honing for hepolite (federal mogul) rings

ewgoforth · Mar 30, 2015

Hi,

I have some new .020 Emgo pistons and hepolite rings to install in my 1973 850. What hone should I tell the machine shop to use? Inside the packaging it says Federal Mogul, so I believe they're the true manufacturer. The clearance I was planning to use was. .045.

Eric

mschmitz57 · Mar 30, 2015

I used a Flex Hone (ball hone) on my 850 a couple years ago. I think it's a medium-fine grit.
Surely your machine shop must have lots of these hanging around.
Don't forget to check the ring gap.

comnoz · Mar 30, 2015

ewgoforth said:
Hi,

I have some new .020 Emgo pistons and hepolite rings to install in my 1973 850. What hone should I tell the machine shop to use? Inside the packaging it says Federal Mogul, so I believe they're the true manufacturer. The clearance I was planning to use was. .045.

Eric

An AN300 stone will do nicely. Jim

Brooking 850 · Mar 30, 2015

Do you mean 0.0045" or 0.045" ?
Regards Mike

pete.v · Mar 30, 2015

Hepolite ring in Emgo pistons? Make sure they sit all the way in there. Some piston grooves are shallower than others. I would suggest Hepolite Pistons to go with those Hepolite rings.

And yes, I'm sure you meant .0045

Beach · Mar 31, 2015

I believe the correct clearance is .0045"......

ewgoforth · Mar 31, 2015

Brooking 850 said:
Do you mean 0.0045" or 0.045" ?
Regards Mike

Doh, .0045"

honing for hepolite (federal mogul) rings

ewgoforth

mschmitz57

comnoz

Brooking 850

pete.v

Beach

ewgoforth

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