What is this white stuff on my turbo (hot side) w/ pics

[crrider80]

Hi, after taking out my turbo i stumbled upon this white corrosion like substance on my turbo propeller and waste gate door. My first guess is burnt coolant because burnt coolant blows white smoke. I would like to know what this stuff is.

also, this may be irrevalent but the impeller is pwn3d with chips. Thanks in advance!
-Steve

 

[IJ.]

Some of the additives in fuel will leave the white stuff.

Do you have any reason to suspect Coolant?

 

[crrider80]

Some of the additives in fuel will leave the white stuff.

Do you have any reason to suspect Coolant?

yes actually. I just bought this car and i've been working on it for the past few weeks. The previous owner put in a refurbished head and im not sure if it had a bhg. In the coolant i found some oily residue so that got me suspicious of a bhg. Thanks for your reply.
-Steve

 

[IJ.]

It would be worth doing a test with the HG/Coolant test kit and welcome to SM!

 

[crrider80]

It would be worth doing a test with the HG/Coolant test kit and welcome to SM!

That wont be necessary since I'm in the process of tearing apart the motor. Thanks again for your help.
-Steve

 

[westonboege]

white deposits can also mean its runnin lean... black deposits are from runnin rich... also the others stated

 

[lagged]

classic sign of a BHG!

 

[dbsupra90]

race gas will do this

 

[b005t3d]

ive always heard from a great source here in nashville(jeff at turbo auto) that those are tell tale signs of running lean. IJ is the man though. but its gotta be one of the 2 posibilities.

 

[crrider80]

you know what guys, it can be all of the above. The guy I bought it from cranked up the boost to 12/13 psi or so without monitoring the a/f ratio. The coolant has oily residue which is why I suspect bhg. The engine is locked up from a spun bearing (so i've been told). Thanks for all your replys.
-Steve

 

[b005t3d]

you know what guys, it can be all of the above. The guy I bought it from cranked up the boost to 12/13 psi or so without monitoring the a/f ratio. The coolant has oily residue which is why I suspect bhg. The engine is locked up from a spun bearing (so i've been told). Thanks for all your replys.
-Steve

you got it bro. swap out that bhg and roll it. woop some crustangs for us...

 

[Joel W.]

Looks lean or like it ran really hot to me.. Are there any cat converters on the car?

 

[Allan_MA70]

thats typicaly a sign of good stoich cruise mixtures! its the burnt off carbon... just like a wood fire that has burnt all available fuel leaves gray powdery ash

 

[crrider80]

Looks lean or like it ran really hot to me.. Are there any cat converters on the car?

nope, stock exhaust all the way through

 

[Joel W.]

The stock system has 2 cats, a pre cat and the normal cat.. If either of these gets restricted the heat will not be able to get out fast enough and you can sometimes tell by that color that it has been hot...

It is hard to tell from a picture..So I am not saying the cats are plugged up, just that they could be plugged...

 

[bowsercake]

I just took off my turbo and it looked the same way. I have a BHG and I spun a bearing so it's all getting redone.

Just checking that this is caused by the BHG and not running lean. I never really had white smoke at all, just a little at startup.