white smoke & no boost = ?

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jeremyuhh
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white smoke & no boost = ?

Post by jeremyuhh » Wed Jun 04, 2014 2:54 pm

so its been about 150 miles since i turbo'd my KA. Pulls and drives fine. AFRs are perfect and no vacuum or boost leaks. Drove today in about 80+ degree weather for 25 miles. boosting here and there on the freeway. Drove back 25 miles, boosting here and there again on the freeway. Once i exit, i notice a lack of power, felt as if the car was NA again.

At a stop, white smoke is coming out of my exhaust, not a ton but a good amount. Once i move it goes away.

I step on it a little and i see almost no boost. 0.1 bar at the least. i dont hear my BOV and i can barely hear the turbo spool.

My stock temp gauge is reading normal, my AFRs are reading normal.

Im currently at work and want to diagnose this before i go home, so I know to drive the car or not. Is this a blown turbo or blown headgasket, crack in my block, or leak in my intake manifold? I have not had a chance to check my oil nor my coolant reservoir yet.

any in put is appreciated. thanks.

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Kruked
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Re: white smoke & no boost = ?

Post by Kruked » Wed Jun 04, 2014 8:24 pm

Turbo or manifold bolts could've backed out.

My turbo studs all backed out last week. Loss of power, some smoke, but....very audible exhaust leak.
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jeremyuhh
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Re: white smoke & no boost = ?

Post by jeremyuhh » Thu Jun 05, 2014 8:08 am

I don't think they're my bolts. I checked those and they're still tight.

I actually drove home, still no boost, no bov, barely hear the turbo but no smoke at all. Before exiting the freeway I decided to do a 4th hear pull and I did hit full boost but it took about a Second to half a second to reach max boost. Shortly after, I come to a red light and a bunch of white smoke was blowing out of my exhaust again.

Checked my oil and it still looked new. Checked my clamps and they were all tight. But the water in my coolant resovoir went down a considerable amount.

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shift_down
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Re: white smoke & no boost = ?

Post by shift_down » Thu Jun 05, 2014 11:47 am

Do a compression test and you will have your answer
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jeremyuhh
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Re: white smoke & no boost = ?

Post by jeremyuhh » Sun Jun 08, 2014 11:22 pm

shift_down wrote:Do a compression test and you will have your answer
did a compression test and got 160 across the board.

drove the car, pulled great, i was seeing full boost.

got back home after a 15 minute drive and now a TON of white thick sweet smoke was coming out of my exhaust.

checked the engine and i saw brown water dripping from my bellhousing. traced the leak from the bellhousing to my starter but i could not locate the origin. Im guessing its either a loose line or a crack in the block ? but my temps, compression, and everything else seem fine.

and if it was a loose line, how is an external intake hose seeping into my intake ?

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Re: white smoke & no boost = ?

Post by cleantune » Wed Jun 11, 2014 4:36 pm

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A coolant leak shouldn't effect boost. You are not over-boosting, so we can take out the wastega..... wait, have you checked your wastegate? if the wastegate is stuck open, the turbo will not be able to build boost very efficiently. A kinked/collapsed line or stuck valve could cause something like this.

As for the smoke, is it coming from the exhaust tip?

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jeremyuhh
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Re: white smoke & no boost = ?

Post by jeremyuhh » Wed Jun 11, 2014 11:53 pm

yes, the white smoke is coming out of the exhaust at stops. only when i hit full boost and boost hard on the freeway.

if i drive the car normally and spool the turbo, there is no white smoke at all.

i took the car to a shop that specializes in 240s. They pressurized my radiator and located the source of the leak. It was a loose hose on one of the cooling lines on the intake manifold. This still puzzles me as to how its seeping into my exhaust.

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cleantune
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Re: white smoke & no boost = ?

Post by cleantune » Thu Jun 12, 2014 4:26 am

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Is the turbo liquid cooled?

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airman
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Re: white smoke & no boost = ?

Post by airman » Thu Jun 12, 2014 4:54 am

Could have been the intake #1 port could have had a small leak - in vacuum (aka idle) it can suck water in if it's loose. It wouldn't be a hose though, but rather on the head-to-intake flange. If the true fix was really a loose water hose around the intake, and didn't have to do with the cyl #1 port, I...I don't know how it would have been coming out of your tailpipe.
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