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GerhardH · 10-06-2020, 02:11 PM

Some piston measurements.

Piston 3796494 (GM 3816974)
They are 62-8 Chev. H.D. Truck, low compression, recessed head .085 x 3.125, 8.0:1 compression.
They have a steel insert cast into the top ring groove (armored groove) These pistons are a cast piston.

Piston Rings changed against Sealed Power Performance Ring Set E-251K: 5/64 x 5/64 x 3/16 (in.) groove widths. Steel top ring. Grey iron with phosphate coating 2nd ring. The top ring is a plain ring. Unlike Hastings and others. No markings. Installs either side up. Second ring has a dot on top side.

10-06-2020, 02:11 PM	#160
GerhardH Registered User Join Date: Aug 2017 Location: South Germany Posts: 527	Re: My 1968 C-20 Golden Anniversary Project Some piston measurements. Piston 3796494 (GM 3816974) They are 62-8 Chev. H.D. Truck, low compression, recessed head .085 x 3.125, 8.0:1 compression. They have a steel insert cast into the top ring groove (armored groove) These pistons are a cast piston. Piston Rings changed against Sealed Power Performance Ring Set E-251K: 5/64 x 5/64 x 3/16 (in.) groove widths. Steel top ring. Grey iron with phosphate coating 2nd ring. The top ring is a plain ring. Unlike Hastings and others. No markings. Installs either side up. Second ring has a dot on top side. Attached Images __________________ Best regards GerhardH! Members met: 68 short step, 68bowtie, 72c20customcamper, botmfedr1, C/10 King, Chevyland, cornerstore, dmjlambert, fun in dirt, GMan69, Ol Blue K20 1968 CHEVROLET C20 Custom Camper 50th Anniversary, Long bed (LB) 8', 327 V8, Air Condition (AC), Power Steering (PS), Power Brake (PB), Z62 Custom & Comfort Appearance, Turbo Hydramatic TH 400 http://67-72chevytrucks.com/vboard/s...d.php?t=760400 Last edited by GerhardH; 10-06-2020 at 02:17 PM.