Camshaft position deviation results......

[Steve Tinker]

I'm just about to start my annual major service and inspection on my '02 Boxster S.
Before starting, I plugged in my trusty Durametric (what a great tool that is) to check for error codes (non found) and going through the menue I checked a few parameters like fan operation, voltages, etc.
I also checked an item called "Camshaft Position 1 Deviation" and "Camshaft Position 2 Deviation". When checking these (obviously with the engine running @ 800rpm) I got:

Camshaft Position 1 Deviation = -5.26 *Crk.
Camshaft Position 2 Deviation = 0 *Crk.

Anyone know what Camshaft Deviation & these numbers mean?
Do I have to worry??

I THINK its the cams retarded @ idle revs before the Variocam kicks in, but......

[JFP in PA]

Do you have the acutal code numbers? Easier to research that way............

[derb]

The Porsche manual says 0 degrees, +/- 4 degrees at idle.

[jhandy]

Jake raby measured the same thing with my car if I am correct it was 5 Degrees off. What it turned out to be was the chain tention pad worn, allowed the chain to jump a tooth.

The result was a little loss of power, I would suspect that more would result in the valves slaming into the pistons.

I would contact Jake and ask him.

[Steve Tinker]

This dosen't look good - I'm a hell of a long way from Jake, but perhaps he can shed some light on the results.

JFP - I saw no code numbers as I was just scrolling down the Durametric menue, ticking the appropriate box I wanted the tool to interrogate. Ticked the Camshaft Pos #1 and #2 Deviation and it came up with the -5.26 and 0 results.

Is there a more positive way as determining chain tensioner wear or damage? Would a worn tensioner pad show up debris or particles in the oil filter?
I was about to change the oil & filter anyway....

[JFP in PA]

Originally Posted by Steve Tinker

This dosen't look good - I'm a hell of a long way from Jake, but perhaps he can shed some light on the results.

JFP - I saw no code numbers as I was just scrolling down the Durametric menue, ticking the appropriate box I wanted the tool to interrogate. Ticked the Camshaft Pos #1 and #2 Deviation and it came up with the -5.26 and 0 results.

Is there a more positive way as determining chain tensioner wear or damage? Would a worn tensioner pad show up debris or particles in the oil filter?
I was about to change the oil & filter anyway....

Typically, yes, you should see some debris in the oil or/and filter; usually small plastic bits. You can see the wear pad on the upper (billet) tensioner from LN Engineering..........



What you don't want to see is this, as it comes with a lot of other headaches: