you should be able to bypass the heater by joining a length of hose from the small waterpump outlet to the heater hose connection on top of the plenum. (tie the original WP hose out of the way, safe)
thats what I did when my heater dumped hot coolant on my feet whilst out on a drive
I carry a 4 ft length of heater hose now in the trunk!
Thanks for the tip! I need some more specific directions though - you mean inside the bonnet, between the engine and firewall?
Or just connect the tubes from left and right side of the heater, inside the car?
Spider 2.0 - 1985
159 1.9 JTDM - 2009