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  #21  
Old 05-07-2012, 04:35 PM
Charles Nix Charles Nix is offline
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Default Running hot

I will check the heat riser valve and the impeller on the water pump before doing anything else, but she's running hot and boiling over after shut down ......the temp guage pegs 2/3 over towards hot after a few miles on the highway without the A/C even running. She gets hotter at idle. I have put a new t'stat in, flushed the radiator, and put in new coolant. I'm afraid I either have a partially blocked radiator or worse. As i said, I know the shroud and 6 blade fan can't hurt, so I'm going to try that.

After giving your comments more thought, it makes a lot of sense to check the sytem out methodically one component at a time. Thanks for helping me see the light.

Last edited by Charles Nix : 05-07-2012 at 05:01 PM. Reason: change in plans
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  #22  
Old 05-07-2012, 06:15 PM
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tbird430 tbird430 is offline
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Red face

I bet your radiator will need to be recored....

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  #23  
Old 05-08-2012, 12:12 AM
gaffney1951 gaffney1951 is offline
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Default Over heating ...

You might want to make sure that your lower radiator hose isn't collapsing. Not that uncommon. Mike
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  #24  
Old 05-08-2012, 03:33 PM
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Cool

Mike has a great idea because the lower hoses are often overlooked. These babies run hot enough without proper cooling
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  #25  
Old 05-08-2012, 03:57 PM
Charles Nix Charles Nix is offline
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Default Running hot - aluminum radiator?

Thanks for the advise. I'll change the bottom hose for sure since I am going to pull the radiator to have it checked out, anyway. Speaking of pulling the old radiator out, should I just go ahead and put a new Aluminum Radiator in and be done with it?
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  #26  
Old 05-08-2012, 04:21 PM
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Default 352 running hot - where to start?

Your present radiator might just need to be re-cored, as mine did. I would suggest that you find a company locally who specializes in re-coring radiators, have it tested, and get a cost estimate on it. You could also check to see what an aluminum one would run you. If it were me, if my OEM radiator (if that is what you have) needs to be re-cored and is in good shape, I would stick with it.
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  #27  
Old 05-08-2012, 04:36 PM
Charles Nix Charles Nix is offline
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Default Recored radiator

Does "recored" mean all new tubes?
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  #28  
Old 05-08-2012, 05:53 PM
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Yes, they just reuse your side tanks (so to speak).
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  #29  
Old 05-11-2012, 05:10 PM
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Default

Quote:
Originally Posted by simplyconnected View Post
I only have one pic to share:

I'm kinda surprised nobody commented on the heat riser.

Mine looked almost this bad last year when I went for the rebuild. I also had scaley rust inside that broke up quite nicely with a steam cleaning at my local machine shop. I haven't had a chance to get her back on the road yet due to moving (again!) but I'm sure cleaning all that out solved the problem. I have run it on a break in stand I built and all seemed good.

If you are already overheating, I would watch out this summer if you are running the stock fuel pump. I had some wicked vapor lock problems years ago growing up in the desert. It wasn't a problem until I shut her down, then I'd have to wait a good hour or so to get going again.
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  #30  
Old 05-13-2012, 11:18 AM
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I thought Grants idea of a reference temperature was outstanding not to mention it gave me another excuse to drive the Tbird - so here's what I found......

The hottest temp I read on the bottom hose was 163 deg. On the top the hottest temp was 187 deg. Both hot spots were on the inlet and outlet hose flanges on the radiator itself. The readings were taken after a 20 mile trip down the interstate then idling in a parking lot - outside temp was about 75 deg. Temp gauge was pointing barely past the "M" in temp going down the interstate and just before the "M" while idling although I realize most gauges are calibrated differently - just info.

My system is about as stock as you can get - original radiator, 4 blade fan, stock replacement water pump and 13lb radiator cap. Only mod from original is that I have added an A/C condenser but it is not connected - just sitting in place in front of the radiator. Heck - as far as I know even the thermostat is original.

Hope you have made good progress on your system Charles.

Eric
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