SB to BB water pump question

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

scottydale79

Junior Member
Joined
May 23, 2012
Posts
15
Reaction score
0
Location
Arkansas
First Name
Jordan
Truck Year
1979
Truck Model
K 20 scottsdale 4x4
Engine Size
Was sb400 now bb454
Ok.. I know I've been wearing everybody out with questions but I've got another :)

I pulled my SB and dropped the BB in. The water pump on my SB has the main radiator hose on the bottom and that's it. When I look at the big block there is the radiator hose at the bottom, and two ports on the top. I assume the one on the right will just attach into the intake right under the port where the radiator hose connects with the intake. My question is where does the hose on the left run to? On my SB one of the heater hoses ran straight to the radiator and one ran to intake... So I will now hook one heater hose to intake (like it was) and I guess hook the other to the radiator (like it was) so what do I do with the port out of the water pump?

Sorry so long, and sorry I can't figure out how to upload a pic from my phone..
 

89Suburban

Supporting Member
Supporting Member
Joined
Dec 7, 2010
Posts
24,569
Reaction score
5,931
Location
Southeast PA
First Name
Paw Paw
Truck Year
2007
Truck Model
Chevrolet Tahoe LT
Engine Size
5.3, 4WD
You should also be swapping the radiator out which will not have the heater hose fitting. I do not suggest running that big block with the small block radiator.
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
29,207
Reaction score
24,336
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
You should also be swapping the radiator out which will not have the heater hose fitting. I do not suggest running that big block with the small block radiator.

My big block radiators have the heater hose fitting too.

It doesn't really matter much if the hose runs to the radiator or the water pump. If the current setup runs to the rad, just put a pipe plug in the pump outlet.
 

scottydale79

Junior Member
Joined
May 23, 2012
Posts
15
Reaction score
0
Location
Arkansas
First Name
Jordan
Truck Year
1979
Truck Model
K 20 scottsdale 4x4
Engine Size
Was sb400 now bb454
Thanks man
 

89Suburban

Supporting Member
Supporting Member
Joined
Dec 7, 2010
Posts
24,569
Reaction score
5,931
Location
Southeast PA
First Name
Paw Paw
Truck Year
2007
Truck Model
Chevrolet Tahoe LT
Engine Size
5.3, 4WD
My big block radiators have the heater hose fitting too.

It doesn't really matter much if the hose runs to the radiator or the water pump. If the current setup runs to the rad, just put a pipe plug in the pump outlet.

I stand corrected and learnt sumtin new today. :patriot:
 

scottydale79

Junior Member
Joined
May 23, 2012
Posts
15
Reaction score
0
Location
Arkansas
First Name
Jordan
Truck Year
1979
Truck Model
K 20 scottsdale 4x4
Engine Size
Was sb400 now bb454
Would it hurt to plug the original port in the radiator and run that heater hose to the new port on the pump?
 

towman

Full Access Member
Joined
Mar 11, 2011
Posts
532
Reaction score
7
Location
harrisburg pa
First Name
jay
Truck Year
1987
Truck Model
v10
Engine Size
5.0
you could do it that way but easier to get a fitting to block off water pump, they are pipe thread and easy to come by
 

scottydale79

Junior Member
Joined
May 23, 2012
Posts
15
Reaction score
0
Location
Arkansas
First Name
Jordan
Truck Year
1979
Truck Model
K 20 scottsdale 4x4
Engine Size
Was sb400 now bb454
Oh ok! Thanks
 

Latest posts

Forum statistics

Threads
42,332
Posts
913,847
Members
33,832
Latest member
Kipps5000
Top