The radiator cap on my Perkins diesel engine (Perkins Perma M30, installed by the PO around 1982) is badly rusted. It’s easy to find a replacement that fits physically, but what opening pressure rating should it have? At 2000-3000 rpm, the temperature gauge reads about 175 F degrees.
Eric Frank Cat's Paw C&C 35 Mk II Mattapoisett, MA
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