Reference pictures on how the ignition rotors are pointed for when I assemble everything back together.

 

Eeekk a Contitech belt.

 

OMG! lol.... These are reference pictures. He will have a gates belt in there.

 

Yes the Gates will be in there when done. i won't throw a new belt in with the way that driver cam gear looks though.

 

Okay, I know I have 2 threads going now for a single cam gear (including this one). I'd like to extend the question of anodizing, even though I can feel grooving on some of the teeth. If it's re-anodized, won't they strip the old coating off, with the new coat smoothing everything out again?

 

Tricky part is if the underlying material is worn versus just the coating. Personally I had a set recoated (finishlinecoatings.com) and they turned out great but hadn't worn too badly.

 

What was the name of the coating? I may call them for a quote.

 

Andy:

Let me know when you are ready to do cam timing. I Have Ken's tool and will come over and help out with that.

 

Believe 'dry lubricant film'. It wasn't expensive, did a great job and turn around was quick. Up in Oregon.

 

Dan ("Foz") used a local place with good results. If the tops of the teeth are dished and/or have sharp edges, I wouldn't coat them. If all that's wrong is the coating is gone in the centers, then I suppose they can be coated after removing the old coating, but I've never had it done.

 

Hey Bill, will do! Thanks for offering to help!

On a side note, the timing belt is out and I celebrated a little early.

 

Warsteiner is a good choice for a TB job

 

Currently in the process of having camshaft sprockets, lub oil sprocket and crankshaft drive sprocket for the the S4, coated with Cerakote Microslik C-110 ambient-cure ceramic dry film lubricant which is a division of NIC Industries Inc.

Address NIC Industries Inc
7050 Sixth Street
White City OR 97503

Phone: 541-826-1922
Fax: 541-826-6372
Web: www.nicindustries.com

They also have Creakote Microslik P-109, which is a baked on ceramic.

As per my previous recent thread on this subject, I advise that I'm currently undertaking a study/investigation on the timing belts' sprocket and belt geometry of the camshaft drive and driven sprockets, to ascertain what condition the camshaft sprockets need to be in to be suitable for refurbishment. This study will also try and ascertain the maximum wear limits of the sprockets and the clearances between belt lobes and sprockets.

I will also investigate whether the whole of the sprocket needs to be medium blasted or just the sprocket tooth area, thereby saving money.

I have actually seen camshaft driven sprockets that has been nearly completely worn down to slight "bumps" and the engine was still being operated. Unfortunately I do not have photographs of these sprockets.

The camshaft sprockets and belts are 8mm Synchronous Curilinear tooth HDT belt profile for the later MY 928s , whereas the older model 928s had Trapezoidal belt profiles.

At the completion of my investigation/study it is my intention to write up a full specification on how to prepare and coat the sprockets to be handed to the contractor for guidance (if required). from the surface preparation, racking, gas out, check list before spraying, spraying procedure and air drying or baking depending on what grade of Cerakote used and in addition some words on the belts geometry and the clearances between the sprockets and the belt lobes.

 

Andy......a pic of what I replaced on the GTS this winter

your welcome to any of the parts for the shipping:

 

Thanks guys! Jim Devine on this board gave me cam gear at Sharks at the Park today to replace my bad driver side one. I can get another four years out of it, then shoot for some new ones in 2017.