m50b25 vanos fuel but no spark

Thu Jun 01, 2017 6:18 pm

Remove the valves and clean both the valve stems and guides (blow them through with an airline, etc.), then try the valves in them again - if they slide up and down smoothly with no side play then the guides are probably OK.

Thu Jun 01, 2017 8:23 pm

But does the seal do anything with the oil in the cylinders or?

Fri Jun 02, 2017 9:20 am

Worn valve guides (or valve stem seals) may indeed cause some oil to drop down into the cylinders.

Fri Jun 02, 2017 8:56 pm

it was very little play in the valve guides so do you think i just can change the stem seals and clean and grind the valves?

Sat Jun 03, 2017 10:16 am

Possibly. Might be best to take it to a machine/engineering shop or decent garage and get them to inspect it...

Sun Jun 04, 2017 5:56 pm

Speedtouch wrote:Possibly. Might be best to take it to a machine/engineering shop or decent garage and get them to inspect it...

yes im going to take it to a machine shop. And after that it should start but thanks for all the help

Tue Jul 25, 2017 5:39 pm

Today i got the head back from the machine shop and 5 valves was bend

But now that is fixed so the head is like brand new. And i think that it was the timing thats was off a little that caused it so im gonna correct it when i put it back togheter.