GTV-6 Cooling System Pressure

[Shures <shures@xxxxxxxxxxxx>]

Josh,

My shop manual says 12.8-15.6 lb. per sq. inch.  However, the cap I bought last year from  the local Alfa Shop opens at 9 PSI.  This was a brand new and correct Alfa supplied part unless they got confused - they don't usually.

My coolant reservoir opened at the seam as most newer ones do and the car ran with probably less than a couple of pounds for 6 weeks last fall. It stayed nice and cool.  When I went through the cooling system to bring it up to spec, I pressure tested the cap and figured 9 PSI is sufficient.  I tested the system to the same pressure and figure I will be OK.  I've run in 88 F weather since with no problems.

It is a bit much for a hobby mechanic like me but I did finally buy a Stant cooling pressure tester which helped me locate a leak and of course test the cap.  I highly recommend the $80 at NAPA investment.  Saved $25 worth of Mercedes coolant and the hassle and frustration of being off the road during the Prime season.

Scott Shure
85-1/2 GTV-6
Scuderia Saab

Date: Fri, 4 Jul 2003 13:57:56 EDT
From: Alcon98340@domain.elided
Subject: GTV (and other Alfa's for curiosity) cooling system psi?

Greetings all,
I was wondering if anyone knew the correct pressure for the cap on the 
coolant reservoir for GTV6's. Mine failed a pressure test, so I replaced it with a 
Stant 7psi cap. Is this correct, or should the should I be running a 15psi cap?
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