larsianer

I have a w211 220cdi 2008.
and i have a dancing oil cap,it have the same moves as this old engine in the video link


is it blow by?, are there anything in the engine head that can cause this"valve seals?.or should i change my engine.
or test the engine compression?

Plutoe

Wow I see you finally got the heap running---yep that's the classic diesel compression blow by----you are correct do a compression test.

Additionally if you are very careful, stop the engine remove the oil fill cap and place your hand with a folded rag over the oil fill opening and have someone start the car----can you feel any upward pressure on your hand-----simply yes or no!!

kajtek1

I hope your cdi does not have the vibration old mammoth does?
Easy test for blowby is putting napkin. Good engine should not blow it.
When napkin flies, try a piece of cardboard. If cardboard blow, then it is time for compression test.
Ford owners are happy when reversed oil cap doesn't fly.

larsianer

oki, i will do that tomorrow,and report back.thanks again plutoe

larsianer

it does not vibrate,so you say that i should put alot"like 10-20" of napkins,in the oil filler opening,and start the engine,and see if they fly away?

if they do,then i should try to rip cardboard,and put in in the oil filler opening,and see if they fly??
should the napkins and cardboard be tight in the oil filler opening??

i will try tomorrow, and report back,i will take a compresion test,if the cardboard fly out.but are there any change that it is the exhaust valve seals?

thanks anyway,so no i quess that changing engine will be the next thing i need to do,i know the dude on the car graveyard,and i will get a used engine cheap, i do some work for them,"i make parts with my lathe,and fix things for them".so it will not cost me so much.

it has 444,444km today.