Legacy Water pump info

[Steve_D]

I have a Legacy 2.5 N/A engine going in a kitcar.
Can someone advise which spigots do what on this water pump?


It looks like all three of the small spigots go into the same area behind the thermostat but a diagram I've found shows the two that are beside each other labeled 'heater inlet' and 'heater outlet' which does not make much sense to me.

I'm loath to pull the stat at this time to take a look as I've just spent hours filling and bleeding the system with Evans waterless.

The symptoms are that the engine was up around the 95-100C mark before the stat opened and there was no heat in the heater pipes until that time. This I find strange as it is normal for all the early build of heat to serve the heater before the stat opens.

Thanks for any help you can give.
Steve

[enginebuilder]

Is your pump the same as in the picture ?, as the n/a pumps only have the 2 spigots on them, the one shown is for turbo applications, the single outlet is for the modine oil cooler connection.

The other 2 outlets are, the bigger one is the heater connection, the smaller should go to the header tank bolted to the inlet manifold.

It sounds like you have an airlock, quite common on Subaru refills of the coolant system.

[Steve_D]

enginebuilder said:

Is your pump the same as in the picture ?, as the n/a pumps only have the 2 spigots on them, the one shown is for turbo applications, the single outlet is for the modine oil cooler connection.

The other 2 outlets are, the bigger one is the heater connection, the smaller should go to the header tank bolted to the inlet manifold.

It sounds like you have an airlock, quite common on Subaru refills of the coolant system.

Hi
Thanks for the reply.
It is a 2.5 N/A but it does have the three spigots. Perhaps someone sourced the wrong pump in the past. The engine came from an auto so would that make a difference?

The spigot on its own is capped off.
The other two are connected for heater return and bottom of the header tank. Do all three go into the same cavity in the pump? If so then I don't imagine it makes much difference which goes where.

Thanks
Steve

[enginebuilder]

Yes, they are all common to each other, no divisions internally.

Seeing as you are using Evans coolant, don't be to surprised having over heating issues, I ran a few race cars with it, never ended well.

[Steve_D]

enginebuilder said:

Yes, they are all common to each other, no divisions internally.

Seeing as you are using Evans coolant, don't be to surprised having over heating issues, I ran a few race cars with it, never ended well.

Many thanks for the info on the spigots, just what I wanted to hear.

With respect to the Evans, the engine is in a Nova kitcar which is a back in the seventies Beetle based kit. With 2.5L I doubt the owner will get past half throttle so the engine will not be seeing race type duty.

Thanks again
Steve