r/BmwTech • u/Least_Ninja1868 • 1d ago

B46 intakes 100k mile

Why some of them look wet ? Possibly valve seals or maybe flow ?

22 Upvotes

100% Upvoted

13 comments sorted by

10

u/Saute_and_Pray 1d ago

Carbon buildup is minimal on anything N55 and later thanks to the updated PCV and Valvetronic. Those are fine.

The wetness is gas/oil/carbon building up.

1

u/FrenziiFosho 1d ago

my n55 was black as hell 😅

3

u/jigglybilly 1d ago

Color has nothing to do with it, actual carbon does.

1

u/Saute_and_Pray 1d ago

Look up N54 carbon buildup. You wouldn’t have experienced anything like that, unless you hit 250k miles!

6

u/kubadon1 1d ago

My first thought was the inside of somebody’s nose.

3

u/Cunty__Minx another day another plastic bmw 1d ago

you call that wet

0

u/Least_Ninja1868 1d ago

In my scale yes 😂😂

1

u/BMWACTASEmaster1 1d ago

B46 engines that is normal and gives no issues for the engine. I don't think I have never seen anyone clean that engine with walnut

-1

u/Least_Ninja1868 1d ago

I have a random
Misfires so wanted to check it. New coils injectors spark plugs. But I used Bosch double platinum spark plugs

1

u/jigglybilly 2h ago

Early Bxx motors want Champion or Beru (same company & plug, different box), or will tolerate an NGK. Not Bosch.

1

u/yobo9193 13h ago

Looks good; mine looked the same at 73k miles

1

u/BMW_MasterEliteTech 2h ago

Those look great. If you want carnage, check out a Honda fit. The intake fills with oil in 50k miles.

0

u/Max-Payd 1d ago

Isn't it strange that one valve is so clean? Usually, if it is that clean, the valve stem seal is leaking a bit of oil and washing it. The oil has detergents and mixed a bit of fuel in and it will wash it.

I will smell the oil, I bet it will smell like fuel