Howdy again, all...

Our 1989 240 still has an oil cap that does not pass the "jiggle" test.. it bounces around like crazy when resting on the opening, and you can tell that there's a lot of pressure on it. The car runs fine. This is our second 240 and those of you that remember me know that I go through these cars pretty thoroughly when I get one. On this one, I've replaced the breather box and flame trap, associated vacuum hoses, intake manifold and throttle body gaskets, cleaned the throttle body, and we just put a new fuel pressure regulator on it and changed all the fuel injector seals.

What else could be causing the excess pressure? I'm worried about the car blowing out seals while my son is away at college; he's taking the car back with him again tomorrow morning. Any ideas?

Thanks..

Barry

Oh... another thing... volvo dealerships, including Tasca, can't get the steel 14" wheels for this car any more. If you have'em, treat'em nice or sell'em to me. . I'm going to go look at another 240 in about 30 minutes.. wish me luck!

The jiggle test does not work well with the all plastic oil filler cap.
Dan

Thanks, Dan.. I had read that in a few of the other archived threads, too. This is more than just a light plastic cap rattling around due to vibration. If you remove the cap from it's fully closed position while the car is running, there's a definite force driving it upwards... almost an audible pop like opening a champagne bottle, but nowhere near that loud fortunately... nor as festive.. ...."Hey, let's celebrate... pop open that oil cap!"

Barry

What oil you using on an older engine maybe try 15/40 that may help?

You did all of the external work, but now you need to worry about blow-by or valve stem seals. Did you do a compression test, leak down?

You replaced the vacuum lines, but are the manifold openings clear? They can get clogged badly.

If the 'new' 240 is better, let your son take that one to school.

Klaus
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Volvos should be saved from the junk yards, not donated.

Thanks for the quick reply, Klaus. I never did any compression tests; I don't have the equipment, and I just figured since we weren't burning any oil and the cars were running well that we were OK. I could be wrong.

I just pulled the small nipple on the manifold where the smaller hose from the flame trap connects, and that was clear too.

We had been getting error codes 2-3-1, 2-2-1, 1-1-3, all relating to running too lean or rich under load and partial load. That's what led us to replace the fuel pressure regulator and injector seals. Put about 30 miles so far on the car, and the code remains 1-1-1. I doubt that has any bearing on the crankcase pressure, but at least it's a small victory there so far.

I realize there's been a bunch of threads similar to this one; I did a search, but didn't see anything other than suggestions to replace the stuff I've already replaced. Maybe I missed something... all ideas would be gratefully received.

Klaus, sending my son back to school with a new-to-me Volvo would be a very scary proposition, even if it were physically possible by tomorrow morning when he has to go. I'd be very hesitant to place a used vehicle into daily driver service until the prerequisite "replace everything I can see that has been known to fail, plus all fluids" routine I go through when I get a 240. I HATE being stranded. I hate stranding members of my family even more... ...

Thanks again,

Barry