I don't understand fully why a inline-4 or 5 cylinder gas engine has a higher
coolant pressure on the system but it does.  My friend tried to explain that
it isn't a higher pressure problem but a higher flow problem and that upon
decelleration this actually causes the pressure to go up (brain hurting, not
really grasping concept).  Perhaps an engineer type could explain this better.

However in real world tests (brain feeling better) we have found very
consistantly that installing a inline-4 or 5 cylinder engine causes the front
heater valve to leak if it has any age on it at all, and also can cause the
radiator to die if it is at all weak.
We usually recommend replacing the valve (cheap), and explain the possbility
of the radiator problem and let the customer decide what they want to do
(expensive but a good idea).

Thanks,
Ken Wilford
http://www.vanagain.com
John 3:16
Office (856)-765-1583
Shop (856)-327-0027
Fax   (856)-327-2242