GM Service Manual Online
For 1990-2009 cars only

Heavy Knock Hot with Torque Applied for Chevrolet Venture Ext. 1997

Heavy knock hot with torque applied may be caused by one or more of the following conditions:

    • Broken crankshaft balancer or pulley hub--replace the components as necessary.
    • Loose torque converter bolts--tighten the torque converter bolts and/or replace components as necessary.
    • Drive belt(s) too tight--adjust the drive belt tension to specifications.
    • Drive belt(s) nicked--replace the drive belt(s) as necessary.
    • Exhaust system grounded--reposition the exhaust system as necessary.
    • Engine flywheel cracked--replace the engine flywheel.
    • Excessive main bearing clearance--replace the component(s) as necessary.
    • Excessive rod bearing clearance--replace the component(s) as necessary.
    • Low quality fuel--fill with the proper quality fuel. Refer to Engine Controls.