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Use Undersize Bearing Usage Guide Nissan Sentra B16

Engine Mechanical (MR20DE) 2 illustrations ~195 words

Use Undersize Bearing Usage Guide

  1. When the specified main bearing oil clearance is not obtained with standard size main bearings, use undersize (US) bearing.
  2. When using undersize (US) bearing, measure the main bearing inner diameter with bearing installed, and grind main journal so that the main bearing oil clearance satisfies the standard.
CAUTIONIn grinding crankshaft main journal to use undersize bearings, keep the fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)] (A).
Unit: mm (in)
SizeThickness
US 0.25 (0.0098)2.126 - 2.134 (0.0837 - 0.0840)

BEARING UNDERSIZE TABLE

Scheme 175

Scheme 175: CRANKSHAFT END PLAY
Scheme 175: CRANKSHAFT END PLAY
  1. Measure the clearance between thrust bearings and crankshaft arm when crankshaft is moved fully forward or backward with a dial indicator (A). Standard: 0.10 - 0.26 mm (0.0039 - 0.0102 in) Limit: 0.30 mm (0.012 in)
  2. If the measured value exceeds the limit, replace thrust bearings, and measure again. If it still exceeds the limit, replace crankshaft also. (Scheme 174): Measuring Clearance Between Thrust Bearings And Crankshaft Arm

Scheme 176

Scheme 176: CONNECTING ROD SIDE CLEARANCE
Scheme 176: CONNECTING ROD SIDE CLEARANCE
  1. Measure the side clearance between connecting rod and crankshaft arm with a feeler gauge (A). Standard: 0.20 - 0.35 mm (0.0079 - 0.0138 in) Limit: 0.40 mm (0.0157 in)
  2. If the measured value exceeds the limit, replace connecting rod, and measure again. If it still exceeds the limit, replace crankshaft also. see scheme 190: Measuring Side Clearance Between Connecting Rod And Crankshaft Arm