[mrichter]

So I just purchased an 08 335i. It has a secondary cat delete. I am getting a more than normal amount of white smoke from the tail pipes. Leakdown and compression tests all came back fine.

Is this just a by product of not having the secondary cats?

I have used the search function, unfortunately most results are how to delete them, not what the end result could be.

If someone can clarify for me, that would be great.

[MannySingh]

Originally Posted by mrichter

So I just purchased an 08 335i. It has a secondary cat delete. I am getting a more than normal amount of white smoke from the tail pipes. Leakdown and compression tests all came back fine.

Is this just a by product of not having the secondary cats?

I have used the search function, unfortunately most results are how to delete them, not what the end result could be.

If someone can clarify for me, that would be great.

Time to get some new turbos brotha

[mrichter]

I had them checked as well. No leaks and no wastegate rattle. What else could be wrong with them?

[MannySingh]

Originally Posted by mrichter

I had them checked as well. No leaks and no wastegate rattle. What else could be wrong with them?

oil filter housing gasket

[musa]

Originally Posted by MannySingh

oil filter housing gasket

His coolant level should go down then, no? .....as an indication of coolant lose?

[Grand_hustle17]

Im gonna say turbos... try changing pcv valve to RB's 1st

[siphor1989]

Originally Posted by mrichter

So I just purchased an 08 335i. It has a secondary cat delete. I am getting a more than normal amount of white smoke from the tail pipes. Leakdown and compression tests all came back fine.

Is this just a by product of not having the secondary cats?

I have used the search function, unfortunately most results are how to delete them, not what the end result could be.

If someone can clarify for me, that would be great.

Are you losing oil or coolant? What does the smoke smell like and are you sure it's not just condensation especially around this time of the year?

I see quite a bit of white smoke especially at idle too but my trips are extremely short so I'm sure a lot of condensation builds up in the exhaust. Also the smoke just smells like steam.

[mrichter]

Originally Posted by siphor1989

Are you losing oil or coolant? What does the smoke smell like and are you sure it's not just condensation especially around this time of the year?

I see quite a bit of white smoke especially at idle too but my trips are extremely short so I'm sure a lot of condensation builds up in the exhaust. Also the smoke just smells like steam.

Car seems to smell warm. however, no coolant loss or oil loss. secondary cat delete seems to be the only variable at this point. i may put them back in and see what happens. i have also changed the valve cover and PCV, OFHG, coolant flush and oil change, intake walnut blast.

i did see another 335 all stock today that was smoking more than other cars around it. maybe its normal for these turbo engines??

[mrichter]

Originally Posted by Grand_hustle17

Im gonna say turbos... try changing pcv valve to RB's 1st

what will this accomplish?

[Grand_hustle17]

Originally Posted by mrichter

what will this accomplish?

Well its good maintenance the OEM pcv valves are known to fail which can cause pressure leaks and or oil loss.

[parksjm7]

fuel injector leaking? yours may be covered. search for index 12 injectors - if yours are leaking, the engine is dumping more fuel than necessary = excess condensation when cold. mine had your symptoms until I swapped the faulty injectors.

[mrichter]

Originally Posted by parksjm7

fuel injector leaking? yours may be covered. search for index 12 injectors - if yours are leaking, the engine is dumping more fuel than necessary = excess condensation when cold. mine had your symptoms until I swapped the faulty injectors.

how would i find out if they are covered?

[parksjm7]

Originally Posted by mrichter

how would i find out if they are covered?

call Bmw or Google their recall page. you'll be prompted to enter your vin and it'll show you if any recalls are outstanding.

[musa]

Originally Posted by parksjm7

call Bmw or Google their recall page. you'll be prompted to enter your vin and it'll show you if any recalls are outstanding.

Here, key in your vin when prompted to see if any outstanding recall on your vehicle:
http://www.bmwusa.com/standard/conte...eoverride=true

[mrichter]

Originally Posted by musa

Here, key in your vin when prompted to see if any outstanding recall on your vehicle:
http://www.bmwusa.com/standard/conte...eoverride=true

unfortunately i am in canada, and it seems that most of the mass recalls on these vehicles, are american only. god bless america for class action lawsuits....

[STR8-6IX]

putting your secondary cats back on will change nothing, dont even bother. white smoke is normal for our cars. make sure you always check and top up coolant/oil levels if necessary.

[whyzee125]

Could be VCG or PCV but by far the most likely is turbo seals starting to go.

[limitdown]

Going fully catless will only show existing problems more apparently. They will not in themselves cause smoke. I am fully catless from the turbo back to the tailpipe and I have zero smoke.
Smoke can be caused by cracked valve cover, leaky valve cover gasket, oil filter housing gasket, turbo seals, bad PCV, bad valve stem seals. I've been unlucky to have had every single one of those problems.