I replaced my water pump this weekend. No leaks, Seems to work, but I run the car for a minute or two to see if the water and thermostat are working correctly. The water just rises and keeps rising until it bubbles out. It is not really hot so it isn't boiling.

Could it be my heater core? Is the pump working? All of the youtube videos that show how to do this run their cars w/o radiator cap. What is wrong? The pump and thermostat are brand new as are all belts and hoses. I did run the heater core hoses myself and wonder? could they be backward? does it matter?

 

I see mention of a bypass valve. It the valve neccesary? I have a 4bbl carb and never had one (since I bought it).

 

There may be a chance you got the wrong rotation pump for your engine.
V-belt is standard rotation. Serpentine is reverse rotation. They look the same physically

The bypass is for the heater core.

 

Do I need the bypass? Can I run the hoses strait to the heater core?

 

Yes you can run the hoses straight to the heater core. The bypass valves purpose is simply to divert the coolant from the heater core and thus make the interior of the car a little bit cooler. It really makes very little difference anyway.

 

Hello pimpimusmaximus!!

Just asking, did you put the thermostat in upside down????

It seems that there is no circulation, but just a straight dump, as the coolant can't go anywhere's, but out the radiator!!!

It is after all a "water pump", and it will pump until it cavitates, and then it will stop, only after it pumps all the coolant out that it can!!



Also, once you fill the rad up, and before you start the car, move the defrost to the full heat, full defrost positions, and run the fan on high, then start the car!! Run the car until the thermostat opens up!! This will help to get any air pockets out of the system!!

 

You do realize the t-stat is closed until it's opening temp when installed correctly ?

 

Yes I do, and there is also a bypass hole on the block, and the pump, however he said "it is not really hot" when it's overflowing, so I figured that the t-stat wasn't opening at all, so no flow once the water starts to heat up, but just pumping the water out!!




He obviously has a blockage somewhere, and based on his post, I took the assumption that he changed his t-stat at the same time also, doesn't hurt to take a look to verify it!!

 

Figure out your statement.

 

Hello deadbird!!

If you read up on "automotive thermostats" maybe you'll see my reasoning!!

Incorrectly installed, it will act as a baffle and force the coolant to change direction in order to pass by it!!

 

So, prior to opening temp, all cars should puke because since the thermostat isn't open, the coolant is reverse flowing (changing direction)?

Maybe we're misunderstanding each other but, the SBC water pump either moves water (freely) or, it doesn't (blocked). It doesn't build water pressure. And I have no clue how, due to 'blockage, it could possible reverse flow (change direction).

But, to try a demean me as if I'm f'n clueless, I've been on these boards for over 10 years (yes, prior to 2000) and obviously, I own a few sbc cars.I do believe I have a grasp of how the t-stat and cooling system works for these cars.

 

Hello deadbird!!

I was wondering how long it would take for you to use the "I've been on these boards for over" "x" number of years routine, didn't take too long, but as to trying to "demean" you as "f'n clueless", not intended at all, it's not my fault that you can't take a "wider" look at things, and start to use inappropriate language, when you don't get your way, or meet up with some opposition!!!

Too bad the OP of this thread doesn't come back with what the problem is/was!!



P.S. They do tell you to install thermostats in a particular direction also, I wonder why they do that????

 

I'm a little flattered that my answer was so important for you to wait for, even though you can't explain how the pump will reverse flow :blush:

Expand my horizon sage, I'm not against it.

Regardless of the OP, tech discussion is good banter.

 

Hello deadbird!!

I agree, tech discussion is good banter!!



Flogging a dead horse isn't!!

 

So, explain. Please.