NEW TO DATSUN DIESELS & CANNOT I.D. MY ENGINE

[dhp123166]

I purchased an '80 Datsun 720 Pickup that someone dropped a diesel engine in.

It does not look like an SD-22, SD-23, or SD 25.

It looks like a Maxima diesel engine minus 2 cylinders.

I think I need a head gasket for it as I am starting to see black specks and oil tendrils in the coolant.

The head and exhasut code are "W17". The block numbers are covered w/ grime.

I did search and cannot find anything about this, anyone?

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[dhp123166]

LD- 20 Belt Driven

Should a searched a little harder.