I just changed the oil and filter (LF9009) on my 350 ISC engine. When I restarted I lost pressure and after a quick shut down found a lot of oil had leaked out around the filter which I believed was tight. When I drained my oil catch pan into the empty gallon bottles I found a rubber ring which is 4 1/4"OD X 3 7/8" ID X 7/16" high. As I had already tossed the old filter I do not know if it is the seal out of it or it is one I need to put back above the filter as original or new replacement.
I am waiting for the oil that leaked to clear up so I can get back under to see what I can see. Any ideas? I have changed plenty of oil and filters and never had a problem before. Maybe diesels are different but I cannot imagine that.
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I just changed the oil and filter (LF9009) on my 350 ISC engine. When I restarted I lost pressure and after a quick shut down found a lot of oil had leaked out around the filter which I believed was tight. When I drained my oil catch pan into the empty gallon bottles I found a rubber ring which is 4 1/4"OD X 3 7/8" ID X 7/16" high. As I had already tossed the old filter I do not know if it is the seal out of it or it is one I need to put back above the filter as original or new replacement.
I am waiting for the oil that leaked to clear up so I can get back under to see what I can see. Any ideas? I have changed plenty of oil and filters and never had a problem before. Maybe diesels are different but I cannot imagine that.
that is the size of the oil filter gasket that should be on the top of the new filter. take the new filter off and look for the gasket. if it is not there put it on and reinstall the filter.
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tommy wilson
1996 kountrystar
spartan mountainmaster cummins 8.3L
Thanks Tom, If that is the case then I believe it is off the old one and it is not tight enough. However I will take the filter off and check it in a day or so.
On the LF9009 I crank them as tight as I can by hand (both hands), then give them a nudge with my filter wrench. They can standard more torque than the automotive filters.
I found it was the gasket, never had one fall out before. Replaced it, bought a nylon loop strap wrench for 1/2" drive and tightened it, no leaks now. Thanks
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