Dumb Question Thread - No Flaming Allowed

[bmwfnatic]

If they have that green O-ring, that means they'd need to be replaced, yeah?

Officially yes, but if you put it on recently and not years ago I think they will survive reusing once for sure.

[bmwfnatic]

Any ideas on what to use to remove residue from cylinder walls?

"Carbon X Combustion Chamber Cleaner K1+K2" is a product that cleans carbon deposits insanely well.
It's a 2 part formula, one is the cleaner, which is like a thick shaving foam, and the other part is the neutralizer, which makes the foam turn liquid on contact.

The stuff is strong enough to clean without any abresives, I wouldn't put scotchbrite anywhere near my cylinder walls, it is effectively still sandpaper.

Just be cautious you can do more harm than good cleaning the combustion chamber and the top of the pistons if that means a bunch of gunk goes into the ringland area.
Painters tape is your friend...

[CrisSilberGrau]

I have a set of Schrick 280/272 with damaged lobes on exhaust cyl 3 and 6, 6 being the worst. The eroded lobes in question have minimal material shaved. It does catch the nail on 6. I guess I'm asking if they can be salvaged, is there a service where this can be done if anyone knows? These cams were silly money in Canadian slave dollars to my door and just trying to get something back from them.

[Tbonem3]

Maybe it depends on how deep as you don't want to diminish the lift and/or duration. What's been done before is weld on more material, then grind it down back to original shape.

[CrisSilberGrau]

Maybe it depends on how deep as you don't want to diminish the lift and/or duration. What's been done before is weld on more material, then grind it down back to original shape.

At most there's maybe a mm missing from c6 love. Not sure how to accurately measure and portray this as the material eroded is over the circumference of the lobe where it applies contact to th rocker.