i just made my Down pipe and thier alots of white smoke coming out of my muffler befored the down pipe was install this never happen what the meaning of this blew head gasket ? help me out !!! thank

 

Is there water in the exhaust? Does it have a sweet smell? Do you see antifreeze in the exhaust?

Oil in the downpipe?

White smoke is usually from metal burning.

 

It may just be the oil burning off the DP.

 

That is most likely the culprit. It might just appear white, but is really a "bluesh" hue. If its pure white clouds of smoke, it is generally metal burning

 

thank for the info guys i don't see any coolant in the exhaust it doesn't have a sweet smell the car pull good nothing seem wrong with the car so i hope it just meatal buring

 

I'd check your downpipe for oil. If you're burning metal thats not a good sign.

Right before my first motor blew up it was burning white smoke. I ignored it thinking I was burning oil, and about an hour later I spun a bearing. One of the pistons had lost its balance and parts of the valve were starting to bond with the piston when it rose up because of the immense amount of heat (there was damage to the piston surface giving me this indicator).

If you're hearing detonation, or anything sounds a little off you need to sorely examine everything.

It is most likely oil if there are no "odd" sounds. But just to be safe I would check the downpipe and turbo to see if oil is leaking from those. You may also want to monitor the oil pressure.

 

Your turbo my also be bad. Mine is, and it smoked bad at idle. I have another one on the way here now though!

 

I am assuming that you aren't using a catalytic converter?

 

yeah i check the DP and i see some oil spot on the DP and thier also oil in the charge pipe so i guess my seal are blow ?damn this suck so much ---- happen and no i don't use a CAT also how loud is detonation can you hear it while driving ? any tip on how to fix it would be great !!!

 

Detonation can be heard from the cabin. It sounds like tapping on the valve cover, or when I experienced it it sounded more like when you take a hose at full power and bend the neck of it at about a 60 degree angle. That sound is almost identical.

Think about it, detonation results in the cylinder rods shaking, so you hear them tapping. Sometimes it may get so bad that you can also hear the valves tapping.