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Engine Mechanical Specifications (LFM)

1.0L (LFM)

Application Specification
Metric English
General Data
  • Engine Type
 4 Cylinder (In-Line)
  • Displacement
 995 cm3
  • Bore - Stroke
 68.5-67.5 mm 2.6969-2.6575 in
  • Compression Ratio
 10.5
  • Firing Order
 1-3-4-2
  • Engine Idle Speed
 670 RPM (A/C OFF)
800 RPM (A/C ON)
Cylinder Bore
  • Diameter
 68.51 mm 2.6972 in
  • Out of Round (Maximum)
 0.0005 mm 0.0000197 in
Piston
  • Diameter
 68.465-68.479 mm 2.6955-2.6960 in
  • Clearance to Bore
 0.023-0.053 mm 0.00091-0.00209 in
Piston Rings
Piston Ring End Gap
  • Top Ring
 0.15-0.30 mm 0.0059-0.0118 in
  • 2nd Ring
 0.30-0.45 mm 0.0118-0.0177 in
  • Oil Ring
 0.20-0.50 mm 0.0078-0.0197 in
Groove Clearance
  • Top Ring
 0.03-0.07 mm 0.0118-0.00276 in
  • 2nd Ring
 0.03-0.07 mm 0.0118-0.00276 in
  • Oil Ring
 0.04-0.12 mm 0.00157-0.00472 in
Piston Pin
  • Diameter
 17.996-18.000 mm 0.7085-0.7087 in
  • Pin Clearance to Piston Bore
 0.006 -0.014 mm 0.00024-0.00055 in
Camshaft
  • End Play
 0.08-0.26 mm 0.00314-0.01024 in
Journal OD
  • No. 1
 31.934-31.95 mm 1.2572-1.2579 in
  • No. 2
 22.939-22.96 mm 0.9031-0.9039 in
  • No. 3
 22.939-22.96 mm 0.9031-0.9039 in
  • No. 4
 22.939-22.96 mm 0.9031-0.9039 in
  • No. 5
 22.939-22.96 mm 0.9031-0.9039 in
Journal ID
  • No. 1
 32-32.021 mm 1.2598-1.2607 in
  • No. 2
 23-23.021 mm 0.9055-0.9063 in
  • No. 3
 23-23.021 mm 0.9055-0.9063 in
  • No. 4
 23-23.021 mm 0.9055-0.9063 in
  • No. 5
 23-23.021 mm 0.9055-0.9063 in
Crankshaft
Main Journal
  • Diameter (All)
 48.979-48.995 mm 1.9283-1.9289 in
  • Main Bearing Clearance (All)
 0.018-0.058 mm 0.00071-0.00228 in
  • Crankshaft End Play
 0.08-0.29 mm 0.00314-0.01142 in
Connecting Rod Journal
  • Diameter (All)
 37.979-37.995 mm 1.4952-1.4959 in
  • Rod Bearing Clearance (All)
 0.02-0.06 mm 0.00079-0.00236 in
  • End Play
 0.1-0.25 mm 0.00393-0.00984 in
Valve System
Seat Inner Diameter
  • Intake
 22-22.2 mm 0.8661-0.8740 in
  • Exhaust
 18.5-18.7 mm 0.7283-0.7362 in
  • Valve Guide Inside Diameter (All)
 5.0-5.012 mm 0.1969-0.1973 in
Valve Stem Diameter
  • Intake
 4.972 ± 0.007 mm 0.1957 ± 0.00028 in
  • Exhaust
 4.963 ± 0.007 mm 0.1954 ± 0.00028 in
Valve Length
  • Intake
 99.17 ± 0.225 mm 3.9043 ± 0.00886 in
  • Exhaust
 100.01 ± 0.225 mm 3.9374 ± 0.00886 in
Valve Spring
  • Free Length
 4.33 mm 1.7453 in
  • Valve Closed
 118 ± 4.72 N @ 34 mm 26.5264 ± 1.0611 lbs @ 1.3386 in
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