Thanks boneheaddoctor, I'm not sure I know the difference between "nailing" and "knocking". But This is a metalic knock which sounds like a rod knock in a gasser. One more thing, I replaced the injector with one of unknown shape
with no change. Lee

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'83 300D 283,000 mi.
'88 Jaguar XJ40 132,000 mi.(sold)
'88 Olds 88 190,000 mi.(given to grandson)
'81 300SD 313,000 mi. (given to granddaughter)
Maintained by Me and my offspring.
ESCHEW OBFUSCATION