LT engine build questions
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Teching In
Joined: Jan 2025
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LT engine build questions Hello.
I am new here. I found this forum searching for answers. My 2018 Chevy Silverado 1500 5.3 LT L83 engine had a failed AFM lifter.and destroyed my cam . I decided to do a full rebuild to refresh the engine. This is my first LS/LT build but I have built numerous vintage engines.
I have a couple questions. I hope someone can help Please.
1. I am trying to sort out the direction the dimple on the crank rods align. Do the dimples all align facing backwards towards the rear of the engine, or going forwards towards the front of the engine. I know the pistons go on the Left Bank or driver side and the right Bank passenger side based on the L& R stamp on piston. But I can not connect them to the crank rod until I know which way that dimples face.
2. Second I got all new GM rings for the pistons and I have a question the dark top ring has a little white o on one side, is that mark to say that is the top?
3. Finally on the mains the inner and outer. The service manual says tighten 15 ft pounds and then do 110 degrees on the inner and 80 something on the outer following the sequence but from what I heard from another source of i reuse the bolts I can do 50 ft. lbs on both inner and outer in sequence is this true? The reason it is since they're already been stretched you can't set it back to what the service manual says unless they're new.
Thank you if you read
and a big thank you for a reply
I am new here. I found this forum searching for answers. My 2018 Chevy Silverado 1500 5.3 LT L83 engine had a failed AFM lifter.and destroyed my cam . I decided to do a full rebuild to refresh the engine. This is my first LS/LT build but I have built numerous vintage engines.
I have a couple questions. I hope someone can help Please.
1. I am trying to sort out the direction the dimple on the crank rods align. Do the dimples all align facing backwards towards the rear of the engine, or going forwards towards the front of the engine. I know the pistons go on the Left Bank or driver side and the right Bank passenger side based on the L& R stamp on piston. But I can not connect them to the crank rod until I know which way that dimples face.
2. Second I got all new GM rings for the pistons and I have a question the dark top ring has a little white o on one side, is that mark to say that is the top?
3. Finally on the mains the inner and outer. The service manual says tighten 15 ft pounds and then do 110 degrees on the inner and 80 something on the outer following the sequence but from what I heard from another source of i reuse the bolts I can do 50 ft. lbs on both inner and outer in sequence is this true? The reason it is since they're already been stretched you can't set it back to what the service manual says unless they're new.
Thank you if you read
and a big thank you for a reply
