Turbo Rebuild Tips?
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Senior Member
Joined: Jul 2001
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Thanks UFB - I'll do that...
The return is the "standard" one from Alpine. It's like a 5/8" diameter that drains into the block right below the Turbo.
The two times I've removed the Turbo all the lines, oil and coolant, seemed to have had fluid in them. Well the oil drain had a little amount of oil, given it's curve and down slope there shouldn't be a lot of oil left in the drain by the time I let the engine cool.
The return is the "standard" one from Alpine. It's like a 5/8" diameter that drains into the block right below the Turbo.
The two times I've removed the Turbo all the lines, oil and coolant, seemed to have had fluid in them. Well the oil drain had a little amount of oil, given it's curve and down slope there shouldn't be a lot of oil left in the drain by the time I let the engine cool.
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C/Greg -
Sounds all good to me - do me a favour, when you removed the turbo, before you start stripping, hold the turbocharger upwards (let it sand on the turbine housing facing upwards) and then hold the shaft that the compressor wheel is bolted onto (silver impeller wheel) and pull it upward and push it downwards again --- check to see for play in the thrust washer and collar. there should be a very small amount of play across the center core (max 2mm).
Then check for play on the bushes - to do this you need to move the comp wheel left and right (still with the turbo faicng upwards) if there is alot of play here you will know that the bushes are shot.
Just for interest sake, if there is way to much play here the comp and turbine wheel will have touched the housings, you can check this on the side of the comp and turbine wheel blades - look for scorch marks.
Regarding your rebuild, I would not replace the bushes just yet as these take ALOT to wear! I would fistly make sure where the oil is leaking through before just going mad with replacing things.
I believe that your piston ring (this is the ring that looks and works like an engines piston ring) which is fitted onto the top of the turbine shaft to seal against the center core exit on the turbine housing side - this is more than likely worn out - the way you can check this is when you remove the shaft from the center core - there will be an oily deposit on the back face of the turbine shaft itself, also this oily deposit will more than likely be in the form of a carbonized residue.
Just some more things for you to check - hope that helps you a little.
Sounds all good to me - do me a favour, when you removed the turbo, before you start stripping, hold the turbocharger upwards (let it sand on the turbine housing facing upwards) and then hold the shaft that the compressor wheel is bolted onto (silver impeller wheel) and pull it upward and push it downwards again --- check to see for play in the thrust washer and collar. there should be a very small amount of play across the center core (max 2mm).
Then check for play on the bushes - to do this you need to move the comp wheel left and right (still with the turbo faicng upwards) if there is alot of play here you will know that the bushes are shot.
Just for interest sake, if there is way to much play here the comp and turbine wheel will have touched the housings, you can check this on the side of the comp and turbine wheel blades - look for scorch marks.
Regarding your rebuild, I would not replace the bushes just yet as these take ALOT to wear! I would fistly make sure where the oil is leaking through before just going mad with replacing things.
I believe that your piston ring (this is the ring that looks and works like an engines piston ring) which is fitted onto the top of the turbine shaft to seal against the center core exit on the turbine housing side - this is more than likely worn out - the way you can check this is when you remove the shaft from the center core - there will be an oily deposit on the back face of the turbine shaft itself, also this oily deposit will more than likely be in the form of a carbonized residue.
Just some more things for you to check - hope that helps you a little.
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Joined: Jul 2001
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CyberGreg,
ah, that's okay. Glad I could help out. I've bookmarked so many turbo sites it's scary. Unfortunately, my project is on hold, due to the new house, although I did find out the homeowners association (usually either really nice or really facist) allows minor maintenance of cars in the lot.
So I won't have to worry about renting a garage when I do get around to installing the turbo stuff.
Good luck, and let us know how it turns out.
ac
ah, that's okay. Glad I could help out. I've bookmarked so many turbo sites it's scary. Unfortunately, my project is on hold, due to the new house, although I did find out the homeowners association (usually either really nice or really facist) allows minor maintenance of cars in the lot.
So I won't have to worry about renting a garage when I do get around to installing the turbo stuff.
Good luck, and let us know how it turns out.
ac
