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ISB Data Review Presented to Cummins Surveillance Panel Addendum 3 Cam/Tappet Interactions. Jim Rutherford March 18, 2011. Your have seen something at least similar to this before. We see intake and exhaust tappet wear seeming to increase with kit number or time or something.

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isb data review presented to cummins surveillance panel addendum 3 cam tappet interactions

ISB Data ReviewPresented to CumminsSurveillance PanelAddendum 3Cam/Tappet Interactions

Jim Rutherford

March 18, 2011

slide2

Your have seen something at least similar to this before. We see intake and exhaust tappet wear seeming to increase with kit number or time or something.

It would be hard to conclude an effect of reference oil blends.

slide3

Here is the same picture but with cam and tappet batches identified. There was one batch of cams (C) that ran with both batches of tappets. We can’t really assess an interaction between cam and tappet batches. Most recent cam batches were associated with higher wear. Those four tests with cam batch C could trigger a lot of speculation.

slide6

Now with camshaft wear, we again wear seeming to increase with kit number or time or something.

It would be hard to conclude an effect of reference oil blends.

slide7

Here is the same camshaft wear picture but with cam and tappet batches identified. Most recent cam batches or tappet batches (?) were associated with higher wear.