over heating 1938 6

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sslaugh711
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over heating 1938 6

Post by sslaugh711 » Sun Apr 29, 2012 1:28 pm

Bought the car a few months ago and have had no overheating issues until recently. Put a new water pump on and flushed the block and radiator. I did notice that while putting water in the top of the radiator it didn't rush out the bottom but did come out of the top hose inlet. I fugured since I have been driving it some rust and junk must have broken lose and is clogging it up. The fan blade is facing the correct way and there is not another termostat in the cylinder head. Before I pull the radiator just checking the forum to see if i am missing anything. Is there a better way to flush the radiator? If I pull the radiator I know the fan blade, pully, hood, rod supports will have to come off, but will I have to pull the water pump? I sure hope there is enough room without doing that. Thanks to all, Steve

Dave Czirr
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Re: over heating 1938 6

Post by Dave Czirr » Sun Apr 29, 2012 2:18 pm

No personal experience but during the PAC National in Danvers (Boston) myself and others watched two guys remove the radiator from their 1937 junior. From the mutterings and grumblings it wasn't easy but they did it without removing the water pump so even though there were a lot of changes in 1938, I'd think perhaps the same can be done on a 38.

I know it would be nice to have comments from someone who's actually done it - I'll ask around and perhaps someone else will chime in with actual experience.

genehouse
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Re: over heating 1938 6

Post by genehouse » Sun Apr 29, 2012 6:24 pm

Have you tried putting vinegar in it? I'm not sure about cars but it is an old trick we use with tractor engines and they are pretty much the same. Gene
1949 Super 8 Limousine
1939 Buick Special
1926 Star 6
1926 Star Landau (still in AZ waiting for me to pick it up!)

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JWL115C
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Re: over heating 1938 6

Post by JWL115C » Tue May 01, 2012 8:49 am

Sounds like you may have deposited a lot of rust on the top of the radiator core. Try reverse flushing the radiator. Make up a fitting to go from garden hose to the bottom outlet connection of the radiator. Have it be a good fit so the pressure and flow will force water out the inlet connection on the top tank. Do this with the radiator cap installed. I hope this helps.

(o[]o)

34PackardGuy
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Re: over heating 1938 6

Post by 34PackardGuy » Tue May 01, 2012 10:02 am

I fully agree with JWL that a good reverse flushing of the radiator should be the place to start. If you visit some old-time repair shops for flea markets (or even an old-time radiator repair shop) you may come across a flushing gun like this which is extremely effective in that it uses both water pressure from your garden hose and compressed air.
Attachments
Flushing gun 002.jpg

sslaugh711
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Re: over heating 1938 6

Post by sslaugh711 » Tue May 01, 2012 12:43 pm

I will put some vinegar in it then reverse flush it, really hoping I don't have to take it out !! thanks to all steve

Dave Czirr
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Re: over heating 1938 6

Post by Dave Czirr » Wed May 02, 2012 7:40 am

Oxalic acid, as used in the old DuPont heavy duty radiator flush, is probably more effective and potentially less damaging to solder than acetic acid (though vinegar is only about 3% acetic acid, so I doubt that's a big concern), though either has the ability to sequester iron and some of it's oxides. Regardless of your choice, don't forget to final flush with an acid-neutralizing agent such as sodium carbonate.

sslaugh711
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Re: over heating 1938 6

Post by sslaugh711 » Wed May 02, 2012 1:36 pm

Success!!, used vinegar, let it sit for a couple of hours, flushed from the top then up from the bottom a couple of times and the water flowed about 90% better than before out of the bottom. Drove it around for a few miles, let set running in the drive way, temp gauge stayed just a tiny bit from the center. GuessI will drain and do the final flush. Where can I get the sodium stuff? Thanks to all, hope it will run cool for a ong time.

Dave Czirr
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Re: over heating 1938 6

Post by Dave Czirr » Wed May 02, 2012 2:21 pm

Where can I get the sodium stuff?

Supermarket or hardware store (usually in the paint section). Or you can just make sure you've flushed several times and thoroughly.

Good to hear you were successful in solving the overheating problem so easily.

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