Thread: AOS - Question
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Old 09-13-2016, 10:01 AM   #40
911monty
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Join Date: Oct 2014
Location: California Central Coast
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Garage
Quote:
Originally Posted by Muskoka Minute View Post
I'm going to check/adjust the camshaft timing tonight.
Can this be done with the spark plugs in?
or do they have to be removed? or does it just make it easier with them out


On a side note...
I found a used Durametric - Professional for $575 US plus shipping....
Seams like a lot of money...

I don't know what to do?
How imperative is it to have one?
Finding TDC is much easier with the spark plugs out. An easy method to determine TDC on the bank you are on is about 180 deg before TDC (pin location on crank) place something finger, palm etc. over the #1 cyl plug hole (you can even use your compression tester). Then rotate to TDC you will feel/hear the air escaping if you are on the correct cylinder (Rotate crank 360 degrees to check bank 2). DO NOT ROTATE CRANK BACKWARDS.

Personally I would wait on the Durametric until you confirm cam timing. And I see no reason to purchase a professional version unless you plan on advanced application such as writing/changing code to the DME. The Enthusiast will do everything you need to do and is new from Durametric for around $285.00 and is good for 3 cars and maybe more.
Again my .02 cents. Now where are the experts??? JFP, Jake I'm absolutely certain they have experienced failure modes due to failed AOS.

Last edited by 911monty; 09-13-2016 at 10:11 AM.
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