Hi Volks,
    I have found and installed a new coolant pressure gauge on by wasser
boxer.  Some on the list have been looking for more gauges  and I feel this
may be more important than any other to add to our dash or gauge panels. I
have had hoses, heaters, radiators give way at times. With a coolant
pressure gauge one will know quickly when / if there is a problem.  It is a
Teleflex  (teleflex.com) from overton's (overtons.com) .  It is standard 2
inch size, white on black,  looks good. It is a 0-30 psi mechanical style
and came with all the necessary plumbing including a 20 foot hose.
    My 87 van runs 5 -10 psi of coolant pressure (varies with load) while
driving and after shutdown rises to near 15 psi for about 10 minutes then
drops off gradually to 0 in about 45 minutes.
    It is sold by overton's as an accessory gauge for boat engine coolant
pressure measurement. Thought I would pass this along incase someone else is
looking for a new toy to check out.  Shipping and all was just under $50.
Darrell