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Old 05-23-2009, 01:29 PM   #21 (permalink)
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Maybe I forgot to mention that there's no grille block to speak of. When the weather warmed-up a couple of months ago, the pie pans came out (same like the last 3 years).

I recently moved the front license plate out of the way, so we have near 100% air flow across the cooling surfaces.

Frank's earlier question has some merit. Nothing changed since last summer, and I'm having problems -- so another variable changed. Could the added water be masking something that isn't working properly -- like a stat, weak w-pump, crummy replacement rad? I went to NAPA so I got the "good stuff"


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Old 05-23-2009, 03:05 PM   #22 (permalink)
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Oh. . .No grill block. As this is ecomodder and you are having coolant issues I assumed it was one of the myriad grill block problems.

In that case something is probably dysfunctional. Most likely the water pump. If its not that. . .pour water through your radiator with the drain plug uncapped. If its coming out at a slower rate than its going in you've got some blockage.

You can also take all the lines off of things and run water through them. Just be sure to put the plugs back on and reattach the tubing.
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Old 05-23-2009, 03:10 PM   #23 (permalink)
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I don't think there's such a thing as a "weak" water pump- they either work or they don't.



free air circulation through rad

free coolant circulation through rad
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Old 05-23-2009, 03:11 PM   #24 (permalink)
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Pumping water through the "water jacket" won't hurt the car. The small percent of glycol to the mix will also help to avoid rusting if it starts boiling off fluid.

The engine is not quite scorching hot enough to make oxidation an instant problem and its not being exposed to other corrosive elements inside the jacket(the hoses and most everything else is designed to operate with polar fluids).

I just finished repairing a 1948 Ford V-8 Flathead that only ever had water pumped through its jacket and its fine, minimal rust and corrosion even though it sat around. . .for 40 years before I rebuilt it. Before that it had been run from 49 to 62(13 years with just water in the summer).

The water corrosion is a non-issue at the exchange temperature without other corrosive agents like salt. Ethylene glycol(anti-freeze) will aid in lubricating areas that are corroding to slow the process, but even so. . .the engine will have to be rebuilt before the corrosion becomes a problem.
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Old 05-23-2009, 03:14 PM   #25 (permalink)
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I agree with Frank's latest post. I doubt the pump would go halfway. The only way that might happen is if the impeller blades broke or if its piston driven if its cracked.

Definitely run water through your lines with them unattached and see if its blocked or not.

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