Glenn,
According to my sources, somewhere during the Mk3 production the
radiators were upgraded. After that the Caps were rated at 13psi.
Previously, they carried 7psi.
Joe Curry
gbowley wrote:
>
> Speaking of Radiator caps, what did you end up with for a pressure rating? I
> have a '75 Spit, and have had conflicting reports of the proper rating for the
> cap. Some people have told me 14psi, others have said 10, or even 6. Any
> suggestions? BTW: I am now running a 14psi cap.
> Thanks in advance!
>
> (Richard Triplett) wrote:
>
> > Living in the West Texas desert presents unique problems with overheating
> > LBC's. I would like to pass along some tips I learned over the years:
> > (1)Don't remove the thermostat in an attempt to prevent overheating,
> > because the thermostat does several things; it maintains the engine at its
> > most efficient temperature, slows flow of water through radiator to ensure
> > heat dissipation (if water flows too fast, heat transfer will be reduced),
> > and helps maintain proper system pressure.(2)Make sure the shroud (if
> > fitted) is in good shape and in place, air, like water and current, takes
> > the path of least resistance which is, in this case, around the radiator
> > rather than through it. It's amazing how much a proper shroud will reduce
> > overheating. (3)don't paint your radiator! I learned this at a hydraulics
> > class, paint is a good insulator and will reduce efficiency of heat
> > transfer.(4)if you suspect radiator problems, a non-contacting infrared
> > temperature gauge will detect cool spots which represent loss of
> > circulation, also input and output temperature differences can help
> > troubleshoot the system(5)use the proper mixture of anti-freeze(50-50 works
> > for me)(6)install an overflow reservoir if not provided(7)use proper
> > pressure rated cap. I learned most of the above the hard way, sure wish
> > this group was around in the 70's!
> >
> > Richard Triplett
> > 62 TR3A
> > 78 Spitfire
> > 85 XJ6
> > Slow day at work
>
> --
> Glenn E. Bowley, ABOC
> Mechanical Designer/
> CAD Systems Administrator
>
> Gerber Coburn Inc.
> 55 Gerber Rd.
> South Windsor, CT 06074-3244
> gbowley@snet.net
--
"If you can't excel with talent, triumph with effort."
-- Dave Weinbaum in National Enquirer
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