[dirtlover]

I have an Edelbrock intake on a 350 engine and the intake has a fitting for the heater hose. The water neck has a fitting for a heater hose also. I was reading a manual that says one hose goes to the water pump. So I have three fittings and 2 hoses. Which is the best way to connect these and which should go to the top hose of the heater core? Also, where do I connect the tempature sending unit since I do not have the fitting in the head (327 heads)? Should this be mounted in ANOTHER fitting in the intake manifold?

[JimM]

Top hose on heater core goes to water pump.
Bottom goes to the intake manifold.
Put the temp sending unit in the thermostat.

Also the hoses are different sizes, 5/8 & 3/4"

[dirtlover]

Yep, one hose is 3/4 the other is 5/8. The shouldn't be a big deal, is it?

[JimM]

No, it's made to work that way.

[Steptoe]

Also the hoses are different sizes, 5/8 & 3/4"

Off subject and out of interest ...why diffrent sizes?
I have same size 17mm, because of routing thru a LPG vapouriserand heater, and dont have any issues.

[JimM]

They just made em that way... top tube on heater core is 3/4, bottom one is 5/8.

17mm, huh?

They make rubber hose in metric too? geez....

[Codi]

Isn't the thread boss on a thrmostat housing for a vacumn switch and not a temp sensor? If a temp sensor is in the housing, it would not register until the thermostat opened. Is this correct or should I stop drinking?

[yellow69RS]

Originally Posted by Codi

Isn't the thread boss on a thrmostat housing for a vacumn switch and not a temp sensor? If a temp sensor is in the housing, it would not register until the thermostat opened. Is this correct or should I stop drinking?

I say you are correct, A temp sensor in the Tstat housing would possibly fluctuate as the stat opens and closes. I haven't owned a 327 in a looonnng time but weren't the original senders in the intake near the heater hose?

Jeff

[JimM]

ya, they were in the intake, but lots of intakes only have the one fitting for the heater hose.
I was just thinking in the thermostat housing would be more useful than in the toolbox...

[Steptoe]

17mm, huh?
They make rubber hose in metric too? geez....

Well NZ went mteric back in the early 70s so yeah

A temp sensor in the Tstat housing would possibly fluctuate as the stat opens and closes. I haven't owned a 327 in a looonnng time but weren't the original senders in the intake near the heater hose?

Like jim says some had in the manifold and others in the head...
As far as flutuating goes no...
The say water in the head heats up gauge goes up, thermost opens, gauge often drops marginallt then climbs as the engine warms
in the top of the valley cover...there is stuff all water movement, water heats up in engine and slower in the valey cover, thermostat opens, the gauge then goes up quite fast as the engine water passes it, then slows as the engine continues to warm up
And in the thermo housing there is enough water passing thru the themstat by pass hole to do the same as in the top off the valley cover
So either way..jim is right , it realy doest matter.

[dirtlover]

So, I still have another hole in the manifold I could put the sending unit. Do I do this and plug the thermostat housing?

[JimM]

If you have another hole in the manifold, use it for the temp sender.
You didn't mention that you did.

[dirtlover]

That is what I will do. Thanks for all your help!!

[novaderrik]

Originally Posted by Steptoe

Off subject and out of interest ...why diffrent sizes?
I have same size 17mm, because of routing thru a LPG vapouriserand heater, and dont have any issues.

the different sized hoses had something to do with the noise the water makes as it goes thru the heater core. the big hose is on the "cold" side where the water is getting sucked back into the water pump. it might also create a lower pressure on that side of the core that causes the water to flow thru better, since the water is not only cooler but also allowed to expand in the larger hose.