Thread: AOS - Question
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Old 09-12-2016, 12:35 PM   #38
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
Not yet.
I have to do some more research on how to do that.
I'm also going to check the water pump tonight on the off chance.
I don't think that noise is from the WP. My thought is that something Mechanically changed between the crank position sensor and the cam position sensor after AOS failure. Possibly from hydrolock, but first thing you need to confirm is mechanical integrity. Since the CPS gets signal from the flywheel which is bolted to the crank it is pretty safe to assume that didn't change. The mechanical relationship between cams and crank is maintained by cam chains and their tensioners. The cams could have slipped at their adjuster plates or the cam chain tensioner and/or ramp could have failed. Either one of those scenarios would cause the cams to be retarded. However with the noise from the engine, cam chain slop is more likely. Both of these can be visually confirmed or eliminated by checking the cam timing.

Last edited by 911monty; 09-12-2016 at 12:52 PM.
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