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UNDERSIZE BEARINGS USAGE GUIDE Nissan Armada I

Engine Mechanical 3 illustrations ~197 words

UNDERSIZE BEARINGS USAGE GUIDE

  1. When the specified oil clearance is not obtained with standard size connecting rod bearings, use undersize (US) bearings.
  2. When using undersize bearing, measure the bearing inside diameter with the bearing installed, and grind the crankshaft pin so that the oil clearance satisfies the standard. Bearing undersize table
Unit: mm (in)
UndersizeThickness
0.25 (0.0098)1.627-1.635 (0.0641-0.0644)

BEARING UNDERSIZE TABLE

CAUTIONIn grinding the crankshaft pin to use undersize bearings, keep the fillet R (All crankshaft pins). Fillet R: 1.5-1.7 mm (0.059-0.067 in)

Scheme 205

Scheme 205
Scheme 205

Scheme 206

Scheme 206: WHEN NEW CYLINDER BLOCK AND CRANKSHAFT ARE USED
Scheme 206: WHEN NEW CYLINDER BLOCK AND CRANKSHAFT ARE USED

Scheme 207

Scheme 207
Scheme 207
  1. Apply the main bearing housing grade on the bottom face of the cylinder block to the row in "Main Bearings Selection Chart".
  2. Apply the journal diameter grade on the crankshaft front to the column in "Main Bearings Selection Chart".
  3. Read the symbol at the cross point of the selected row and column in the "Main Bearings Selection Chart". CAUTION: Initial clearance for No. 1, 5 journal and No. 2, 3, 4 journal is different. Use two different selection lists for each part. No. 1, 5 journal and No. 2, 3, 4 journal have the same signs but different measures. Do not confuse them.
  4. Apply the symbol to the "Main Bearings Grade Chart" to select. NOTE: Grade list applies to all journals. Service parts are available as a set of both upper and lower.