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Low oil pressure

Tiny
SFWILL
  • MEMBER
  • 1990 CHEVROLET TRUCK
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 5,000 MILES
I have a 1990 Chevy Silverado with a 4.3L 262ci Chevy V6 that has been rebuilt. I am running 10w 40 castrol regular oil throug it and it run and sounds fine when it is cold but at temp when idleing it will drop to 0 and I can hear a knocking. I was wondering if I should put a thicker oil in it like straight 60 weight racing oil or 30 weight.
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Sunday, December 12th, 2010 AT 11:53 PM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If it has only 5000 miles on it it should still be under warranty. This can be anything like a bad oil filter, bearings loose.
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Friday, December 17th, 2010 AT 11:55 PM
Tiny
DANNY JOHNSTON
  • MEMBER
  • 1 POST
Just the opposite, change to 5w-30w, 10w-30w or just Castrol 30w
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Monday, June 3rd, 2019 AT 6:59 PM

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