The engine in the old VW Jetta will be the Volvo/Renault/VW engine --
23:1 compression ratio, prechamber, solid "lifters" -- the cam runs on
top of the valves directly, acting on a steel disk in the "bucket" on
top of the valve, just like Volvo gassers.
They have a rotary distributor pump, and that is the only problem I've
had. They are sensitive to low sulfur fuel, among other things.
Drive gently until it's warmed up, since it has a "cold start" device
that advanced the timing cold. Hard driving cold will wear out the
upper cylinders.
Otherwise, they tend to run about 200,000 miles between rebuilds.
Peter
