Check the ID letters stamped on the cylinder block pan rails. These letters identify the production standard piston grade size and cylinder bore. The letters…
Category: Duramax LLY
Check surface flatness of the cylinder block deck with a straightedge and feeler gauge (Figure 2-104). Deck surface flatness must not vary by more than…
Check all of the block surfaces for nicks, scratches, cracks, damaged threads, or evidence of porosity at any point. Minor nicks and scratches can be…
The block can be cleaned with standard parts cleaning equipment. However, if the crankcase and bores are heavily coated with varnish, gum, carbon, sludge, or…
1. Inspect main bearing caps. Note if caps have factory I.D. markings on them. However, if caps do not have factory marks, it will be…
1. Remove six capscrews and flywheel from crankshaft (Figure 2-97). 2. Remove flywheel attaching bolts with impact wrench and suitable size socket. 3. Work flywheel…
1. Remove ridge at top of each cylinder bore with ridge reamer J–24270. Remove shavings – chips afterward. 2. Paint mark pistons for assembly reference.…
1. Remove thrust plate and spacer (Figure 2-95). CAUTION: Support camshaft during removal to avoid damaging bearings. 2. Remove camshaft from cylinder block.
1. Remove nut from pump mounting stud (Figure 2-93). 2. Loosen bracket clamp screw and rotate bracket off mounting stud. 3. Remove pump mounting stud.…
1. Drain oil from pan if not previously done. 2. Remove pan bolts. 3. Tap pan with rubber mallet to loosen. Then remove pan. 4.…