Picked up a 7.4 Gen 6. The pistons have the following markings inside: GM, 1255 5797, 8224. Question is are they std size pistons ??? (I assume they are....want to verify)
I did a google on the part number....nothing.
Thanks,
Rick
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Picked up a 7.4 Gen 6. The pistons have the following markings inside: GM, 1255 5797, 8224. Question is are they std size pistons ??? (I assume they are....want to verify)
I did a google on the part number....nothing.
Thanks,
Rick
Measure the skirt diameter opposite the pin bore with a 4" to 5" micrometer or 6" caliper. Standard would be 4.250". +0.030" would be 4.280".
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besides measuring-oversize pistons are usually stamped on the tops