how far can you bore the 4.8 block?
looks like the bores are thick and the block is cast iron so it can be bored not
needing sleaves. how thick are those cylinder walls?
Not sure on how thick the cylinder walls are but you can go up to .040 in diameter over and be safe. Try not to go over .030 over.
If it is a thin wall casting going too large on the bore will result in overheating problems. This was a problem way back when on Ford small blocks. A good machine shop should be able to tell you how far is safe.
Wow, according to the link an iron block 4.8 can go .130" That is huge! Read about it at the link....http://www.hotrod.com/how- to/engine/1412-max-overbore-for-ls-blocks/
Looking for a Used Silverado 1500 in your area?
CarGurus has 149,178 nationwide Silverado 1500 listings starting at $1,500.
Search Chevrolet Silverado 1500 Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Chevrolet Silverado 1500 Experts