Found out today I've got a blown head gasket
Just did this about 18 months ago. At that time
had the head checked for flatness & cracks and they did a valve job at the time, too.
A good shop recommended by GSXR and others in town.

Been losing some coolant. No overnight pressure in overflow tank--thought it was
just a leak somewhere. Did a coolant pressure test and it held pressure.

Did a leakdown test- no bubbles or sound in coolant
but air leaking between cylinders Also, air is leaking out the turbo from all cylinders.
Air is leaking from #4 to #3 a lot. But the air doesn't leak from #3 to #4--

Bad head?

Frustrated Jeff

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1984 300SD 300,000 miles--two tank WVO setup
2.88 diff & 500SEL anti-squat rear end