Mmm, well Ken I agree that the whole cooling system should be examined
closely after a swap, for no other reason than it is probably old.
I don't believe that there is faster coolant flow in a gas inline 4. I guess
you could examine the various water pumps and pulley speeds to
prove/disprove this.

If the pressure is increased by the action of the pump (mmm, skeptical!)
then does an inline 4/5 have a different pressure cap on the expansion tank?

Alistair

on 11/1/00 4:38 am, KENWILFY@aol.com at KENWILFY@aol.com wrote:

> 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
>