Having problems with your 2005 Pontiac Sunfire ?
Crankshaft make noise - 2005 Pontiac Sunfire
Check for failing harmonic balancer (rubber failing between hub and pulley). If auto drop the inspection plate and check flex plate for cracks and loose bolts.. If it is a .knock remove plug leads one at a time and find when the noise is less and that will be the big end or main failing.
Repair Help & Product Troubleshooting for 2005 Pontiac Sunfire
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