Exhaust Smoke - My 99 9-3 - The Saab Link Forums

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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 08-14-2012, 05:10 AM   #1
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Exhaust Smoke - My 99 9-3

So my car started smoking a few days ago. It is releasing a blue and white smoke when hot. There is a nasty burning smell sometimes. It does not smoke at startup that I can tell. It appears that I am losing some oil and coolant via burn. No leakage to the ground. It still runs normal but maybe had some loss of boost before the smoke started. I am running on base boost now.

It smokes between shifts and when decelerating but not at idle and not when cruising. It does not smoke at WOT. It smokes when I rev it sometimes.

What say you? Iím thinking head gasket or my stock T25 turbo has failed. The head gasket was replaced 7 years ago before tuning. I have been running stage 3 at 19.5 psi for the last 2.5 years. Iíve been running it hard in the heat lately (never overheated and low speed fan works OK).

If I do a compression test and if the numbers are 180-190 psi, can I conclude that the head gasket and motor internals (pistons/rings/valves/valve seals) are good? Any other thoughts as to the cause?

Thanks,
Tony Jaworski
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Old 08-14-2012, 06:34 AM   #2
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First guess is the you're losing the seals in the turbo.

A cheap rebuild kit for the turbo is about $60, a better solution would be a rebuilt center section.

Probably the best low cost option would be a used turbo (if it's got a warranty)
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Old 08-14-2012, 07:54 AM   #3
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Thanks - I agree, probably the turbo seals. I'm going to pull the plugs later this week, look for signs of coolant and check compression while there.
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Old 08-16-2012, 04:03 PM   #4
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I have a feeling it's your turbo. I bet it burns right in the beginning of going WOT and then returns to normal through the rest of the RPMs.
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Old 08-18-2012, 06:41 AM   #5
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The compression numbers are in. Done hot w/ fuse 32 removed. 110k miles on motor. Numbers look real good so maybe time for the Big T28. I’m a little undecided since the car’s a little long in the tooth but I know I won’t be happy with another car short of a CTS-V, 335, STI or M5. Need 4 doors.

1 = 205 psi
2 = 205 psi
3 = 205 psi
4 = 200 psi
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Old 08-18-2012, 07:09 AM   #6
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That's close to where my numbers are as well which makes me think it's your turbo even more.
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Old 08-18-2012, 07:56 AM   #7
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That's close to where my numbers are as well which makes me think it's your turbo even more.
Roger that! It did start to whine a few months ago.
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Old 09-25-2012, 11:30 AM   #8
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So my T25 is at the GPOP Shop getting rebuilt into a Big T28!

I'll be running this on lower boost (19-21 psi) until I get injectors, 3 bar map sensor and a fuel pump.

Tony
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Old 10-07-2012, 03:59 PM   #9
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Old


New


New


Engine


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Old 10-07-2012, 04:08 PM   #10
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All smoke gone?
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Old 10-08-2012, 04:23 AM   #11
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All smoke gone?
Roger that! Nice to be back on the road again
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Old 10-08-2012, 04:58 AM   #12
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having the exact same issue with my car, havent compression tested it yet, but hoping its the same thing. Whatd the gpopshop rebuild cost if you dont mind me asking?

I have a tdo4 at home that needs a rebuild as well, so i'm up in the air about what to do lol.
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Old 10-08-2012, 01:33 PM   #13
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msg sent
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Old 10-09-2012, 06:04 PM   #14
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I'll be doing the same thing this weekend when it's time for an oil change.
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Old 11-02-2012, 11:53 AM   #15
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I finally got a JZW Stage 5 ECU, Green Giant injectors and the 3 bar map sensor installed. I pulled a real amateur hour and wired the IAC to injector #1 and vise versa. This cost me a trip to the shop but it's back and running strong! Only got a few miles now but it really runs nice!
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Old 11-02-2012, 12:02 PM   #16
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Damn! Thats a quick turnaround to a stage 5 car haha! Must go like stink!
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Old 11-02-2012, 12:11 PM   #17
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Yeah, it pulls like a freaking train. I haven't hit it that hard yet but I did give it the full goose once and the tires were screaming in second
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Old 11-02-2012, 12:49 PM   #18
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once and the tires were screaming in second
Oops

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