Got my Camshafts back from repair/regrind

[rothaus]

I got my 964 camshafts back from repair and regrind. Is this normal what they look like ? I expected them all shiny like polished.






Thanks
Engelbert

[mikedsilva]

That's what they look like when I get them. Have had several sets now.

[ahh911]

I asked John D. about this. He said special coating, don't remove prior to install, but verify for yourself, quick call does it.

[stownsen914]

I got a set of cams back from Elgin that had a similar look. He called it Parkerizing. Apparently it’s for corrosion resistance and lubrication. I assume it’s sacrificial.

[rothaus]

Originally Posted by ahh911

I asked John D. about this. He said special coating, don't remove prior to install, but verify for yourself, quick call does it.

That is the answer I got.

" phosphate coating is for break in "

Thanks
Engelbert

[boyt911sc]

Originally Posted by rothaus

That is the answer I got.

" phosphate coating is for break in "

Thanks
Engelbert

Engelbert,

From the above pictures, cam 1-2-3 specially for cylinders #1 and #3 don’t look as good as the cam 4-5-6 lobe surfaces. They should even look smoother but not shinny with the protective coating.

Did you send a close up pictures to your cam rebuilder? I have used cam shafts looking much better than these one. These are not defective cams per se but won’t be happy to have them as they are.

Tony

[ahh911]

Tony,
Once the passivation layer is removed they are all good. Mine looked like that, 20k miles since and they look great.

Phil

[superninety]

I had Dema Elgin do my 964 cams. Looked exactly like that.

I just had him do a custom grind for a 3.2 build. Same look.

[rothaus]

Thanks for all the feedback !