OM617 nailing after injector service?
OM617 nailing after injector service?
Could it be a delivery valve or something? I'm an accomplished mechanic (I work on piston airplanes for a living), but am still learning about mechanical diesels. Any thoughts?
1990 Jeep Wrangler
'85 OM617.952/KKK K26/MW pump
OM617 turbo. Had some minor nailing and was preparing for a tune, so I decided to do an injector service. Had some slight "pissing" before pop on all five injectors. Brand new Bosch nozzles, all five injectors cleaned and lapped with a perfect, clean pop at 1850-1950 psi. Also reamed the glow plug holes at the same time. Got it all back together, and it runs GREAT. More power, better throttle response, easier starting, BUT even MORE nailing when cold, much louder, but goes away almost entirely when at full operating temperature.
Could it be a delivery valve or something? I'm an accomplished mechanic (I work on piston airplanes for a living), but am still learning about mechanical diesels. Any thoughts?
1990 Jeep Wrangler
'85 OM617.952/KKK K26/MW pump
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