Injector pump timing would change as the timing chain stretches. Chain stretch is inevitable, but can be affected by driving style and maintenance habits. I would check IP timing maybe every 75-100,000 miles. But, I doubt IP timing would have much effect on the quality of the engine idle.
Mark in Lakewood, CO
From: "williamc" <wmcowart@yahoo.com>
To: "diesel mercedes" <diesel_mercedes@yahoogroups.com>
Sent: Sunday, June 24, 2012 8:44:09 AM
Subject: [diesel_mercedes] Idle, Viberation Question
From: "williamc" <wmcowart@yahoo.com>
To: "diesel mercedes" <diesel_mercedes@yahoogroups.com>
Sent: Sunday, June 24, 2012 8:44:09 AM
Subject: [diesel_mercedes] Idle, Viberation Question
Recently we did a way over due valve adjustment, making a world of difference in preformance.
We are talking an 83 300SD, 5 cylinder. It has always had a bit of viberation at idle. But since the valve adjustment, the viberation is really high at idle. This causes me to think and wonder, how often does the injector pump need to be adjusted ? And if slightly out of adjustment, would it effect engine viberation at idle ? Bill C
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