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#1
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I give up
Wife car. 99 Durango 2wd 360. All original. 298,000 miles. Running hot. In last 2 weeks, have replaced T-stat (new 160*), fan clutch, water pump (bearings went bad). Burped system each time. Idle with cap off, pointing uphill to get air out. Is ok until stop for a few minutes. The length of 2 redlights is all it takes and temp runs up to 240 range. Will SLOWLY cool back down to 210 if keep it moving after that, but will not go lower than 210 and will QUICKLY heat back up if slow down. The length of our driveway (approx 1/8 mile rutted dirt road) is all it takes to jump from 210 back up to dangerous. I'm stumped. While running with cap off to burp system, I can tell the pump is circulating good, I can see the difference in flow well enough to know when the stat opens. I need help, PLEASE.
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#2
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My bets would be on a clogged radiator. Yes, you can see the coolant flowing, but you can still have a great deal of blockage. My '97 Ram did the same thing before I replaced the radiator.
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#3
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Quote:
That's exactly what I was going to say. I had that issue with a '90 Dakota and the culprit was a loose hose clamp on the trans cooler mounted in front of the radiator. The fluid leaked onto the radiator and caused dirt and dust to solidify on it. |
#4
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you could have cracked cylinder head, Itook apart 4 360,mag,head engine all running good every head cracked from spark
plugs to intake seats.from 60000 to 140000 miles on them this is why I won't use them on any engine I rebuild .good luck. did you use a rebuilt water pump the propeller could be turning wrong way saw that once. |
#5
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These are all good points. You may also want to check your radiator cap. If it's weak and won't hold pressure you will run hot. Try an 18# cap. I think yours is a 16#.
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