Is there an easy way to determine if my heater core is blocked or should I just take the truck to a radiator shop?

SS

 

First, Take water hoses. put them on each of the nipples of the heater core in the engine compartment. One hose is connected to the faucet and the other hose goes to drain. Turn on water slowly. There should be water coming out of other end. This will determine blockage.


Second, if you can, hook up a couple of lines with a cut off valve on each nipple and a pressure gauge for observation purposes. Fill with compressed air to 5psi and close valves. Watch for 30 minutes. This will determine if the core has any leaks in it.

 

ThXX!

I do not think I have any leaks since the carpet is dry and clean.

SS

 

Thermostat OK? Is there a shut off valve in a hose?

 

I changed the thermostat out last summer to a 180 degree one. Thinking here in Tucson that it get a bit warm in the Summer. No valves on the hoses.

SS

 

The sale a "tap into the line" flush kit, easy and cheap. Flush and Fill Radiator Kit at AutoZone.com - Best Flush and Fill Radiator Kit Products for Cars, Trucks & SUVS

Or the 1st way will also work just fine.

 

ThXXXXXXXX

SS