6A1 – 90 4JB1/4JB1T/4JB1TC/4JG2 - ENGINE
INSTALLATION
14. Crankshaft and Main Bearings
• The crankshaft upper bearings have an oil hole and an
oil groove. The lower bearings do not…
• Install main bearings in the cylinder body and main
bearing cap respectively.
• Apply new engine oil to upper and lower main
bearings.
• Make sure that main bearing are in correct position.
• Carefully wipe any foreign material from the upper
bearing.
• Install the main bearings to the cylinder body and the
main bearing caps.
NOTE:
Do not apply engine oil to the bearing back faces and
the cylinder body bearing fitting surfaces.
• Be sure that they are positioned correctly.
• Apply new engine oil to the upper and lower main
bearing faces.
• Carefully mount the crankshaft.
• Apply engine oil to the thrust washer.
• Install thrust washer on No.3 journal.
Oil grooves in thrust washer must face the crankshaft.
• Apply the recommended liquid gasket or its equivalent
to the No.5 crankshaft bearing cap cylinder body fitting
surfaces at points and shown in the illustration.
NOTE:
Be sure that the bearing cap fitting surface is
completely free of oil before applying the liquid
gasket.
Do not allow the liquid gasket to obstruct the cylinder
thread holes and bearings.
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