installing pistons rings

SDE · Mar 10, 2012

I would like to install the pistons today in my F-20. I don't remember the proper sequence for the rings. Oil wiper on the bottom, right? And each ring turned 90 degrees to the one above or is it 0,180,270 and then 90?
Thank you
Steve

teddy52food · Mar 10, 2012

It is not that fussy as long as they don't all line up. They turn as it is running anyway.

rustred · Mar 10, 2012

yes oil ring on btm. as this ring is usually wider than the compression rings. there is other checks to do also. need to check ring end gap. need .003-.004 for every inch of cyl. bore. do this at very top or at btm of sleeve where no wear occures. talking used sleeves. the rings are also marked top or a dot which goes towards top of piston. rings that are the same without markings it dont matter. i like to have the spacings staggerd on the wristpin side , so they are not on the thrust sides espessially the major thrust side. some rings come with instuctions with them. also if you have excessive side clearance on the top ring the piston groove is worn. these old engines are forgiving and only run about 1100rpm so you can get away with larger clearances in places.

Janicholson · Mar 10, 2012

The oil ring needs to have its Rails at opposing sides. The others should be spaced at least 45* apart. make sure the ring grooves are clean to metal. (used pistons) Dip the piston in engine oil just before insertion. Jim

SDE · Mar 11, 2012

I got the rings and pistons installed yesterday. I even set the head on the block. I now have to dig thru the shelfs of spare parts to find whatever it is that goes on top of the head on the opposite side of the push rods. Those studs have to be extra long for something else to attach to them.
Thank you
Steve

installing pistons rings

SDE

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teddy52food

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rustred

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Janicholson

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SDE

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