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No oil pressure & engine knocking sound

14K views 7 replies 7 participants last post by  Smithj5  
#1 ·
2002 S60 T5 FWD w/ 110,000 miles.

So about a couple of days ago I got home and noticed my engine was making a knocking diesel engine type sound. I turned the car off and back on and the sound went away. A day later, I through a Check Engine light. My mechanic pulled the code and unfortunately I didn't get a copy, but he did clear it and said lets evaluate if it happens again. He said typically he only hears those symptoms if there is no oil in the car. I am a quart low, but that shouldn't make a noise like that. Fast forward today, I get a no oil pressure light!

I would think the no oil pressure could be due to the oil pan, sensor or even the pump but combined with the ticking / knocking sound I heard from the motor I am quite concerned. I didn't check for bubbles in the dipstick at the time and will monitor that. In the meantime, does anyone have any ideas or thoughts on this? Thanks in advance.
 
#2 ·
Could be one or more things. These engines around that model year have issues with oil pan o-rings, and you could also have a clogged oil sump pick up screen. I don't think the oil pumps fail too much on these but I wouldn't rule that out.
 
#4 ·
it happens all the time? under hard shiftings?.
 
#5 ·
#6 ·
same exact thing happened to me. but this time is was in a motor that was just put in my car. My motor blew and I had a motor with 80,000 but in. they test drove the car after the motor replacement and put about 40 miles on it with not problems. as soon as i came to pick the car up and drove away from the shop I got identical symtoms to what you are describing here. I immediately turned right around and ask the guy what he was trying to pull on my. he is currently trying to figure out what is wrong by replacing a bunch of different sensors. IF you have any updates on this problem please let me know so i can bring them straight to my mechanic

Thanks!

-Jack
 
#7 ·
Check the oil on the dipstick. If the o-rings are cracking, you will notice that the oil seems to have a number of almost microscopic bubbles in it. First sign the oil o-rings are starting to go bad. Replace them early, or they will continue to deteriorate, and then you start having the problem where there is more air than oil being circulated, and that means rod bearings will be toast very soon.