Help: Loud clacking/knocking

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Joined
Sep 2, 2008
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Hi all,

Desperately need some suggestions here. I have a 97 1HD-FT japanese import. Have done the fuel pump sometime back but there was a persistent nozzle clatter - or at least I thought it was and I just replaced all the nozzles. The nozzle removal and installation was done at a pump shop and the nozzles were all at spec in terms of opening pressure etc.

The problem I have is that after this replacement - the mild nozzle clatter that I had has now been replaced by a loud clacking / knocking - and I am completely perplexed. When I put my fingers on the injector pipes - I can feel a tapping on pipe number 3. Any suggestions ? Could we have somehow replaced the injectors incorrectly ? Any ideas - please ?
 
X3
if your timing is advanced to much causing your knocking sound youll be looking for pistons next
 

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