N42 - Spark plug fouled with engine oil

[softmuffin]

Greeting,Just replaced my spark plug pipe O-ring (big and small) for cylinder 1 and 4 and new valve cover gasket but still unable solve the issue. Should i apply gasket sealant to O-ring? Cylinder 2 and 3 no problem. Anything else that i missed? Many thanks guys

 

[anaksarawak]

I have the similar issue. I believe there two possible reasons

1. O Ring is wrong or no sealant applied during installation

2. Valves seal also O Ring that need to be replaced.

 

[softmuffin]

Im checking with my friend to confirm the O ring size that i purchased from Bomin.

03 O-ring 30,2X3,0 4 11377514007 $1.27
04 O-ring 25,3X2,4 4 11377514008 $1.81

 

[Volvos525i]

Just my 2cents since also newbie in here...
Normaly eng with centre spark plug the supressor is long the upper cap must be very tight n also the cylunder head cover gasket must be fitted properly...
Just my 2cents yaaa....

Aku ada stereng bas ko adaaa....