Pulled Turbo, have questions

FerociousP · 02-17-2010, 11:45 PM

I pulled the turbo because I had an exhaust leak on one rotor and assumed it was the block-to-manifold or block-to-turbo gasket. However, the 4th picture shows what was causing the leak. A EGT hole! I can't believe I didn't see it taking off the turbo but I was too worried about not breaking studs to notice.

Other than an EGT sensor itself, do I use a steel or brass NPT plug to stop the leak?

It is a Knightsport front housing with stock hotside. The wastegate is unported as far as I can tell. It has had part of the front housing ground down slightly to fit next to the LIM. Can anyone tell me what to expect out of the turbo as a whole?

I noticed a deposit that seams to be leaking out of it (see pic 5). Can anyone tell me what this is and if it is a symptom of a problem? Coolant?

If it has problems I want to take care of them before it goes back on the motor.

Thanks!

RETed · 02-18-2010, 01:41 AM

I've used steel and brass and either or will work.
The brass is more forgiving and should be easier to remove if you need to at a later date.
The metal doesn't get hot enough to melt brass.

-Ted

FerociousP · 02-18-2010, 11:13 AM

Thanks Ted, I'll go with brass.

FerociousP · 02-18-2010, 02:18 PM

Anyone have any ideas as to the white deposit on the hotside? I'll try to take a better pic tonight.

Bryan@BNR · 02-18-2010, 02:46 PM

Quote:

Originally Posted by FerociousP

Anyone have any ideas as to the white deposit on the hotside? I'll try to take a better pic tonight.

You have a coolant leak.

FerociousP · 02-18-2010, 02:53 PM

Ok. I have never rebuilt a turbo. What would it take to get rebuilt? Can I do this myself?

What would it cost to send it to you and be rebuilt?

Thanks btw.

FerociousP · 02-24-2010, 07:01 PM

Hi-res pics of the leak.

Ender · 02-24-2010, 10:26 PM

Quote:

Originally Posted by FerociousP

Ok. I have never rebuilt a turbo. What would it take to get rebuilt? Can I do this myself?

No, you can't, not properly. They need very precise balancing. I disassembled my turbo once and reassembled it after realizing I couldn't do any good with it apart anyway. I tried very, VERY carefully to put it together EXFUCKINGACTLY like it came apart and it would appear I got very, VERY lucky. I will never do that again after hearing how easily a turbo can become imbalanced and then tear itself apart.

1Revvin7 · 02-25-2010, 08:50 PM

Coolant leak is probably coming from one of the coolant hardlines. Chances are just a crush washer needs to be replaced. Look for pitting on the hardline and chra though.

02-17-2010, 11:45 PM	#1
FerociousP I-had-a-bad-experience... Join Date: Feb 2008 Location: M'boro iTrader: (2) Posts: 1,046 Rep Power: 18	Pulled Turbo, have questions I pulled the turbo because I had an exhaust leak on one rotor and assumed it was the block-to-manifold or block-to-turbo gasket. However, the 4th picture shows what was causing the leak. A EGT hole! I can't believe I didn't see it taking off the turbo but I was too worried about not breaking studs to notice. Other than an EGT sensor itself, do I use a steel or brass NPT plug to stop the leak? It is a Knightsport front housing with stock hotside. The wastegate is unported as far as I can tell. It has had part of the front housing ground down slightly to fit next to the LIM. Can anyone tell me what to expect out of the turbo as a whole? I noticed a deposit that seams to be leaking out of it (see pic 5). Can anyone tell me what this is and if it is a symptom of a problem? Coolant? If it has problems I want to take care of them before it goes back on the motor. Thanks! __________________ '15 Juke Nismo '06 MX-5 GT SOLD '04 S Silver RX-8 GT Track Day Use SOLD '90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD '89 GTUs 6p TII SOLD, '87 sport SOLD, '79 SA stock SOLD '91 B2600i 4x4 w/ Rx-8 LSD SOLD

02-18-2010, 11:13 AM	#3
FerociousP I-had-a-bad-experience... Join Date: Feb 2008 Location: M'boro iTrader: (2) Posts: 1,046 Rep Power: 18	Thanks Ted, I'll go with brass. __________________ '15 Juke Nismo '06 MX-5 GT SOLD '04 S Silver RX-8 GT Track Day Use SOLD '90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD '89 GTUs 6p TII SOLD, '87 sport SOLD, '79 SA stock SOLD '91 B2600i 4x4 w/ Rx-8 LSD SOLD

02-18-2010, 02:18 PM	#4
FerociousP I-had-a-bad-experience... Join Date: Feb 2008 Location: M'boro iTrader: (2) Posts: 1,046 Rep Power: 18	Anyone have any ideas as to the white deposit on the hotside? I'll try to take a better pic tonight. __________________ '15 Juke Nismo '06 MX-5 GT SOLD '04 S Silver RX-8 GT Track Day Use SOLD '90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD '89 GTUs 6p TII SOLD, '87 sport SOLD, '79 SA stock SOLD '91 B2600i 4x4 w/ Rx-8 LSD SOLD

02-18-2010, 02:53 PM	#6
FerociousP I-had-a-bad-experience... Join Date: Feb 2008 Location: M'boro iTrader: (2) Posts: 1,046 Rep Power: 18	Ok. I have never rebuilt a turbo. What would it take to get rebuilt? Can I do this myself? What would it cost to send it to you and be rebuilt? Thanks btw. __________________ '15 Juke Nismo '06 MX-5 GT SOLD '04 S Silver RX-8 GT Track Day Use SOLD '90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD '89 GTUs 6p TII SOLD, '87 sport SOLD, '79 SA stock SOLD '91 B2600i 4x4 w/ Rx-8 LSD SOLD Last edited by FerociousP; 02-18-2010 at 03:15 PM..

02-24-2010, 07:01 PM	#7
FerociousP I-had-a-bad-experience... Join Date: Feb 2008 Location: M'boro iTrader: (2) Posts: 1,046 Rep Power: 18	Hi-res pics of the leak. __________________ '15 Juke Nismo '06 MX-5 GT SOLD '04 S Silver RX-8 GT Track Day Use SOLD '90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD '89 GTUs 6p TII SOLD, '87 sport SOLD, '79 SA stock SOLD '91 B2600i 4x4 w/ Rx-8 LSD SOLD Last edited by FerociousP; 02-24-2010 at 07:04 PM..

02-25-2010, 08:50 PM	#9
1Revvin7 Turblown Engineering Join Date: Feb 2008 Location: AZ iTrader: (0) Posts: 62 Rep Power: 17	Coolant leak is probably coming from one of the coolant hardlines. Chances are just a crush washer needs to be replaced. Look for pitting on the hardline and chra though.

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