602 Crate Engine piston ring question

[swampbuggy]

What are the thickness dimensions of the three rings as engineered by GM ? Thanks Mark H.

[leahymtsps]

What are the thickness dimensions of the three rings as engineered by GM ? Thanks Mark H.

What year 602 as there not all the same?

Tom

[swampbuggy]

Leahymtsps, sorry it took so long to respond, the pistons are in an engine that was purchased 6 months ago. Mark H.

[jred]

just went though this last week on a 350 Chevy ,,I checked pistons on UEM/Silvolite and there's about 25 different pistons for 350 Chevys lots of different ring combos the ones that were ordered were STD 139 Hastings and were wrong 5/32 5/32 3/16 found the same rings were used in this engine with the same top rings and shallow 3/16 oil rings,, but also have a couple of different metric sizes,, the only way to know for sure is to measure them and the depth of the ring lands to be sure..

[leahymtsps]

Leahymtsps, sorry it took so long to respond, the pistons are in an engine that was purchased 6 months ago. Mark H.

If it's that new, it should have a metric ring pack 1.5-1.5-3 mm

Tom

[rfoll]

I have a set of those pistons that are 2mm,1.5mm and 3mm.

[leahymtsps]

I have a set of those pistons that are 2mm,1.5mm and 3mm.

Those are for a 604 not a 602

Tom

[rebelyell]

depending date manufacture ... I've seen 602 with
1.5, 1.5, 3.0
2.0, 1.5, 4.0
5/64, 5/64, 3/16

https://staffordmotorspeedway.com/wp-co ... MANUAL.pdf

[swampbuggy]

Thanks to all of you Folks who give me input, i will see for sure when i get them in my hands. Mark H.

[dynoflo]

maybe too late to reply but when i was cheating them up i called Mahle and they had replacements. Dont remenber ring pack.

[engineguyBill]

As has been stated in previous posts, the only way to determine the ring pack used in a crate engine is to remove a piston and measure the ring grooves. Specs are often changed quite often when crate engines are designed and/or updated.