01 SIlverado Knocking

2001 CHEVROLET SILVERADO
175,000 MILES • 6 CYL • 2WD • AUTOMATIC
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MP9661
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  • 1 POST
01 SIlverado make a knocking noise when first started in the morning for 30 to 45 seconds, like there is no oil. Has oil and oil pressure is good. Any sugestions
Dec 16, 2010 at 10:37 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Sounds like a lifter leakdown problem when the lifters are gone the camshaft follows or you can mike it out to check- their brothers same goes with the cap and rotor on the ignition system
Dec 16, 2010 at 11:02 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
this is probably the piston slap that as soon as you start the engine. it gets warms agd goes away. a lifter noise will last for about a minute then go away. These models had apiston slap problem. it is nothing to worry about.
Dec 16, 2010 at 11:05 AM
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