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A constant engine knock can be diagnosed as several minor/major issues.
Minor :
low oil
Serpentine belt (chunk missing from it)
Belt tensioner
Stuck lifter
Major:
Main bearing failure
Bent or broken Valve
Piston wrist pin
Distributer out of spec.
If you do not feel comfortable tackling such an issue. It would be a good idea to let an experienced mechanic listen to your engine. Most that call themselves mechanics will be able to pin it just by ear.. Hope this helps you.
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∙ 14y ago
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