Oh, anther thing, last summer when during a camping trip with the 4 kids with a trailer in the mountains, the engine oil disappeared and the engine stopped. After 15 minutes the oil came back by itself magically and I could resume my trip. I did an oil change when back home and it never did it again. Can this be a symptom of the PCV system failure ?
Was this engine oil pressure? Probably a sensor glitch but definitely watch this carefully
Under load, you have seconds to shut off an engine without oil pressure before damage
An XC70 will run 500,000 km if you care for her, cheaper than depreciation of a new car by 3x
The engine shut off by itself. Then I looked at the dipstick and it was dry, but as time went by, the oil started to come back and the level on the dipstick raised until it was back to normal maybe 15 minutes or so after the engine shutdown. At that moment, I started the car and everything seemed normal. From there I looked from time to time and the oil level on the dipstick was always good. I never had the problem again, but I never had to push the engine so hard either.
Right after the engine is shut down, the oil is spread all over inside the engine galleries, engine head, etc. It takes a few minutes to drop back into the oil pan when it will show again on the dipstick (the dipstick will measure only about 1L at the top of the oil pan). But if the oil took longer to reapear on the dipstick, I would indeed suspect perhaps a faulty PCV system, perhaps the oil gets trapped inside the PCV box? I would replace it, even if the box feels empty when removed. Is this the turbo engine ? The PCV kit is a little expensive
The reason the engine shut down by itself is however elsewhere.. You mention you were pushing the engine hard at that moment, I would perhaps verify the PEM module (google) for corrosion, maybe even the FPS - but others will come with more suggestions as well hopefully. remember that the fuel pump on these cars is very durable but mechanics who don't know Volvo may replace them for no reason. May as well replace the fuel filter if it's the external type one
Just before the engine shut down (like 5 seconds before) I had a red warning that the car was low on oil... So I have the impression that the problem was the oil getting stuck somewhere.
My engine is naturally aspirate (no turbo). I've looked at the video on how to replace the PVC, it seems quite a job... I'm not sure I'm brave enough to do it myself. How much should I expect to cost it I have it done by a mechanic ?
Oh and I also looked for the timing belt / water pump replacement. It doesn't look to bad on the video, but anyone have an idea of how much time it could take me to do it myself ? My mechanic is telling me 3.5 hours + 400$ (CAN)to do the job. I have the impression that is it a bit excessive..
Also, on one of the videos, I saw that the guy put some kind of silicone glue on the gasket (I forgot the exact name, but it was yellow on the pump side and red on the engine side). I'm a bit surprised because I thought that you wouldn't want to put anything on a gasket to ensure you have good sealing. Does someone have any opinion on that ?
Abscate, you are frightening me ! I thought that since it is protected the bolts will likely be easy to remove... but broken bolts are my nightmare ! I don't know yet how to deal with that... You really think that I could have broken bolt changing the timing belt ?
Thanks Ratnalle. 3 hours for a first time, that is encouraging. I need to think about it... and make sure that I don't risk to brake some bolts !