My friend, Nick Choy, recently installed a 1994 B230FT with piston oil cooling in his 1990 745T. Nick's car is featured on MVP's site. It wasn't too long after Nick installed the new engine that the electric gauge showed low oil pressure. Nick thought it was the sender. I told Nick that to bring his car over and we would put my mechanical gauge on his car. He had about 10 psi at idle and about 20 psi running. I told Nick it was the oil delivery tube seals.

Nick promptly dropped the pan and replaced the oil delivery tube seals. Within a week, the oil pressure had dropped again. Nick was perplexed, as he had just replaced the oil delivery tube seals, and one had failed again. I had experienced exactly the same thing about two years ago and I had the solution. This time I modified an extra oil delivery tube by building up a ridge of JB Weld on both ends. I do this by using an old oil pump for a casting mold. I use a Q Tip to put a light coat of wheel bearing grease in the cavity which the oil delivery tube fits into. Then I roughen up the oil delvery tube with a file and coat the end with JB weld and insert the tube into the cavity in the oil pump. This is covered in the FAQ. After removing the oil delivery tube from the oil pump I clean the JB Weld up with a file and make a nice, short ridge to hold the seals in place.

Nick has again replaced the oil delivery tube seals and used the modified tube. This week he is going to the Volvo fest at Thunderhill in the Davis California area.

The modified tube is shown below. The seals cannot get pushed past the improved lip on the tube.