Bad turbo?

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

alright guys im currently undergoing an sr swap and i examined the turbo. there is oil in the compressor elbow and also the wheel. i cleaned both out but this morning the oil reappeared in the elbow. how major is this and what will i have to do to fix it? thanks guys

Post by **Hijacker** » Sat Dec 27, 2003 6:53 am

sounds like the bearing housing (center part) will need to be rebuilt. One of the oil seals is busted. i'm not sure if ball bearing housings can be rebuilt or not. if it's the stock T25, you should be able to pick up an extra one off the boards somewhere

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

how hard is it to rebuild. there's a kit on ebay for a t25 rebuild. is it worth it? or is buying an new t25 better to buy

Post by **SpeedRacer1** » Sat Dec 27, 2003 6:53 am

Run it first to see if things are really broken.

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

if the engine is out of the car its much easier to replace the turbo right? i just wanted to do this the easiest way.

Post by **Hijacker** » Sat Dec 27, 2003 6:53 am

yes. the turbo will be easier to replace with the engine out of the car. as for the rebuild, i'm not sure. i've never rebuilt a turbo before, but from what i understand, it's not an easy task.

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

alright i just pulled the turbo and turned it on its side and lots of oil started to leak from the shaft on the compressor side and also through the air outlet hole on the compressor side(whatever it called). this i belive is a bad thing but how bad is it?

Post by **f150intally** » Sat Dec 27, 2003 6:53 am

you should replace it... Also, did it come with any kind of warranty?

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

on internals only

Post by **tazjig** » Sat Dec 27, 2003 6:53 am

I have a sr with oil in the turbo also, but i read another thread where they said that if your engine has been sitting on the turbo side for a while then that could be the cause, and i know when i picked my engine up that is how it was. So what would be the easiest way to test the turbo? because i cant drive it because it is parked for the winter?

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

mine was in a clip. im sure its bad. there was some good leakage coming from the compressor side shaft.

Post by **Bluefire** » Sat Dec 27, 2003 6:53 am

Hmm im in the same situation too... My RB clip only has 38,000 km on it. I checked for shaft play and it feels solid. Left and right, in and out all feel nice and tight. The compressor also spins very smoothly. So how can you tell if an oil seal is bad?

-Bluefire

Post by **martin** » Sat Dec 27, 2003 6:53 am

Here's a suggestion...- take the turbo off- clean all the oil out thoroughly using solvent.- pump oil into the oil gallery using an oil can, and keep the outlet plugged with your finger or better still a fitting.- pump as much pressure as you can with the oil can- see if any leaks into the compressor housing.

Now I know you won't be able to pump 60psi with an oil can, but it'll give you some idea if the seal is really bad!

Other than this, I can't think of any way to check it other than run the motor.

-Martin.

Post by **compression** » Sat Dec 27, 2003 6:53 am

Are you blowing oil out the exhaust side at all? Then you know its coming out both sides. In some cases it is better to get your turbo rebuilt by pro at say...innovative turbo. Or You can pick up a whole new T25 for pretty cheap, but ther is no gaurantee that it will be good. It may be a good time to upgrade your turbo to an S14 or S15 one also. You have options.OR, you can just run it as it is and keep a close eye on your engine oil level and be prepared to see thick black sticky soot coating the inside of all your intercooler pipes, intercooler, throttle body, and intake manifold.good luck

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

damn good info, ill try that.

Post by **Movingviolation240** » Sat Dec 27, 2003 6:53 am

I've never seen a turbo loose the front oil seal. It's always the back one that goes first (due to the high heat back ther). Could it be leaking down that stupid rubber bellow from the crank vent? I've seen a few guys think they got a blown turbo when that was really the cause.

Also what kinda shaft play are you experiencing. Both in and out and side to side.

I'd look into that before you blow money on a turbo.

Paul

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

very minor shaft play up and down on the compressor side

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

also, oil is coming from the compressor side shaft and the outlet pipe only. no oil coming from the exhaust housing area. what and where are the oil gallery and crank vent? is the crank vent the hole in the block under the turbo? if it is there is no leak there.

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

another quick question- when i took the turbo off the engine and turned it so the compressor was facing down, a good amount of oil came out the compressor wheel-shaft area and the air outlet. what can this mean. is this natural b/c the turbo is turned up side down? i truly appreciate your guys' help. thanks

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

Post by **martin** » Sat Dec 27, 2003 6:53 am

The crank vent is the black box with two hoses going to it at the back of the valve cover above the turbo. The reason this is relavent is that the hose coming out of it goes into teh turbo inlet hose, this will sometime allow oild to get into the compressor sdie of the turbo. This oil under operting conditions will be in teh form of a mist and as a result of too much blow by on piston rings. The other way oil can get into the turbo through this vent pipe is if the engine has been layed down on it's side. this often happens during shipping, the topple over. The oid will then run through teh vent system into the turbo copressor.Now you have said that yours was a clip, so I find it difficult to believe that it was shipped on it's side, or fell over! But I can't think of any other way that oil, in those quantities, could get into the compressor housing... It' can't happen under operating conditions, there simply wouldn't be a pool of oil in teh turbo. Even if oil were rushing in through a complete worn out seal, it wouldn't stay there, it would get pushed through teh system and burnt in teh engine. Yes there would be a oily coating on all teh internal surfaces of teh IC piping, IC, and turbo housing, but not a pool.

Maybe your clip was shipped on it's side? Is that posisble? Did it have bodywork? Was it damaged? Are there any signs that the clip was sitting JDM passenger side down?

Anyway if teh shaft play is minimal, I;d say tryteh dammed thing, if there's that much oil you'll know reall quick if there a problem once it's running.

-Martin.

Post by **240dreams** » Sat Dec 27, 2003 6:53 am

the clips bodywork was messed up. it may have been possible. im just going to try the damn turbo out. i need transportation. Thanks a lot for the good info martin.

Post by **compression** » Sat Dec 27, 2003 6:53 am

Clean out the oil, drive it, then check the compressor side for oil a week or 2 later. If it has a lot of oil in it, then the seal is bad. If not, then keep drivin.good luck.

Post by **martin** » Sat Dec 27, 2003 6:53 am

240dreams wrote:the clips bodywork was messed up. it may have been possible. im just going to try the damn turbo out. i need transportation. Thanks a lot for the good info martin.

I'm glad you could read it, I really should learn how to type and spell one day :-)

-Martin.

Bad turbo?

Bad turbo?

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