I have a 1991 940SE with a turbo. 237,000 miles. The body is almost perfect. The previous owner said he had the front seal replaced, now the rear seal leaks. It was blowing oil from everywhere. So I thought, I'll just clean the flame trap and fix the leaks and everything will be great. Wrong!! I took the breather box off and it was fairly clean. The Y piece was a little stopped up so I put a new one on. I put a new hose from the Y to the throttle body, I cleaned the port in the throttle body. the hose from the Y to the air intake hose looked new but I cleaned it out, it was a little gummed up. I checked the air intake hose from the box to the turbo by sealing the ends and blowing in it gently with the air compressor, no leaks. I sent the turbo for a rebuild but it couldn't be rebuilt. The seals had blown and it had gotten hot. New Garrett turbo is on. It runs great!!!! But... it still fails the jiggle test. I checked the compression, thinking maybe a cracked ring. Exactly 140 lbs on all cylinders. The spark plugs burn white. Very few leaks now but it still fails the jiggle test. Any suggestions??
I went by a reputable Volvo shop and the guy said 140 lbs is low and its blow by,those engines are only good for 200,000. I don't believe it.

re: "...it still fails the jiggle test...."

The jiggle test doesn't apply to the B230F-K and -L engines. Reason is that the cap is plastic and too light -- use this test only on B23 and B21 engines that use the older metal caps.

Just as easy, reliable, and it works on the B230s, is to just lay some cellophane or plastic kitchen wrap over the opening and see if the membrane bows inward (suction = good) or bulges outward (pos. pressure = bad).

A red block is only good for 200K miles? My '93 945T has 210,000 and still tight as a drum. (No oil burning/original turbo) That guy's smokin' something!

Did you clean/clear the brass nipple on the intake manifold? (The one that's on the manifold end of the manifold/flame trap vacuum hose.)

Jeff Pierce
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'93 945 Turbo (201K miles), '93 945 (140K miles/I maintain for a family member), '93 945 Turbo (sold w 145K miles), '92 Mercedes 190E (174K miles), '85 Jeep CJ-7 w/ Fisher plow (225K miles), '53 Willys Overland w/ Fisher plow (sold to a loving home)