Cammer chain idler and tensioner bearings

[338Raptor]

Does anyone have part numbers for the chain idler and tensioner bearings?

[jayb]

Reading the bearings that I have, the fuel pump gear gets a 6205 C3, and the stub cam nose and idler arm gear get a 6204 C3.  The box for the the stub cam nose and idler arm gear says 6204-2NSE9.  Hope that helps - Jay

[338Raptor]

Yes that helps.  Thanks.

By the way, before he passed away I spoke to Jim Greene about modifications he did to his cammers.  He mentioned modifying the mounting location of the idler gear pedistal/base to prevent it from tilting or flexing under load. I believe he attributed the flex from the gasket under the center of the pedistal (behind the back plate) with no support on the sides of the pedistal/base.  He felt this flexing was causing a slight misalignment of the chain and sprocket causing premature wear.  He said before he performed this modification he was only getting 15,000 miles from a chain set.  After the modification he never experience another failure well beyond 15k miles.
I don't remember exactly what he modified but I believe he replace the gasket directly under the pedistal/base with a steel shim (same thickness of the gasket).  This shim still wouldn't support the edges of the pedistal/base but it would not flex under load like a cork gasket would thus preventing slight misalignment. 

Have you heard anything about this?  Or is this a non-issue?
 

[jayb]

I've never heard of that issue, and I've never had a chain actually wear out, although I have had a couple break.  One thing is that the gasket under the backing plate is not cork, they are just paper gaskets so they don't have a lot of flex to them.  In any case, I don't see any reason why you couldn't cut a piece of sheet metal to the same dimensions as that gasket, RTV it on both sides and use that instead of the paper gasket.  Couldn't hurt...