I am trying to get one thing after another fixed on this 89 760 I bought (from a friend, mind you). I have noted that there is always a smell of oil when driving - not too strong, but still there. Also the dipstick will come out just a bit with driving for a day.

I think this indicates that there is need of a good cleaning of all the lines and the breather box on the side - right? Once I get everything cleaned up - am I right that the B230F is totally closed off from the outside air, and that the smell should go away.

I am getting a bit skittish about pouring more and more money into this, and in the end still have things (like the smell) that I would not like to live with.

Almost wish I had went for the 940.
--
'89 764 (110K), '94 940T (180K) , '92 745T (totaled 2-10-05 RIP)

Well your suspicions could be correct, and you're talking about a job you can do your self at little or no cost.

Your dip stick popping out indicates high internal pressure in the engine (not properly breathing). This can also cause leaking at the engine oil seals, like the front and rear main. It will also push oil out the filler cap onto the engine and thus you oil smell.

Good new though! It is more than likely just a clogged flame trap. You can buy one for a couple of dollars, or try cleaning it. It is the hard to get to because it is under the air intake manifold at the rear drivers side of the engine above the breather box (I assume you already know since you know where the breather box is).

It slips down onto the breather box hose and then has a large and small hose fitting. You want to be careful not to break off the small hose fitting. Pull off the two hoses on the circular flame trap (black plastic piece), and pull the round flame trap out our the breather box hose. If your adventurous and cheap, pull out the brass coil and clean in with gas or carb cleaner (or buy a new one). If you clean it, you'll then have to re-wind it and replace it. Before doing that though, take something like a finishing nail and clear out the small hose fitting and make sure that all is clear.

You can pull off the breather box and clean it out with gas or carb cleaner also, but I have never found much in mine to restrict engine breathing.

It's really a trival job once you get the flame trap out (the hard part). I have taken off the throttle body to make it easier.

Cheers

Gary

Thanks for the info. This one does not have a flame trap, being a turbo. I am suspect that years of low miles driving and suspect maintenience have contributed to a real need of cleaning the lines and breather box. I am just hopeing that with proper breathing all will return to normal.

Thanks again
--
'89 764 (110K), '94 940T (180K) , '92 745T (totaled 2-10-05 RIP)

Sorry, did catch that it was a turbo. I also have 1991 turbo and have not had that problem. On thing to check though is the hose from the AMM to crossing to engine to the air intake manifold. If not tight can pickup oil and spray it.