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Old 04-24-2013, 03:13 PM   #1
Serkan
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Join Date: May 2008
Chapter/Region: E. Canada
Location: Windsor
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2004 Sti White

Default Smoke in boost

I made a thread about the 05 lgt I bought and looking to figure out the problem.

http://forums.nasioc.com/forums/show....php?t=2474435

-Compression test was done and 140 psi in all 4.
-No overheating
-No smoke at start up or idling
-No smoke revving engine in park
-No smoke out of filler tube or dip stick tube
-Bubbles appear in expansion tank
-There is always water droplets in exhaust tips.

I swapped the vf40 with a used vf46. Changed oil and plugs.

Car doesn't smoke on start up or while idling. It doesn't smoke cruising with light acceleration.

But as soon as car warms up and I get on throttle it throws smoke in tail pipe. I am not sure of the color tho. I guess it is bluish.

After 5 mins of spirited driving, it continues to smoke at idle for couple mins and it stops.

Is this another blown turbo ?

Video of smoke at idle after 5 mins of driving with boost, smoke is gone after 4-5 mins
View My Video
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Last edited by Serkan; 04-24-2013 at 04:24 PM.
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Old 04-24-2013, 03:19 PM   #2
RoadKillDMD
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Quote:
Originally Posted by Serkan View Post

Is this another blown turbo ?
Quote:
Originally Posted by Serkan View Post

Could it be another bad turbo (vf46), it had a noticeable in and out play.
Sure sounds like it ^^^
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Old 04-24-2013, 03:20 PM   #3
guroove
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Any in and out play means the turbo is done.
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Old 04-24-2013, 03:52 PM   #4
Serkan
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Ok scratch the bubbles in coolant part.

I started the car and opened the expansion tank cap and lots of bubbles forming. I don't know if i had air trapped after turbo swap.
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Old 04-24-2013, 03:56 PM   #5
Serkan
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Quote:
Originally Posted by guroove View Post
Any in and out play means the turbo is done.

A reputable seller in lgt forum sold me this turbo and I really don't wanna go with filing claim for refund, that is why I am posting it to get some ideas and make sure it is the turbo.

But yea the vf46 had in-out play. It would make a click noise if i hold it from both ends and pushed it in and out.
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Old 04-24-2013, 04:03 PM   #6
Serkan
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Here is a video after i drove it with some boost for 5 mins and parked.

The smoke stopped after 4-5 mins of idling. I can never make the smoke color, is this white or blue ?

View My Video
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Old 04-24-2013, 04:08 PM   #7
RoadKillDMD
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It looks white-ish from what I can see. How does it smell? Does the exhaust have kind of a sweet smell to it?
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Old 04-24-2013, 04:13 PM   #8
Serkan
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I am not so sure but it is not a nasty smell.
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Old 04-25-2013, 12:18 PM   #9
RoadKillDMD
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We need to know what it smells like. Does it smell like fuel? Does it smell like oil? Does it smell like coolant? Determining the smell will give you a better chance of pinpointing your problem.
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Old 04-25-2013, 01:08 PM   #10
guroove
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You said there are bubbles in the coolant, and there are water droplets on the exhaust tips. This probably means that coolant is getting into your combustion system somehow, either through the head gaskets, turbo, or possibly even a crack in the block. Have the cooling system pressure tested and see where it is leaking to.
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Old 04-25-2013, 02:30 PM   #11
Serkan
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Default

I can't tell if the smell is sweet but it doesn't disturb me if I get close to it. It is like being in water steam but lil heavier.

I left the expansion cap on until engine warmed up and bubbling stopped once coolant started expanding.
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