91 Silverado, 350, Short bed.
Early this spring the side of my radiator blew out and I replaced it (same #
of core radiator), the t-stat, cap and hoses. since then the thing takes a
little longer to heat up (to about 195). But, once the t-stat opens up, the
gauge drops to about 160 in a couple seconds and then run steady there. If
I idle for a while (a few minutes) it warms a little (maybe 170), but as
soon as I drive, it falls back to 160.
I burped the thing really well. I was on about a 40 degree slope and let
her run for almost an hour with the cap off. There was never a time that I
stuck my finger in the coolant and wasn't anything more than luke warm... I
also had the cooling system flushed at a shop, twice.
Now that the weather is turning colder, it is becoming more a nuisance. I
have changed the t-stat 3 times (Napa, AutoZone and Advance) with no change.
I am thinking that maybe my water pump is on the way out. My humble theory
is along the line that it is not broken, but maybe only pumping say 50% of
the coolant it should. This means the water is in the radiator twice as
long as normal and gets cooled off more. And as I recall, there was no
tremendous flow in the rad even though it did suck the water down during the
And so, I ask the free flowing fountain of knowledge in the group to flow
forth and flood this dry post with the liquid of insight. Thanks.
"Experience is what you get when you don't get what you want."