Posted by dhermesc on April 25, 2018 at 15:09:14 from (24.248.193.103):
I just bought a 2002 Chevy 1500 with a 5.3 engine (about 95K on the clock). The previous owner said that the "low coolant" light had been on the entire time they owned the vehicle(2 years) - but the coolant wasn't low. The day before I test drove the vehicle the expansion tank (reserve tank) had been replaced - he said they couldn't replace just the sensor - it was part of the tank. I test drove and bought the truck. About an hour of driving it the "low coolant light" came on. Parked and checked and it was below the half mark (full when cold line) about an inch or two. Very carefully removed the cap and the expansion tank backfilled to the "full" line when the pressure was relieved. I went ahead poured a little less than a quart of coolant into the expansion tank (overfilling it some) and drove it 6 more hours without issue.
Most people say the tank gets fuller under pressure - this one appeared to lower the coolant level an inch or so. It was as if the hot air pushed the coolant out into the rubber hoses and engine. Would soft (original?) water hoses account for this?
I did some more checking and everyone appears to agree a loss of coolant indicates a failing water pump - even if there is no visible leak.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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