Is there a known problem with head gasket failures on the 1990 - 1993 2.5 Turbo Diesel engines? If so what are the issues and fixes?

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Den
1993 MB 300D 2.5
2001 VW Jetta TDI 5 spd.
2001 new bug TDI 5 spd.
Motorcycles

My friend's '91 300D blew its head gasket, but it fooled him.

It acted like the first piston was cracked and/or the head was cracked.

In reality the head gasket was blown on the inside, between the chain and the first cylinder.

His car has about 197,000 miles on it.

It runs great now....

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John

1995 E320 - 115kmi+ Smoke Silver/Cream (Wife's Wagon)
1989 260E - 195kmi+ Black/Grey (My Panther)
1984 300D - 242kmi+ Black/Palomino (Retired)