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4 cyl

SD25

2488 cc

BORE

STROKE

FIRING

MAIN

ROD

ORDER

JOURNAL

JOURNAL

3.5040

3.9370

1-3-4-2

2.7921

2.0837

SPARK PLUG

SPARK PLUG

DISTRIBUTOR

IGN.TIMING

OIL CAPACITY

TYPE

GAP

GAP

IDLE SPEED

WITH FILTER

6.87 U.S.qts.

TORQUE VALUES

LOCATION

FT. LB.

LOCATION

FT. LB.

Main brg.caps

108-116

Oil pan drain plug

Rod brg. caps

38-41

Oil pump bolt

Cyl. head bolts

Sub(36) Main(94)

Rocker arm nut

Cam sprocket bolt

33-36

Rckr.shaft brckt.bolt

14-18

Crank pulley bolt

217-239

Side cover bolt

Flywheel bolt

33-36

Spark plug

Flywheel housing

Water outlet bolt

7-9

Manifold bolt & nut

11-13

Water pump bolt

8mm(8) 10mm(18)

Oil pan bolt

2.9-4.3

Wtr.pmp.pulley bolt

PISTON

Diameter

3.4998-3.5014

Sleeve clearance

.0035-.0045

Pin diameter

1.0233-1.0236

RINGS

Ring gap-Top

.0118-.0197

Side clearance Top

.0024-.0039

Ring gap-2nd

.0079-.0138

Side clearance 2nd

.0016-.0031

Ring gap-Oil

.0059-.0118

Side clearance Oil

.0008-.0024

CRANKSHAFT

Main journal dia.

2.7916-2.7921

Rod journal dia.

2.0832-2.0837

Main run clearance

.0014-.0037

Rod run clearance

.0014-.0035

End play

.0024-.0055

CAMSHAFT

Front journal dia.

1.7887-1.7892

End play

.0032-.0102

Center journal dia.

1.7282-1.7287

Rear journal dia.

1.6228-1.6233

VALVES

Intake length

4.61

Exhaust length

4.61

Intake stem dia.

.3138-.3144

Exhaust stem dia.

.3128-.3134

Intake head dia.

1.571-1.579

Exhaust head dia.

1.335-1.343

Intake face angle

45 deg. 30 sec.

Exhaust face angle

45 deg. 30 sec.

Intake clearance

.014 hot

Exhaust clearance

.014 hot