Babymog's post is spot on as far as I can tell.

I just rebuilt the pump on my car and when the engine is running you can look into the pump reservoir and see a stream of oil coming out of the return line (top of my reservoir) when the engine is running. If you do not see oil returning to the tank then your pump may be bad or a clogged line some where in the system.

If you are trying to get your SLS sorted, you might want to replace the seals on your pump while you are at it. Not a hard job and given the age of these cars I suspect your seals are as hard as rocks (mine were like hard plastic after 24 years.

If you want to buy a seal kit with instructions, call this guy and order a kit

George Murphy

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