to 70psi running. This isn't measured at the turbo, but at the standard oil port on the other side of the block.
To debug oil problems - and I'm assuming this is still an oil problem - what do you guys recommend? Perhaps an in-line pressure gauge at the turbo feed?
#2
Re: Burning rear turbo bearing (hot side)
We've seen -4an still manage to be pretty big and recommend a 1/16" restrictor for the feed. I would check your oil dump and see if it is nice and flowing not to mention within 30* of vertical. Also, your EGT probe should be on the THIRD runner not 4th.
JP
JP
#3
Re: Burning rear turbo bearing (hot side)
Originally Posted by samson
We've seen -4an still manage to be pretty big and recommend a 1/16" restrictor for the feed. I would check your oil dump and see if it is nice and flowing not to mention within 30* of vertical. Also, your EGT probe should be on the THIRD runner not 4th.
JP
JP
Oil dump is 1/2" ID, vertical, I can stick something under it, but it's positioned very well and has no sharp bends.
This is a 22RE, inline 4. #4 is where I'd expect the highest temp to be.
#6
Re: Burning rear turbo bearing (hot side)
Originally Posted by dcg9381
Better than the last one.... The question(s) still stand, however..
all i can think of is, your block doesnt have enough feed to get to the turbo. tee off of the sending unit hole, plug oem turbo feed
#7
Re: Burning rear turbo bearing (hot side)
Originally Posted by c0mpl3x
yeah, but you aren't the only one with a new manifold!
all i can think of is, your block doesnt have enough feed to get to the turbo. tee off of the sending unit hole, plug oem turbo feed
all i can think of is, your block doesnt have enough feed to get to the turbo. tee off of the sending unit hole, plug oem turbo feed
On your manifold, my only conern would be clearance with the stock distributor and power steering assembly if you still have one...
I've thought about doing what you suggest... A lack of oil flow would do it... Was wondering if oil pressure can and should be measured at the turbo itself?
#8
Re: Burning rear turbo bearing (hot side)
no PS so im good, you could always switch the pressure sensor with the oem feed, and just lube it from sensor feed.
doesn't matter if you have 1500psi getting to the turbo, if you can't flow anything more than a few drops, which that big filter looks to be hogging any volume that you're getting across the line
doesn't matter if you have 1500psi getting to the turbo, if you can't flow anything more than a few drops, which that big filter looks to be hogging any volume that you're getting across the line
#9
Re: Burning rear turbo bearing (hot side)
Originally Posted by dcg9381
Better than the last one.... The question(s) still stand, however..
I'm an idiot, that's why. I don't know WHY you have a inline filter, but I'm agreeing with c0mpl3x and that could be holding things back a little bit. Then again you said it filled a container rather quickly so I'm not quite sure.
I have a question for you. Pics of your oil dump off of your turbo. Just curious on how you ran that on account of it appears you made your very on oil lines and I want to see how you mounted it on the turbo itself.
Sorry I couldn't be too much help and I apologize for the previous n00b answer; HOWEVER, common runner is #3 for an EGT probe this I'm sure of (atleast for Honda exhaust manifolds). Don't know HOW big of a difference it will make (probably minimal) in the overall case of things and your max temp is far from severe.
JP
#10
Re: Burning rear turbo bearing (hot side)
Originally Posted by samson
I'm an idiot, that's why. I don't know WHY you have a inline filter, but I'm agreeing with c0mpl3x and that could be holding things back a little bit. Then again you said it filled a container rather quickly so I'm not quite sure.
I had these issues before I had a large inline filter also.
Originally Posted by samson
I have a question for you. Pics of your oil dump off of your turbo. Just curious on how you ran that on account of it appears you made your very on oil lines and I want to see how you mounted it on the turbo itself.
http://Sorry I couldn't be too much help and I apologize for the previous n00b answer; HOWEVER, common runner is #3 for an EGT probe this I'm sure of (atleast for Honda exhaust manifolds). Don't know HOW big of a difference it will make (probably minimal) in the overall case of things and your max temp is far from severe.
I don't think it matters if the probe is on #3 or #4.
I'm still hunting as to why I'm burning turbo bearings.. I'm probably going to put a mechanical oil pressure gauge on that inlet and see what happens.