I have posted a collection of photos in Google photos. https://photos.app.goo.gl/dVDk53LbvAdu3K6f9

Unfortunately the sequence and notes are gone, but I hope it’ll still help some folks. The car is still doing great with cold A/C and it’s August 2025.

The Red Brick has 285,335 miles on it now. The P0455 was a bad purge valve. It was annoying that I took the car for diagnostics and they proclaimed my purge valve good. Sure it was “clicking” when energized, but it wasn’t sealing. I took it off to bench test and realized what was going on ...

I was re-reading this thread and realized I never closed the loop on the coolant issue. I’m happy to report that my coolant leak was just a loose clamp. It’s been well over a year. I am back in Tahoe again with the family in the red brick. The car now has over 282,000 miles and running like a champ ...

I guess I didn’t wrap this story. I ended up selling my car to a pick-n-pull for a few hundred bucks sine they would pick it up from the tranny shop. We have replaced the car with the most reliable brand the last few years running. So now, the only Swedish ride I have is our V70 wagon. It’s our main ...

I am ordering my 3rd replacement from URO. It was actually one of the very few things I would ever consider from URO. I bought it because there was no other option and it was cheap. I way re-enforced mine with plumbers tape straps at the point where they always break. It was actually a decent fit ...

The interior of our 1998 V70 is starting to show it's age. Not a month goes by when some new piece of plastic just cracks, leaving an unsightly sign of wear and tear. I've been looking for a place that has a selection of parts to replace odd things like those little caps on the grab handles, or the ...

Well, the XC90 has done remarkably well, until today. After a long week of multiple trips over the Santa Cruz mountains and a San Francisco day over the weekend, it was time to drop our visitor at the airport. The car made it to the airport and then after the dropoff, it wouldn't go into gear. I ...

Main checks are:

1) Water pump drain hole (did you replace this when doing the head)?
2) Check for residue around the header tank cap (leaking cap) and also for cracks in the header tank on the under side and around the level sensor.
3) If a turbo, then the turbo cooling lines
4) Check the pipes ...

Thanks for the pictures. I've been fighting a similar issue for years. Yes, you read that right. Years. I replaced my Evap core years ago and took apart the dash just like you. The thought of doing that again is daunting. I recall it took me a whole long weekend. So I've been living with a faulty ...

Are there good part numbers to which to index this thread??


I recently came across a Professional Parts Sweden Thermostat Housing which fixes the plastic breather breakage problem!
I ordered mine from PartsGeek for about $82.

2004 Volvo XC90 Thermostat Assembly
Brand Professional Parts Sweden ...