Figure 6-14. Points of measurement for checking crankcase.

(2) To detect dimensional changes caused by

(d)

From

cylinder

mounting

deck

welding repair, precisely measure crankcase at

crankshaft bearing support bore centerline using

several key positions depending upon the

a suitable plug or bore in the crankcase bearing

location of the repair. For repair to side walls,

bore (A). This measurement shall be within

measure

the

positions

outlined

steps

(a)

8 . 3 7 7 - 8 . 3 6 9 inch.

through

(d).

(e) Oil pan rail shall be flat within 0.010-

inch when all four corners are on the same plane.

(a) Across the main bearing cap support

web machined surfaces (B, fig. 6-14).

(3) For repair in other locations, measure in

(b) Across the inside of the crankcase at

the appropriate locations to insure that critical

the junction of the side wall and the oil pan rail

dimensions

are

held.

Record

dimensions

for

(D).

future use.

cap support face (C).

Figure 6-14. Points of measurement for checking crankcase.

6-20