Cylinder Block - Inspection (Cont'd)

EM-148prose procedure

Pin journal out-of-round/taper limit differs between SR20DE and SR20DET.

Inspection (Cont'd)

8
Cut cylinder bores.
When any cylinder needs boring, all other cylinders must also be bored.
Do not cut too much out of cylinder bore at a time. Cut only 0.05 mm (0.0020 in) or so in diameter at a time.
9
Hone cylinders to obtain specified piston-to-bore clearance.
10
Measure finished cylinder bore for out-of-round and taper.
Measurement should be done after cylinder bore cools down.

1
Check crankshaft main and pin journals for score, wear or cracks.
2
With a micrometer, measure journals for taper and out-of-round.
SEM316A
3
Measure crankshaft runout.
Runout (Total indicator reading): Less than 0.05 mm (0.0020 in)
SEM434

Journal	SR20DE	SR20DET
Main journal	Less than 0.005 (0.0002)	Less than 0.005 (0.0002)
Pin journal	Less than 0.005 (0.0002)	Less than 0.0025 (0.0001)

Main journal

SR20DELess than 0.005 (0.0002)

SR20DETLess than 0.005 (0.0002)

Pin journal

SR20DELess than 0.005 (0.0002)

SR20DETLess than 0.0025 (0.0001)

Either of the following two methods may be used, however, method "A" gives more reliable results and is preferable.

Main bearing

1
Set main bearings in their proper positions on cylinder block and main bearing cap.
SEM685D
2
Install main bearing cap and main bearing beam to cylinder block.
Tighten all bolts in correct order in two or three stages.
SEM100D
3
Measure inner diameter "A" of each main bearing.