Quote:
Originally Posted by 9FF
Point you thermo at the thermostat housing. Does it open at 80? The upper hose will get hot when it opens. What is the guage switch and guage reading at that point?
Point your thermo at the fan switch. Does it activate at 85? The fans will run when it activates. What is the guage switch and guage reading at that point?
Do the fans work as they should? One should come on full with the a/c on. With the a/c off both depend on temp and will be on half or full depending on temp. Check Clarks for exact operation.
I understand your concern and would like to see this resolved. I think this step-by-step diagnostic of what's actually going on will help and help you clear this up.
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I apologize in advance for the long entry here but I like to be thorough. Here is an interesting tid bit. I tested the old 71C thermo stat per clarks:
"Place the container on a heat source and heat the water until it reaches the temperature stamped on the thermostat. When this temperature is reached, the thermostat should be fully open."
When did the test it didn't start to open until 75C I let it go to 80C and it was maybe 1/2 open.
"Remove the container from the heat source and allow it to cool. The thermostat should be fully closed when the temperature decreases to approximately 10 degrees below the rated temperature."
Upon cooling when the water temp was about 72C the tstat was barely open, juuuuuust barely. At 68-70C it was fully closed!! I could see black gunk type build up in a small spot on the tstat, we know the old one was bad. Maybe the new one is bad too (defective)?
Like you said, I used my IR thermometer and scanned the top radiator hose when the fans came on and then the lower hose. I went back and forth probably 5-7 times and I was getting a range of temps
Top hose was reading 102-115F (Surface temp of the hose near the clamp.)
Bottom hose was reading 87-95F (again surface temp of the top of the hose coming out of the rad into the WP, oddly enough the bottom of the hose wasn't even in the ball park)
Both readings were with the fans on. I'm really have no idea if this is a sufficient drop or not. I'm also not sure if this is the most effective way to measure this. In the end I saw a max temp of 103F on the bottom hose and it appeared to drop to the high 80's.
Radiator? Thermostat? Both? Something else? It can't be something else, I mean what in the world would cause this thing to run at 3/4 and NEVER come down. Fans are working as they should, it's just not cooling and I can feel plenty of air being pulled through the condenser.