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cooling problems #1237374
05/21/12 08:49 PM
05/21/12 08:49 PM
Joined: Mar 2009
Posts: 142
Fredericton NB Canada
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471b1dart Offline OP
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471b1dart  Offline OP
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took my road runner for a short drive and it got up to 250* , came home changed thermostat same thing again , took therostat out , same problem , Its a 70 with a 383 pretty much stock, 26" rad that looks new , but noticed not much coolant circulating could the water pump go bad with out leaking??

Re: cooling problems [Re: 471b1dart] #1237375
05/21/12 09:23 PM
05/21/12 09:23 PM
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Posts: 28,068
Irving, TX
feets Offline
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It's rare for a pump to fail where it won't move water. Maybe the rotor fell off.

I guess you opened the radiator then warmed up the engine to see if water was moving?

Is the upper radiator hose getting hot?

Grab a temp gun and start looking for cold spots in the cooling system. That will show you where the water isn't moving.


We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
Re: cooling problems [Re: 471b1dart] #1237376
05/21/12 09:57 PM
05/21/12 09:57 PM
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Lincoln Nebraska
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RapidRobert Offline
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partly plugged rad. I'm assuming there's a proper fan/shroud in place


live every 24 hour block of time like it's your last day on earth
Re: cooling problems [Re: RapidRobert] #1237377
05/21/12 10:14 PM
05/21/12 10:14 PM
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New York
EF8aar Offline
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New York
RapidRobert ... you helped me out with my problem on my 340 last year.
It ended up being a worn pump shaft where the impeller would freewheel intermittently... I never thought it was possible, and it was the craziest thing to sort out, but in the end it was the easiest fix...

https://board.moparts.org/ubbthreads/show...rue#Post6857083

Re: cooling problems [Re: feets] #1237378
05/21/12 10:18 PM
05/21/12 10:18 PM
Joined: Mar 2009
Posts: 142
Fredericton NB Canada
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471b1dart Offline OP
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Fredericton NB Canada
both hoses getting hot , has a recored rad a 7 blade none clutch fan , also has the shroud

Re: cooling problems [Re: 471b1dart] #1237379
05/21/12 11:28 PM
05/21/12 11:28 PM
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ahy Offline
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Pretty easy to pull the WP and check it out. That's what I'd do next.

Re: cooling problems [Re: RapidRobert] #1237380
05/22/12 09:35 PM
05/22/12 09:35 PM
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Posts: 142
Fredericton NB Canada
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471b1dart Offline OP
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pretty sure I found the problem , the lower rad hose is collapsing as soon as you take the engine any amount above Idle, it sat and idled 30+min at 190* but climbed steady and fast when reving the engine. thanks for all the sugestions on where to look

Re: cooling problems [Re: 471b1dart] #1237381
05/22/12 09:37 PM
05/22/12 09:37 PM
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Sacramento, CA
cal_gecko Offline
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Sacramento, CA
Quote:

pretty sure I found the problem , the lower rad hose is collapsing as soon as you take the engine any amount above Idle, it sat and idled 30+min at 190* but climbed steady and fast when reving the engine. thanks for all the sugestions on where to look




I had the same problem... I tried finding a lower rad hose that had the wire spring in it, and had no luck. I bought a generic upper rad hose in the same diameter that had the spring inside it, .. pulled the spring out, and put it in my lower hose.. no more collapsing hose

Re: cooling problems [Re: cal_gecko] #1237382
05/22/12 10:22 PM
05/22/12 10:22 PM
Joined: Jan 2003
Posts: 28,068
Irving, TX
feets Offline
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I fixed that problem with a wire coat hanger.


We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
Re: cooling problems [Re: feets] #1237383
05/23/12 06:40 AM
05/23/12 06:40 AM
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Athens, Greece
Pyper70 Offline
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Quote:

I fixed that problem with a wire coat hanger.




^^^ What he said....coat hanger and a PVC pipe...coil it around and slip it in


Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s






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