Oil pump sprocket--is it supposed to look "blued"?

[Cheburashka]

Still looking for that ticking sound. I took the side cases off and the primary and starter chains are OK. the primary chain has some stretch to it, but nothing that would account for the noise I'm hearing. The only thing that looked odd was that the oil pump gear had a bluish tint to it from the teeth down to the circular holes. I'm not sure if it was heat treated at the factory, or if it overheated while the engine was running. The pump itself is in very good condition.

[MRiesAP]

Mine is removed now. Doesn't look "blued". Yours looks like it got hot. kinda looks like stuff we pull out of overheated aircraft engines.

Untitled by mriesap, on Flickr

[LOUD MOUSE]

Was it installed with 2 gaskets and a metal screen?. ........lm

Still looking for that ticking sound. I took the side cases off and the primary and starter chains are OK. the primary chain has some stretch to it, but nothing that would account for the noise I'm hearing. The only thing that looked odd was that the oil pump gear had a bluish tint to it from the teeth down to the circular holes. I'm not sure if it was heat treated at the factory, or if it overheated while the engine was running. The pump itself is in very good condition.

[jensey]

Hi,

I have several NOS ones, also blue. It's the hardening process that Honda used for these oil pump gears that gives this color.

Jensen

[Cheburashka]

Was it installed with 2 gaskets and a metal screen?. ........lm


Yes, it has two gaskets and a screen.

[LOUD MOUSE]

Like Jensen says it is made that way.
If any of the gaskets had been missing the gears could wear but I think you need to look farther. ......lm

Was it installed with 2 gaskets and a metal screen?. ........lm


Yes, it has two gaskets and a screen.

[Cheburashka]

Well, I guess that's good news. Good news like: nothing that's easily removed from the engine could be causing the noise, so I'll have to get into the top end and maybe even deeper than that.