1993 Chevrolet Silverado engine knock

1993 CHEVROLET SILVERADO
157,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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FLHTC03
  • MEMBER
  • 2 POSTS
When starting the engine, when it's cold, a subtle knock can be heard but stops in 30-60 seconds and is not heard when the engine is warm. A friend with the same truck has heard the same knock for several years and has no significant problems. What could cause this and is there a simple and inexpensive fix?
Feb 14, 2014 at 12:16 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
someo f those years had that problem it's an oil pressure thing and it doesn't really hurt it although it may seem to think that it will. If you use a filter with a check valve helps it but not a lot. I don't remember the filter number that was used to kind of fix it but just use a filter like napa, wix Purolator, bosch mainly.
Feb 14, 2014 at 1:40 AM
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FLHTC03
  • MEMBER
  • 2 POSTS
Thank You! Another source told me it probably is play in the lifters from wear and shouldn't be a problem as long as oil pressure is good and that is the case with this truck. I don't know if it will make a difference but I will use Amsoil and an Amsoil filter after the next oil change. Thanks again for your help.
Feb 14, 2014 at 5:06 AM
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