Quote:
Originally Posted by hunter4ever12
Lately my k1500 has been acting real wierd with oil pressure. When you first start it up it idles right in the middle at the half mark on the gauge and when accelerated and driving it goes up to almost the 3/4 mark. But after driving for a while say 30 min or more it drops down to the 1/4 mark at idle and when accelerated and driving it stays right below the half mark on the gauge. I'm not sure what the problem could be I'm just hoping its not my oil pump. O ya and its a 92 k1500 5 litre with 203k miles.
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when the oil is cold the pressure is ok . then as the oil gets hot it losses pressure. this is normally what happens on worn engines..I suspect the crank bearings are worn. use a higher wt oil to get a few more miles out of it. 20-50wt.
if the oil pump is bad you would always get low pressure. if with the higher wt oil the pressure increases this is engine wear is ,,,what you have..
too many miles on your oil changes ,,/// also using poor quality oil filters .