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I had great oil pressure for about 15 minutes of run time when my oil pressure dropped to zero. I checked the normal o ring issue but that was good so I decided to pull the oil pump and this is what I found. Any ideas on what went wrong before I replace it? I don't want the same thing to happen.
Could the crank be bent? Any chirping belt noises or wobbly balancer? That's a head scratcher. When you find out, please inform.
Put a dial indicator on the surface of the crank where the oil pump rides (one with magnetic base will be fine), and rotate the crank 360 too see what the run out of the crank is.
Up to .002"'ish is normal, but if you are in the .006" or greater range of run out, crank snout is too far bent and will need to be resolved.
Note, if you did have the crank polished at rebuild with block prep, they should have checked the crank for run out, and the problem may be that you have too much lash in the main bearings that is allowing the crank to jump around too far, if the crank is in spec for run out..
Put a dial indicator on the surface of the crank where the oil pump rides (one with magnetic base will be fine), and rotate the crank 360 too see what the run out of the crank is.
Up to .002"'ish is normal, but if you are in the .006" or greater range of run out, crank snout is too far bent and will need to be resolved.
Note, if you did have the crank polished at rebuild with block prep, they should have checked the crank for run out, and the problem may be that you have too much lash in the main bearings that is allowing the crank to jump around too far, if the crank is in spec for run out..
that was my next move I just had to walk away from it for a while
I'm curious to know if you have owned this car for a while and therefore know the history as to why the crank snout may have become bent.
well the motor came out of a low mileage wrecked CTSV. It didn't appear to have any damage at all however I did take it apart and put all new bearings, rings, gaskets, ect. I checked the crank but not at the front. Everything seemed to be in great shape. I am guessing it was a front end collision and hit the pulley. Lesson learned on my part
Oil pump failure
any idea how it happen?
