filluptieu
11-23-2009, 06:35 PM
Alright guys, well I want to first say thank you for giving 5 minutes to check out my problem.
I have a s13 sr20det redtop t25, sidemount, greddy type s bov, 3 inch exhaust, xs power exhaust manifold.
She runs at 7 psi and no more. When I first got the car the turbo was blown and white smoke would come out the exhaust. I replaced it with another used t25 and at the same time removed the power steering to have a easier time. One week later the turbo starts locking up (I would boost some times and at other times it would not boost at all) So I check the turbo by taking off the inlet flange and the shaft play was crazy! And some of the outside fins were bent… Well no big deal, a good friend of mine gave me his t25 that has the tiniest shaft play, one of the best I have ever felt.
So I replaced the turbo and everything runs great! Spools great and everything minus one problem, theres a nasty exhaust leak from the rectangular flange that goes in between the manifold and the t25 (its acheap ebay cardboard flange). Well I then changed the flange to a metal one and it runs even better without the stupid leak… well driving on the highway about 2 hours after getting the flange in the turbo all the sudden makes a loud sound as if metal was grinding and the turbo stops boosting. Please keep inmind THAT I DO NOT OVER REV THE t25 AND ONLY MODERATE BOOST. So I bring it home and take off the inlet flange and again the turbo is blown, no smoke but crazy shaft play and bent outside fins. This is also a week and a half after I replaced the turbo and I didn’t drive it for 2 days because of the blown exhaust gasket.
Well so now I get really curious and check the oil pressure by hooking up a gauge and the pressure is just fine. Check the banjo and I see small metal threads in the banjo. I clean nit out and find out that the threads on the block for the oil is stripped (but only on the outside) so I re tap it with a heilcoil and wrap the banjo with Teflon tape and it seals up just fine. I also (when I have the second blown turbo in) took off the oil return line(the black rubber hose) oil just flowed out real nicely like nothing was wrong. Also the water pressure should be fine since a whole bunch of it came out when I took off the banjo from the block.
THE PROBLEM
Now I finally get fed up and pay good money for a completely rebuilt turbo, I mean balanced and everything, it has even been sand blasted and repainted. I put the new turbo in and start driving (knowing that it needs to be broken in) at a steady rate and as It starts to get close to ZERO boost a whining noise that is coming from the front of the car(engine bay). After probably about 10 miles of driving it gets worst. Also it only happends before boost, when it does boost you don’t hear anything wrong with it. Another thing to mention is that when this sound happens it wont boost at all and it holds back for about 3 or 4 seconds then it boost.
I open the inlet flange again and it now has shaft play but nothing to bad. It isn’t scratching the wall and no bend flanges. All the lines have been tighten. I replaced the wastegate. Checked for tares in the plastic lines.
I cant figure it out….
I have a s13 sr20det redtop t25, sidemount, greddy type s bov, 3 inch exhaust, xs power exhaust manifold.
She runs at 7 psi and no more. When I first got the car the turbo was blown and white smoke would come out the exhaust. I replaced it with another used t25 and at the same time removed the power steering to have a easier time. One week later the turbo starts locking up (I would boost some times and at other times it would not boost at all) So I check the turbo by taking off the inlet flange and the shaft play was crazy! And some of the outside fins were bent… Well no big deal, a good friend of mine gave me his t25 that has the tiniest shaft play, one of the best I have ever felt.
So I replaced the turbo and everything runs great! Spools great and everything minus one problem, theres a nasty exhaust leak from the rectangular flange that goes in between the manifold and the t25 (its acheap ebay cardboard flange). Well I then changed the flange to a metal one and it runs even better without the stupid leak… well driving on the highway about 2 hours after getting the flange in the turbo all the sudden makes a loud sound as if metal was grinding and the turbo stops boosting. Please keep inmind THAT I DO NOT OVER REV THE t25 AND ONLY MODERATE BOOST. So I bring it home and take off the inlet flange and again the turbo is blown, no smoke but crazy shaft play and bent outside fins. This is also a week and a half after I replaced the turbo and I didn’t drive it for 2 days because of the blown exhaust gasket.
Well so now I get really curious and check the oil pressure by hooking up a gauge and the pressure is just fine. Check the banjo and I see small metal threads in the banjo. I clean nit out and find out that the threads on the block for the oil is stripped (but only on the outside) so I re tap it with a heilcoil and wrap the banjo with Teflon tape and it seals up just fine. I also (when I have the second blown turbo in) took off the oil return line(the black rubber hose) oil just flowed out real nicely like nothing was wrong. Also the water pressure should be fine since a whole bunch of it came out when I took off the banjo from the block.
THE PROBLEM
Now I finally get fed up and pay good money for a completely rebuilt turbo, I mean balanced and everything, it has even been sand blasted and repainted. I put the new turbo in and start driving (knowing that it needs to be broken in) at a steady rate and as It starts to get close to ZERO boost a whining noise that is coming from the front of the car(engine bay). After probably about 10 miles of driving it gets worst. Also it only happends before boost, when it does boost you don’t hear anything wrong with it. Another thing to mention is that when this sound happens it wont boost at all and it holds back for about 3 or 4 seconds then it boost.
I open the inlet flange again and it now has shaft play but nothing to bad. It isn’t scratching the wall and no bend flanges. All the lines have been tighten. I replaced the wastegate. Checked for tares in the plastic lines.
I cant figure it out….