View Single Post
      03-29-2022, 11:08 AM   #24
belcom
Lieutenant
belcom's Avatar
Canada
179
Rep
429
Posts

Drives: '18 540i, '06 Z4si, '07 Z4MC
Join Date: Nov 2014
Location: Toronto

iTrader: (1)

Quote:
Originally Posted by rsutoratosu View Post
Press submit too fast.

So while I had the valve cover off. I put in new plugs. The old original plugs were really soil. I read a non working pcv can cause that, ie old pcv due to age. Or should I be looking for other issues. Car drives fine. 15 years old 88k currently
Your PCV is built into the valve cover so the new cover you bought gives you a brand new PCV along with that.

How do you mean the plugs were soiled? Just black soot? Do you see oil on them? White residue? There are many different symptoms and causes.

Also, there are some gaskets around the spark plug tubes under the valve cover. I'd replace those too. If these gaskets dry out and leak you'll have oil around your spark plugs.

FYI: Some symptoms of a failed PCV (pulled it off a random page via a quick google search)

a rise in the pressure of the internal engine
failure of seal/gasket
leaking oil from the engine
emission of black smoke
construction of the sludge under the hood
wetness under your hood
engine surge
frequent lean fire
oil discovered in the maf sensor
increased oil consumption rate

Last edited by belcom; 03-29-2022 at 11:29 AM..
Appreciate 0