36 radiator

[jacob smith]

What does the B5 stamped into the top of the radator tank stand for

[Mike in AZ]

not sure.....according to my '35-'36 book, the '36 radiator has B4 or 68 on the tank.....got a pic??....maybe Don Rogers, who wrote the book, will chime in.....Mike

[RobR'35]

I believe it's a Modine mfg. radiator.
101 tubes 212 fins 11 1/2 pints capacity.
There's probably B5 embossed on the top tank.
There were a bunch of running changes made on radiators in '35.
I've a large top tank on my Roadster,a spare with a B4 embossed on the top tank.

[Don Rogers]

Jacob, a "B5" on a 1936 radiator indicates that the radiator was made by Modine. I have not discovered anything more specific than that. The more detailed specs mentioned by RobR35 are for a 1935 small tank radiator made by Modine.

[jacob smith]

Next Question, Does the Modine (B5) radiator take a different cap then others radiators. I have 3 or for different radiator caps some orginal and some after market. I can not get them to fit right.

[Don Rogers]

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No, They should all take the same cap. Here's photos of the original Ford cap and the Everseal R-1 aftermarket cap

[G.M.]

Originally Posted by Don Rogers

No, They should all take the same cap. Here's photos of the original Ford cap and the Everseal R-1 aftermarket cap

Most caps of this type even new ones don't seal very good. You need to
drill the rivet out, install a rubber gasket the same size as the fiber one.
This will seal the cap good. 1/8" thick red rubber from the plumbing
section at your hardware store works good.The problem starts with
the radiator tubes, when the ID of all the tubes is added together, that open
area is smaller then the volume of water from the pumps being dumped
in the top tank. This restriction causes the water to back up in the top
tank and coolant is lost out the overflow tube. You have heard the
expression the water seeks it's own level. This is true but this leaves
the 22 quart system with maybe 16 to 18 quarts. Low coolant in the
radiator makes the temperature hotter. The restriction makes it
necessary to force the coolant through the tubes to provide enough
flow to cool the radiator. This causes a slight pressure on the cap
causing it to leak. What is required is a working pressure cap if the
radiator is made for one or Skip Haney's 3 lb check valve on the bottom
of the over flow tube. The pressure cap or valve allows coolant to be
forced through the tubes and top tank will remain filled up to the
filler neck for over a year. 122 tubes was mentioned by a previous
post. Most radiators I checked had 144 tubes. less tubes if they are
the same size mean less flow and hotter running engine. G.M.

[fottyjs]

Isnt the 36 a non pressurized system?

[rotorwrench]

The early Ford V8 cars were non-pressurized systems since they all had the open tube to the atmosphere. Skip Haneys valve at near the tube outlet adds about as much pressurization as a 70+ year old radiator can take but it can make all the difference in the world when it helps the coolant system keep temperatures in check.