On Saturday I got the 960 running for the first time. All is in good order and want to says thanks for all the help. Tim and Jim, big thanks to you guys. As you know I have had some problems with no oil psi after I got the 2.9l back together. I thought that the oil pick-up was plugged with slug or something. I know I did not want to drop that oil pan so I figured that I had nothing to lose by trying to clean the sump. I put in 6 quarts of the gunk parts cleaner (comes in 3 qt cans) thru the dipstick hole and let it set for 2 days. When I drain it the oil sump was spic & span! I flushed it with oil, then tranny oil, and then with oil again. I then filled two caulking tubes with mobil-1 0w-30 oil and with a rubber stop (with a center hole) pressurized the oil system thru oil filter inlet. I put the filter on, filled the sump with oil, and cranked the engine. No oil psi! I had to know what the heck was going on with this no oil psi. Still not wanting to drop the pan I went after the new oil pump. When I got the pump off it did not look right to me. What I thought should be the oil psi relief valve looked strange. Never seeing one of these before in the new Volvo engines I was not sure how it was suppose to work. What I found was a cylinder in a cylinde with a spring going thru it. I went to Volvo and ordered everything I could (execpt the pump) that was associated with the pump. It was clear when I got the new parts. The inside cylinder used to be a piston. The wire snapring chipped away at the piston top everytime it would hit the stop. Since the relief valve is made out of PLASTIC with the force of the spring behind the piston top, it was chipped away until the spring blew the top on the piston off! No oil psi. The new piston is made out of steel. So this will not happen again. This was a new oil pump that had this plastic piston in it. I am told that the 850's use the same pumps. My sisters 850's oil pump took the big vacation about 2 years ago and I wonder if this was the cause. The casting date stamp on the oil pump in the 960 with the plastic piston was 98. So formational purposes, the next time you do a timing belt, you may want to check to make sure you do not have a plastic piston relief valve.