[jryerson]

after a valve job engine teardown the turbo scavenge pump seems to not be pumping or working at all, getting oil in my exhaust and it leaking around the turbo, the breather hose from the turbo oil tank is returning oil back into the oil tank which shouldn't be happening as well thus building pressure in the oil tank also. My mechanic has tested the scavenge pump by taking the line from the oil tank on the turbo off and filling a container full of oil to verify its not working, a mechanic that screwed up my car before never put the ball bearing that restricts flow in the banjo for the turbo oil supply so it was dousing the turbo with oil and probably caused cavitation and maybe killed the scavenge pump.

My mechanic also tried to prime the scavenge pump to no success, anyone ever have one fail? they seem very robust as a gear oil pump so doesn't make sense car only has around 70k orig miles on it

Thanks in advance