Thread: Water pump connections on RRC

Originally Posted by British Bulldog

Hey all,

I have asked this question a couple of times and never got a difinate answer. What I am wanting to know is the two connection on the rear of the water pump on a 3.5 carby do they both do the same thing, eg does water get pushed out of both or sucked in on both. Or are they different eg one sucks and the other pushes.
The reason for asking such a starnge question is that I have one blocked off due to having the elderbrock manifold and the rubber blocker on the middle one keeps springing a leak.
I am wondering if I can just Tee it into the pipe next to it or not to solve this problem, or will this cause more problems?

Also one other small query if when the car is running and I suck on the timing advance hose it should make some difference to the engine correct?
Just trying to chase the complete lack of power going up any type of hill.

Thanks for all the great replies in advance.
Kris

Hi Kris, I think from memory that 1 outlet goes to the manifold, the other goes to the heater. The inlet manifold also has an outlet at the rear for a pipe to go to the other heater pipe. Not sure of your manifold setup, as this is for the standard manifolds. I suppose that you could connect one outlet from the water pump direct to the heater and the other outlet to the other heater connection. As for the lack of power, try advancing the timing asmuch as possible before the motor starts to ping and also check the gap on the plugs. I'm running 1.4mm gap on minewith elect ign and fuel inj.

Hope this helps. Bob

Originally Posted by British Bulldog

.... when the car is running and I suck on the timing advance hose it should make some difference to the engine correct?

Kris

Water goes to manifold and then flows out // you must complete the flow direction ... not 2 hoses pushing water in .. or 2 hoses moving water out

Yes to difference ... grab a timing light, have motor running & then suck on the advance unit and watch the timing advance on the harmonic balancer

If the advance unit does not hold vacuum (when sucking on it) ... then replace it

Mike

Thanks for the info guys what I have at present is if you are standing in front of the engine the outlet on the far left goes under the manifold to the heater and the heater feeds back into the manifold at the rear. The other outlet on the back of the water pump is blocked off with a rubber stopper but this keeps springing a leak. Which should I do?
1. Should I run a hose from this outlet under the manifold and tee into the feed back from the heater to the manifold
2. Tee it into the feed from the water pump to the heater
3. Try and get a hose connection to screw into where the factory temp sender goes and connect this other connection to that.

Thanks for all the info guys

Originally Posted by British Bulldog

Which should I do?

Post up pictures ... You have done mods and it will be a better direction for answering the Q's

Originally Posted by British Bulldog

Try and get a hose connection to screw into where the factory temp sender goes and connect this other connection to that.

I wouldn't do this at all .... cause you will just be bypassing water flow from the motor .... and basically recirculating coolant from the bottom hose to the top hose of the radiator

if you want to block off a connection.......fit the correct hose and hose clamp to it.........

then plug the other end of the hose with a bolt or metal rod of the correct diameter and a hose clamp........


a threaded bolt works better as the threads bite into the hose and stop it from slipping out under pressure......