YES, you should be using the 7psi cap. After reading arts last post I went
to look at the Moss catalog and it spells out for the long neck TR4's that its
7psi. (No I didn't doubt you Art!! Just wanted to know cost.).
>
> On Thu, 15 Oct 1998 ArthurK101@aol.com wrote:
>
> > > Well, I don't know if I've cured the problem with my TR4's cooling
> > > system
> > > (it burps a little bit of antifreeze on shutdown)-- I'm going to get
> > > a replacement rad cap (of correct size!) soon, and will play around
> > > with the hoses.
> >
> > New cap should be 7psi. Be careful - there are 4psi ones around.
>
> ARGH
>
> I've got a 4psi cap on order. Should it be 7 instead? It seems that I
> have a TR3 style radiator, with the extended filler neck (expansion tank).
> I will be installing a catch tank so's that if I do boil over I won't
> spill all over the place.
>
> Should I cancel my order and try for a 7lb cap? The parts-guys' book said
> 4lb.
>
> What will happen if I use the 4lb cap?
>
> -Malcolm
>
Brad (Lincoln Nebraska 402-464-1502)
1964 Spitfire4 BFC25720L
1966 TR4A CT72398L (Now a parts car)
1961 TR4 CT288L (Now with OD!!)
1959 TR3 TS41311L (Rusting Hulk)
1951 Dodge Truck 82217766 B-3-B-108
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