Without a good O-Ring where the dipstick tube goes into the case, and/or
a good rubber seal where the dipstick enters the tube, you can have a
vacuum leak which would cause driveability issues.

I even found on my '84 that the oil fill tube had a bad seal where the
plastic part attaches to the metal part that caused poor running.

Mike

Roger Sisler wrote:
> I got a lifetime  suply of 0-rings. Can I pull the tube out and replace the
> ring? What if the rings I have dont fit. Can  I just press the tube back in?
>