The 54 239 also had a smaller water pump.

  Dennis in Lititz PA

Just hit Delete for the extra Post. So if Restricting the Bypass is a good Idea Why did Ford INCREASE the Size of the Bypass for 1955?

  

Since '55 and up pumps are bigger, maybe they flow more and the larger bypass allows for approximately the same percentage of bypassed coolant as the smaller pump with the smaller bypass.

Another possibility is that in manufacturing, compromises have to be made to accommodate a wider range of conditions.  Using the cooling system as an example, that might mean that it works more or less ok in most conditions but that doesn't mean it's ideal for all.  So there may be circumstances where the end user finds it necessary to alter some aspect of the system to tailor it better to the exact environment they are in.  This seems to be the case with restricting the bypass, which seems to have fixed a problem for several members here.


Lawrenceville, GA

I tried the bypass in my Tbird.  Besides the restrictor, you have to modify the thermostat by drilling holes around it.  Just using a restrictor made the initial warm up go right to very hot (gauge was pegged) and I was very uncomfortable with that even though the temp came down to normal very soon.  I removed the restrictor (I did not want to drill the holes in the thermostat). 





54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

So there may be circumstances where the end user finds it necessary to alter some aspect of the system to tailor it better to the exact environment they are in.  This seems to be the case with restricting the bypass, which seems to have fixed a problem for several members here.

I wish someone would explain to me how restricting by-pass flow will help overheating unless the pump is turning too fast or using an aftermarket Hi-Flow pump..

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Search for posts by greenbird56 on the subject.

The idea is to direct more coolant through the radiator to be cooled, instead of allowing it to recirculate through the engine and absorb more heat.


Lawrenceville, GA

Guys, I am sure glad I posted my question on the restrictor here. Paul, I had forgotten about having to drill holes in the thermostat. Since I do not know how to search the archives I was going from memory - not a good idea for me.
Anyways since I was not having cooling issues I will replace the leaking pump, leaking radiator and hoses and keep it as built from the factory. The only difference will be the Champion aluminum radiator. Thanks again to all

AKA   Bob-93021

If it uses the same Diameter Stat as Y Block there is a very reasonably Priced High Flo Stat from napa. The opening is bigger than regular stats. I think Paul has one in His and I used One in mine.Anything U can do to increase Flow after it opens helps cooling. I have an Aluminum Rad in mine and not wanting it to stick out like a sore Thumb I painted it Black with  Bar-B-Q Paint. I used some medium Sandpaper to give the Tanks some Teeth and then  I used Vinegar to etch the Aluminum Tanks and it worked Well. Not much U can do with the Fins as far as Prep. Just Paint as is.

  

Search for posts by greenbird56 on the subject

My browser and this style webpage don't get along well..

The idea is to direct more coolant through the radiator to be cooled, instead of allowing it to recirculate through the engine and absorb more heat.

Sorry, I don't see the benefit of approaching overheating in that fashion. Read Paul's response.

He has a BIRD doesn't he (greenbird56)? That is an entirely different cooing system problem, factory designed.

For a PASS CAR or LT, a HI-FLO THERMOSTAT will perform better (IMO).

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It is a bird but if I'm remembering right, a part of the changes was removing the water pump spacer, then spacing the pulley to keep the belt in line, which then makes it like every other Y and potentially applicable to all, which is why some others have benefited from it.


Lawrenceville, GA