In Reply to: Re: Rich oil mixture??? posted by Mr Z on February 26, 2001 at 09:19:43:
Check to see the year of manufacture on the head itself. It is on the intake side on the front end of the head. If it is pre '81 then chances are it is a crack in the head. This happened to me a couple of years ago. You need to replace the head with an '81 or newer. BMW fixed the problem with the new style head. Depending on where you are I do have a new style head to get rid of.
ps goto www.seniorsix.org for more info.
I'm a newbie with a question: my girlfriend recently purchased a '75 3.0Si that idles roughly and has a strange oil/ coolant mixture in the radiator reservoir.
A mechanic tried flushing out the system but the problem returned immediately. He says it could be a leaky head gakset or cracked cylinder head and that the oil's running rich. I haven't noticed any smoke coming from the tailpipe at starting.
Before I take it elsewhere and spend money unnecessarily, any diagnoses?