LEMON Manuals: Even more car manuals for everyone
Home >> Pontiac >> 1983 >> 2000 Sunbird Automatic >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 1.8L 4-CYL OHC - VIN [G] >> Overhaul >> Main Bearing Service

Main Bearing Service

  1. With engine in vehicle, support crankshaft to remove clearance from upper bearing. Using plastigage, measure clearance between lower bearing and journal.
  2. Place plastigage across full width of journal, parallel to crankshaft. Install bearing cap and tighten bolts. Do not rotate crankshaft.
  3. Remove bearing cap and measure plastigage at widest point. Replace bearings if clearance is inaccurate. Always replace bearings in sets. Replacement bearings are available in standard .010" (.25 mm) and .020" (.50 mm) undersize.
  4. Coat all bearing surfaces with oil and install bearings. Install main bearing caps so that bottom of number 1 (cast on surface of main cap) faces rear of engine. Install main cap bolts and fill rear main cap side grooves with sealing compound.
  5. Hand tighten all main cap bolts. Tap rear end of crankshaft with a plastic hammer. Tighten main cap bolts. Force crankshaft toward front of engine and check end play. If end play is excessive, thrust bearing must be replaced.
scientia non olet · About LEMON Manuals