I am having some problems with my cooling system:
I am considering installing a 7# cap in lieu of the 4# cap.....I cant find one anyone know a model # ?

Also considering a new Radiator anyone have a good source?

Thanks
Ed
Near Philadelphia

 

What are your cooling problems and why do you think a 7# cap would solve them?

 

Scott, after a ride of 100/200 miles I find that I have to add 4 to 5 quarts of coolant, I don't see any leakage other than at the overflow so I am thinking that what a local radiator man told me may work. That is before installing a new radiator to try the 7# cap and see if that helps

Thanks
Ed

 

http://www.summitracing.com/parts/snn-10228/overview/

Not the supplier of choice - this should be what you are after.

I'm a bit leery of a cap as the fix - curious to know how this turns out.

 

Thank you for the Stant part number......I will get one and let you know how it works out

 

I wonder how this will come out, too. Sixty plus year old cooling system designed for 4 psi pressure now going to 7 psi. Perhaps the radiator guy sees a sale in his future.

 

That is a lot of coolant to lose without a trace. Maybe install a catch can on the overflow tube and see what you get? Otherwise it could be internal......is it missing or fouling any plugs? Oil look OK?

 

I have heard of people installing too hi a pressure cap and doing damage to cooling system. I don't know if 3# increase would do it, did it work ok last year or before? Is tailpipe dry?

 

Is the existing cap new or old? Maybe 4 lb cap is just shot and not holding 4 lbs

 

The cap is new and the way it seats on the radiator looks good. I had figured on just going ahead and replacing the radiator but the radiator guy suggested trying the higher pressure on the cap, so if the radiator goes that is what is needed. Oil looks good, tailpipe is dry. Trying a catch can sounds like a good idea to try, it may prove where the coolant is going

 

i thought this would be a good idea untill i did it and both water pumps blew the seals or whatever they use

 

Mr Need, what problems were you having when you went to the 7#cap instead of the 4?

Ed

 

my water pumps leaked around the shaft i don't think they are designed for allot of pressure ether.