The V8 Owners Forum -

Well I filled my water system today for the first time which subsequently p***s*d all over the garage floor.

RV8 engine confused about a connection.

A is the back of the water pump which is where the leak is from coming out of the hole. I thought this was just part of the casting and was closed.

B is the stub outlet off the water pump (pre-serpentine)

C is the Stat housing.

Have I piped it correctly? if so does A need blanking off? and if so with what do you reccomend as a blank?

Which manifold do you have fitted?

Thanks for the quick reply

I have the Offy 360

Have you got the correct thermostat housing, with the small lower pipe ?

Yes I do, Thats what C is connected to.

Mine is the other way about do you not have a connection on the rear of the manifold? heater or not ?

Yes the heater pipe goes into the back of the manifold. I think looking at your photo I just need to blank off A

Thats the thermostat bypass connection on the water pump.
If you dont have this connection on the thermostat housing you will need to blank it off. But for goodness sake make sure your thermostat has at least a 5mm hole drilled into the flange. And this hole must be at the 12 O'Clock position in the housing. Otherwise you may suffer air lock issues.

Ah so A should connect to C and B should be blanked off.

Yes the stat has a hole at the 12 0'clock position as you said.

Sorry, i'm back. yep A to C, but B on mine runs all the way to the heater, where's your heater fed from ?

It all makes sense now, I found the answer on another thread which matches up with what you say. It seems a regular topic of conversation this one. the heater feed taps in further downline near the tank. I think I will re-plumb it like your's.

Thanks for all your help guys.