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overheating 66 Classic 232

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Trader View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Trader Quote  Post ReplyReply Direct Link To This Post Posted: Aug/04/2020 at 11:45am
If it is still belching coolant, a simple combustion gas test in the coolant will tell you if there is a head gasket leak.
Your post on the blocked flow of the old rad seems troublesome. If someone was using well water and not distilled water to keep topping up the cooling system, I've seen rads and engine blocks filled with concrete like calcium deposits.
Take out the block drain plug and try flushing the block out before putting in the new rad.
Try out the new rad with good coolant/distilled water.
Measure how much the system takes and compare that to the service manual
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Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: Aug/06/2020 at 6:53pm
I would never use well water. Deep wells have tons of minerals, iron, calcium, other fun stuff. Even a shallow well at, say, about 35 feet, will have enough minerals to cause issues. I have to keep changing and cleaning things around the house because our well water has a lot of minerals in it and it's a "shallow well". The well on the farm was about 220 feet deep and you could taste the minerals - but I loved the taste LOL. 

Belching coolant (going by Trader's post, didn't read backwards) means one of two things - 
Combustion gases getting in - head gasket, cracked block or head, etc. 
or
A hot spot causing the coolant to boil. That gas from boiling has to escape like you belching and almost barfing in your mouth (ew, gross!!!!!) - same effect. 

A BAD CAP can cause coolant belching and over-heating - if you haven't already tested the cap for 14 psi, do so. IF it fails, replace it, period. It's not uncommon for parts of the engine to cause coolant in spots to hit 212 degrees and with no pressure, IF it's pure water, it will boil. 
I assume you are running a 50/50 mix of antifreeze and water????? If not, you are asking for trouble. 

I don't run distilled water, but I won't run well water, and some towns I won't run their water. Some town water I run with no issues. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote vinny Quote  Post ReplyReply Direct Link To This Post Posted: Aug/06/2020 at 10:23pm
That year water pump probably came with a plastic impeller and it may have disintegrated. It happened to me.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: Aug/06/2020 at 10:24pm
I've seen even steel impellers on reman pumps come loose and cause a heating issue..........
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Post Options Post Options   Thanks (0) Thanks(0)   Quote amcenthusiast Quote  Post ReplyReply Direct Link To This Post Posted: Aug/07/2020 at 8:03am
Your 232 has a bad head gasket.

I believe you can just unbolt the combination intake/exhaust manifold and move it over to the side a bit in order to pull the head off. -Use various blocks of wood to support the weight of the assembly from underneath?

This would be a good time to overhaul the rocker shaft system; the front lubrication holes for the rocker arms nearly always get plugged up first. Use a wire to unplug the holes, clean all the parts -blow out the rocker shaft with compressed air if possible. Reassemble the rockers back on the shaft with Lucas assembly lube or STP.

Use a 'shop vac' to clean off the top of the block, especially to clean the head bolt holes and the oil  passageway to the rocker shaft.

Don't overdo the spray on Copper Coat head gasket sealer -just a thin light coat; more is not better.

Get a Chilton's Repair Manual!
443 XRV8 Gremlin YouTube video: https://www.youtube.com/watch?v=cI4P8vlZ_1s
XRV8 Race Parts website: http://amcramblermarlin.1colony.com/
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bbrooks2 Quote  Post ReplyReply Direct Link To This Post Posted: Aug/07/2020 at 12:19pm
Thank you all, I knew I would get good advice here. When I get a break from the hay field I will get back on it.
64 CJ3B
66 Classic 770
77 Wagoneer 401/400
88 J20
It's not how many words you use it's how you use your words.
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