CYLINDER BLOCK — Inspection (Cont'd) / Cylinder Block Distortion / Piston-to-Bore Clearance
EM-48prose procedureInspection (Cont'd)
Cylinder block distortion and wear
- 1Clean upper face of cylinder block. Cover the oil hole to cylinder head with a shop towel before removing all traces of cylinder head gasket. This will prevent blockage of the oil hole.
NEM001 - 2Measure the distortion of the upper face of cylinder block. Limit: 0.10 mm (0.0039 in).
UEM085 - 3If out of specification, resurface it. The resurfacing limit is determined by cylinder head resurfacing in engine. Amount of cylinder head resurfacing is "A". Amount of cylinder block resurfacing is "B". The maximum limit is as follows: A + B = 0.2 mm (0.008 in). Nominal cylinder block height from crankshaft center: 188.95 - 189.05 mm (7.4390 - 7.4429 in).
- 4If necessary, replace cylinder block.
| Specification | Value |
|---|---|
| Cylinder block upper face distortion — LimitLimit | 0.10 (0.0039)mm (in) |
| Combined resurfacing limit (A + B)Cylinder head + cylinder block | 0.2 (0.008)mm (in) |
| Nominal cylinder block height from crankshaft centerNominal | 188.95 - 189.05 (7.4390 - 7.4429)mm (in) |
Cylinder block upper face distortion — LimitLimit
0.10 (0.0039)mm (in)
Combined resurfacing limit (A + B)Cylinder head + cylinder block
0.2 (0.008)mm (in)
Nominal cylinder block height from crankshaft centerNominal
188.95 - 189.05 (7.4390 - 7.4429)mm (in)
Piston-to-bore clearance
- 1Using a bore gauge, measure cylinder bore for wear, out-of-round and taper. Standard inner diameter: 71.0 - 71.03 mm (2.7953 - 2.7965 in). Wear limit: 0.2 mm (0.008 in). Out-of-round (X−Y) limit: 0.015 mm (0.0006 in). Taper (A−B) limit: 0.010 mm (0.0004 in). If it exceeds the limit, rebore all cylinders. Replace cylinder block if necessary.
SEM166D - 2Check for scratches and seizure. If seizure is found, hone it.
IMPORTANT
If both cylinder block and piston are replaced with new ones, select piston of the same grade number punched on cylinder block lower surface.
| Specification | Value |
|---|---|
| Cylinder bore standard inner diameterStandard | 71.0 - 71.03 (2.7953 - 2.7965)mm (in) |
| Cylinder bore wear limitLimit | 0.2 (0.008)mm (in) |
| Cylinder bore out-of-round limit (X−Y)Limit | 0.015 (0.0006)mm (in) |
| Cylinder bore taper limit (A−B)Limit | 0.010 (0.0004)mm (in) |
Cylinder bore standard inner diameterStandard
71.0 - 71.03 (2.7953 - 2.7965)mm (in)
Cylinder bore wear limitLimit
0.2 (0.008)mm (in)
Cylinder bore out-of-round limit (X−Y)Limit
0.015 (0.0006)mm (in)
Cylinder bore taper limit (A−B)Limit
0.010 (0.0004)mm (in)