Yet another "smoke" question Smoke after boost = ??

[tmyers22]

My son just got a 2g tsi stock motor (in fact stock everything except cosmetics, transmission and suspension. The car seems to run great. The only thing is the car will generate a lot of white smoke after boost. It smells like fuel not coolant and it is white smoke and does not smell or look like oil smoke. Dropped by my mechanic today with the car (he is not a DSM guru or anything) but he thinks the valve seals may be bad). Bad valve seals would be blueish smoke would it not? I was thinking the car is running rich for some reason. Coolant would almost have a sweet smell to it am I correct? Is there any way to tell? I am bringing it to the mechanic for a pressure test tomorrow but is there any other "tests" to tell what the smoke is? Again the only thing I smell is fuel and it is a strong smell. I have read about 30 smoke related threads but have not found any like this. Any help would be appreciated. I am old school and am trying my best to learn these DSM's.

 

[dyetrying91]

Your turbo is most likely blown. Do you have a gauge to see just how much boost it's actually pushing?

 

[tmyers22]

No gauge just the stock thing in the cluster. Is the only way to see if your turbo is bad to check for side to side and "in and out" shaft movement or are there other ways to know? How much movement if any is accpetable?

 

[luckynumber5]

Should have a small amount of play with no oil pressure. Dont try moving it around too much, it should just barely move.

Check the intake piping for a leak, if the mass air meter is reading more air going into the turbo than is going into the engine that will do it.

 

[LiquidX]

If the compressor blade can touch the wall then it needs rebuild. If there is any in and out play then it needs a rebuild. Boost leak test would be a good thing to do and I can guarantee you have at least one leak. Common leak points are throttle body shaft seals, injector seals and the BISS. Use soapy water and spray everything that sees pressurized air and if it leaks there will be bubbles.

Being white smoke, a compression test wouldn't hurt.

 

[tmyers22]

Well, the turbo took a complete dump today I think. He (my son) was driving the car home from baseball this morning and said it will not boost at all now. Sooo, in the AM I am going to drop our spare turbo on and see what happens.

Ok, my son and I brought his car in for a compression test and found the #3 cylinder has 70lbs YAH!! The other three were like 125 or there about. Knowing this I contacted the dealer we bought the car from and he is going to put new piston rings on and a new turbo (I assume not a brand new one so I should say a different one). He will also put on a new head gasket set (basic because the head has to come off). What else should I ask about having done?