I have badly white smoke came out from exhaust after idle. My car has catless downpipe, no second cat straight pipe to muffler. I have replaced valve cover but the problem still remains. Is there any problem with engine or fuel system?

 

Water in the oil?
Blown head gasket?
Compression Test?

 

No coolant in oil, I didn’t do compression test.

But it actually happened after I installed Catless downpipe. Then I got tuned but it helps a little bit.

 

how long have you had the DP installed?
what DP did you choose?
what level is your coolant tank? (low, full, overfull?)

**some coatings like ceramic etc can take a bit to burn-in and cause discoloration in the smoke and funky smell for few days/heat cycles

 

I have CNT V.3 catless downpipe(T304 stainless) Coolant normal level.