Lonesome

I do not have a greasecar system but i have a home built system and experienced the same problem.

I ended up putting the filter on the pressure side of the lift pump and running all my fuels through a single spin on type filter.

Oil is never left in the filter so i do not have to heat the filter as diesel flushes it at change over.

For some reason when the filter was on the suction side of the lift pump it would suck air in and cause stalling and rough running during change over of fuels.

This solved the problem of sucking in air although it extends my change over time a little.

It now works flawless.

I did loop the returns sort of.

The diesel is looped right at the pollack valve to avoid oil getting in the diesel and the oil side is looped at the rear tank so it gets heated on the suction hose in hose and return HIH.

Tough to explain the whole system but if i can draw a diagram and figure how to post it i will.

my system really works good getting the oil to around 170 degrees.

I am thinking of adding a second selector valve and filter to keep the oil and diesel filters seperate.

I did away with the stock filter and used a 10 micron spin on full flow furnace filter.

The filters are 6 bucks cheap at the local plumbers supply and last a long time.

Steve

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85 300d in progress