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PISTON DATA
PISTON DATA
Pistons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard piston diameter, measured at 57 mm from skirt base
and perpendicularly to the gudgeon pin axis . . . . . . . . . . . . . . . . . .
Piston clearance in cylinder liner . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum permitted wear clearance . . . . . . . . . . . . . . . . . . . . . . . . .
Piston oversizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Piston protrusion at TDC from cylinder block face . . . . . . . . . . . . .
Gudgeon pin diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diameter of gudgeon pin seat in piston . . . . . . . . . . . . . . . . . . . . . .
Gudgeon pin to seat clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gudgeon pin to small end bearing clearance . . . . . . . . . . . . . . . . .
Maximum permitted wear clearance . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum weight difference between pistons in same engine . . .
Piston ring groove clearance (measured vertically): . . . . . . . . . . . .
-- 1° ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-- 2° ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-- 3° ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum permitted wear clearance:
-- 1° ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-- 2° and 3° ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly clearance between piston ring ends in cylinder
sleeves:
-- 1° ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-- 2° ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-- 3° ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum permissible gap (wear limit) . . . . . . . . . . . . . . . . . . . . . . .
SECTION 10 - - ENGINE - - CHAPTER 1
inches (mm)
Bore 100
light alloy with three compression rings,
including two seal rings and one
including two seal rings and one
scraper ring
3.9301 to 3.9307
4.0870 to 4.0876
(99.827 to 99.841)
0.006 to 0.01
0.0068 to 0.008
(0.159 to 0.197)
(0.174 to 0.212)
0.01 (0.30)
0.01 -- 0.03 (0.4 -- 0.8)
0.01 to 0.03 (0.355 to 0.761)
1.4953 to 1.4956 (37.983 to 37.990)
1.4957 to 1.4960 (37.993 to 38.000)
0.0001 to 0.0006 (0.003 to 0.017)
0.0005 to 0.0012 (0.014 to 0.031)
0.002 (0.06)
20 grams
0.003 to 0.004 (0.090 to 0.122)
0.0023 to 0.0036 (0.060 to 0.092)
0.0017 to 0.0029 (0.040 to 0.075)
0.02 (0.50)
0.008 (0.20)
0.0137 to 0.0216
0.0157 to 0.0255
(0.35 to 0.55)
0.0118 to 0.0177
0.0118 to 0.0216
(0.30 to 0.45)
0.0118 to 0.0236 (0.30 to 0.60)
0.0472 (1.20)
17
Bore 104
(103.812 to
103.826)
(0.40 to 0.65)
(0.30 to 0.55)
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