camshaft deviation analysis

[Jake Raby]

Sounds to me like both engines need need wear pads on the cam adjusters. We see these worn at as little as 35K. These had 30K on them with a female driver, which is the catalyst for this wear in so many cases.
These were resulting in cam deviations of 9 degrees. Of the last 20 IMSR procedures we have done on 5 chain engines, 75% of the engines did not pass my pre-qualification due to excessive cam deviations that were created by these components being worn. We will not carry out an IMSR if cam deviations are in excess of 3 degrees, because the car will set a CEL after our work is done and then we have to explain that the issue was not a result of our work.
The 3 chain engine omitted these completely.

[JFP in PA]

Originally Posted by Jake Raby

Sounds to me like both engines need need wear pads on the cam adjusters. We see these worn at as little as 35K. These had 30K on them with a female driver, which is the catalyst for this wear in so many cases.
These were resulting in cam deviations of 9 degrees. Of the last 20 IMSR procedures we have done on 5 chain engines, 75% of the engines did not pass my pre-qualification due to excessive cam deviations that were created by these components being worn. We will not carry out an IMSR if cam deviations are in excess of 3 degrees, because the car will set a CEL after our work is done and then we have to explain that the issue was not a result of our work.
The 3 chain engine omitted these completely.

Jake, do you replace them with the superseded OEM part, or do you have a better replacement part?

[desert_porsche]

Originally Posted by Jake Raby

Sounds to me like both engines need need wear pads on the cam adjusters. We see these worn at as little as 35K. These had 30K on them with a female driver, which is the catalyst for this wear in so many cases.
These were resulting in cam deviations of 9 degrees. Of the last 20 IMSR procedures we have done on 5 chain engines, 75% of the engines did not pass my pre-qualification due to excessive cam deviations that were created by these components being worn. We will not carry out an IMSR if cam deviations are in excess of 3 degrees, because the car will set a CEL after our work is done and then we have to explain that the issue was not a result of our work.
The 3 chain engine omitted these completely.

Jake,

When you say female drivers are the "catalyst" for wear, to what are you referring exactly? What is it that females do wrong? So I can be sure I'm not doing the same thing