Engine PCV Box Oil Separator Diaphragm with Spring Compatible with S40 V50 C70 Code p0174 p0171 Replace 30684381 30788494 31338684 31338685

works fine, and fits like the original to Volvo s80 t5 2008 make.no more oil leaks or white smoke.

The part arrived on time, however, that is the only good thing. When the part arrived, I inspected the part which appeared to be identical at first glance. When I held the new PCV cover up to the original PCV cover, I noticed that the outer diameter of the New PCV cover was noticeably larger than the original. Inspecting the diaphragm in the new Cover, it appeared that it was slighter smaller, and less robust than the original diaphragm. I went for it anyway to install, since my original cover had a crack. Immediately as it tried to press the cover on, it was obvious that the new cover was not going to stay in place as it was slightly too large. Not sure what is going on with quality control, but this did not work on my T5 Volvo. YES IT DID look the same at first glance when I opened the package...this one is going back regrettably as it would have been a great deal if it fit!

My son’s V50 was howling and stopped when I took off the oil filler cap. Pulling super strong suction through oil filler. Read that these diaphrams go bad and need replacing. Pulled air box to the side and popped off with stiff putty knife getting leverage on oil filter cap. Reused original cap but this replacement looked exact same. Lubed the lip of the PCV body with petroleum jelly and carefully positioned in place with the notch lined up and pressed down with 1/2 ratchet wrench levered off engine tab. It seated all the way round and totally fixed problem. Time will tell how long it lasts. I’m happy with purchase.

Solved the problem on our 2012 s60 T5

Spring and diaphragm work, but cap is not a snug fit. It will cause your car to throw a CEL. You will need to reuse the original cap, if it isn’t damaged, or find a replacement cap at a junkyard to use with this spring and diaphragm.

worked well

It sits very loose and wiggles on top. Each manufacturer has seem to forgot to extend the tab like on the OEM cap... Either I will glue it down and try to drive as a last ditch effort. Otherwise better of buying a new assy.UPDATE: After gluing it down with permatex ultra black gasket maker and using some spring clips + a wood block the issues had still persisted somehow. The seal was created but seems as if the product was not working.

The Diaphragm fits perfectly, The cap however does not fit at all. I had to use the old one again.