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ENGINE
3.4
ES50PL ENGINE SERVICE DATA
Valve Spring Overall length
Inner 1.575s (40.0 mm)
Limit = --.079s (--2.0 mm)
Outer 1.650s (41.9 mm)
Squareness
Inner .067-s (1.7 mm)
q
Outer .071s (1.8 mm)
Cylinder / Piston / Connecting Rod EH50PL12
Cylinder
Surface warpage limit (mating with
cylinder head)
.002s (.05 mm)
Cylinder bore Std 3.9055-3.9062s (99.20-99.22 mm)
Taper limit .002s (.05 mm)
Out of round limit .002s (.05 mm)
Piston clearance
Std .0018-.0025s (.046-.065 mm)
Limit .0039s (.10 mm)
Piston
Outer diameter Std 3.9037-3.904s (99.155-99.170 mm)
Piston Pin Bore Standard I.D. .9055-.9057s (23.001-23.007 mm)
Piston Pin
Outer diameter .9053-.9055s (22.996-23.0 mm)
Piston pin to pin bore clearance .0002-.0004s (.001-.0011 mm)
Degree of fit Piston pin must be a push (by hand) fit at
68q F(20q C)
Piston Ring to ring groove clearance To p
Std .0012-.0028s (.030-.070 mm)
g
g
g
p
ring
Limit .0059s (.15 mm)
Second
Std .0012-.0028s (.030-.070 mm)
ring
Limit .0059s (.15 mm)
Piston Ring installed gap To p
Std .008-.012s (.20-.30 mm)
g
g
p
p
ring
Limit .027s (.7 mm)
Second
Std .014-.019s (.35-.50 mm)
ring
Limit .031s (.8 mm)
Oil ring
Std .004-.019s (.10-.50 mm)
g
Limit .039s (1.0 mm)
Connecting
Connecting rod small end ID .9058-.9063s (23.007-23.020 mm)
g
Rod
Connecting rod small end
Std .0003-.0009s (.007-.024 mm)
g
radial clearance
Limit .0020s (.05 mm)
Connecting rod big end side
Std .0035-.0196s (.09-.50 mm)
g
g
clearance
Limit .0255s (.65 mm)
Connecting rod big end
Std .0004-.0015s (.011-.038 mm)
g
g
radial clearance
Limit Same as standard
Crankshaft Crankshaft runout limit .0024s (.06 mm)
KEY - Std: Standard; OS: Oversize; ID: Inner Diameter; OD: Outer Diameter; Mag: Magneto Side; PTO: Power
Take Off Side
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