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Oil pressure gauge high 1987 chevrolet blazer 350 5.7 liter

Yesterday flushed the radiator and refilled new coolant. Later that evening drove to store and noticed oil gauge was maxed/high. Pulled over and reved the engine and it dropped to normal then maxed/high again. Did a tune up last month; new cap, rotor, plugs, wire, PCV valve, etc. Any suggestions?

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  • 16 Answers

YOur best bet on a truck that old is to install a mechanical oil pressure gauge. They are available at any auto parts store or even Target or Walmart. Just buy the kit and follow the instructions. Mounting and routing the oil line is the hardest part.
It would be very unusual for the oil pressure to be maxed high in a 350 that is over 20 years old so i have to think the issue is the guage.

Posted on Feb 10, 2012

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ZJLimited
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SOURCE: 1999 chevrolet blazer firing order

1999 Chevrolet S10/T10 Blazer 4.3 liter V-6 VIN "W"

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Hope this helps to solve it; remember to rate this answer. Good luck.

Posted on Apr 27, 2011

Nemesis5791
  • 133 Answers

SOURCE: a diagram of the flushing of a radiator and block

Theres no such thing as a diagram, here are the draining instructions, hope this helps...

  • 1-Place a large drain pan beneath the radiator drain plug. The drain plug is located on the passenger side at the very bottom of the radiator on the engine side.

  • 2-Make sure the engine is cool. Open the hood of the truck and remove the radiator cap.
  • 3-Loosen the drain plug. On the 2000 Blazer, the drain plug is a wing-nut type of plug. Twist it with your fingers until the coolant begins to drain.

  • *To flush the block, once you have drained the radiator, run the engine for a bit untill the temp gauge goes up to normal, then the coolant will have been evacuated from the block. DO NOT leave the engine on, once it reaches normal temp, (this will happen quick) turn off right away, otherwise you'll be forking out a few hundred $$$ to fix the worped heads.
    4-Tighten the drain plug with your fingers once the coolant has drained fully from the radiator. Remove the drain pan and dispose of the used coolant properly.
    Some service stations will take and recycle your used coolant.
    Hope this helps...



  • Read more: How to Drain a Radiator From a 2000 Chevy Blazer ' eHow.com http://www.ehow.com/how_6357264_drain-radiator-2000-chevy-blazer.html#ixzz1VS4RBufX

    Posted on Aug 19, 2011

    • 334 Answers

    SOURCE: i need a vacuum diagram

    Hello buggyboo1219,

    Below is a diagram of the engine vacuum hoses.

    netvan_186.png

    I hope this helps.

    Regards,

    Jerry

    Posted on Aug 20, 2011

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  • 1-Place a large drain pan beneath the radiator drain plug. The drain plug is located on the passenger side at the very bottom of the radiator on the engine side.

  • 2-Make sure the engine is cool. Open the hood of the truck and remove the radiator cap.
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