The test for valve stem seals is to coast down a hill, with high engine vacuum, then step hard on the accelerator while watching the rear for heavy smoke. If you didn’t use the set of Volvo stem seals it’s very likely your new stem seals are still leaking. The part number below saves you about 40 E...

Annoying as another post I made has disappeared! In that I mentioned a suggestion to do a glove test as suggested by Sveedy above. Put a rubber or latex glove over the oil filler with cap removed. Start the engine and see if the glove rises, does nothing or get sucked inward. If either of the first...

You didn't mention a glove test, which could tell you if you still have too much crank case pressure, even after doing the PCV. If you do, then I would suspect worn rings. 230k is getting up there.... Hi Sveedy, i didn't mention a glove test indeed, however i did do it. When idling (warm engine), t...

Hi Neil, thanks for your answer! Here's some answers on your good questions: Indeed the parts are new, not second hand or re-used. The turbo is from Mellett, UK, a well known brand. I am pretty sure the valve stem seals were original Volvo parts. I did not remove the cylinder head, we used specializ...

Dear Volvo fanatics, A few months ago I have done large maintenance on the engine of my 1994 Volvo 850 2.3 T-5. We have replaced the Turbo, PCV system, valve stem seals, and many more parts. The first time startup, we encountered excessive blue smoke from the exhaust. Turned out, a cap from the turb...