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> Exhaust Gas Leaking From Turbo Area
cyrusyn01
post Nov 13 2012, 08:04 PM
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Drives: 91 740 turbo



1991 740 Turbo
200k
all stock

Now days I hear exhaust gas leak from inside engine room when the motor is fully warmed up and ran for some time. The other day I put seafoam treatment in the car and I saw white smoke coming from the turbo charger area.

Is exhaust gas leak from the turbo charger common?
What are the possible cause for this?
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danielm85948
post Nov 13 2012, 10:10 PM
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QUOTE (cyrusyn01 @ Nov 13 2012, 08:04 PM)
1991 740 Turbo
200k
all stock

Now days I hear exhaust gas leak from inside engine room when the motor is fully warmed up and ran for some time. The other day I put seafoam treatment in the car and I saw white smoke coming from the turbo charger area.

Is exhaust gas leak from the turbo charger common?
What are the possible cause for this?

can you say which part of the turbo the smoke is from.
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cyrusyn01
post Nov 15 2012, 04:58 AM
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Seems like it comes from where the TC meets the straight pipe.
Definitely not the header.
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danielm85948
post Nov 15 2012, 08:02 AM
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QUOTE (cyrusyn01 @ Nov 15 2012, 04:58 AM)
Seems like it comes from where the TC meets the straight pipe.
Definitely not the header.

check the clamp it has a ten mil bolt try to just tighten it, and any of the other bolts.
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cyrusyn01
post Nov 16 2012, 04:26 AM
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The clamp? You meant the flange between the straight pipe and the TC?
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danielm85948
post Nov 17 2012, 06:13 AM
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QUOTE (cyrusyn01 @ Nov 16 2012, 05:26 AM)
The clamp? You meant the flange between the straight pipe and the TC?

yes ,that flange has a 10 mil nut, and will start to get loose ,due to the heat, but tighten the other bolts as well, as the heat expand the parts, then they will leak.

This post has been edited by danielm85948: Nov 17 2012, 06:15 AM
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cyrusyn01
post Nov 17 2012, 08:40 PM
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Thank you very much. Os it was the exact same problem that even plagues the state of art fighter jets, now I have to deal with it. I will try and see if tightening the flange nuts seal the leak.
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