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02-07-2006, 10:52 PM
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#1 |
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Registered User
Join Date: Jan 2006
Location: Houston
Posts: 434
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BB Heater Hoses
I have a 71 SWB BB with ac. The large heater hose is connected to the radiator on the passenger side top. This hose is very close to the ac compressor clutch and belt and looks like it could rub. After reading the attached post, I am a little confused and have a question. Assuming the picture of the BB heater hose routing is correct, why would GM place the connection on the radiator when there is provision to route under the ac compressor to the water pump? GM usually took the safe route. Is there a way to prevent the hose from hitting the ac clutch and not kink the hose at the radiator?
My 68 camaro BB is routed to the water pump and the heater works fine. http://67-72chevytrucks.com/vboard/s...light=radiator |
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02-08-2006, 01:18 AM
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#2 |
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Senior Member
 Join Date: Mar 2003
Location: Colfax-California
Posts: 8,599
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Re: BB Heater Hoses
The hose to the radiator is the return hose, factory, I believe the hose went into the water pump which is also return.
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02-08-2006, 11:11 AM
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#3 |
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No,I DON'T have Tourett's
Join Date: Mar 2005
Location: Reno, NV
Posts: 556
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Re: BB Heater Hoses
That hose originally went to a vacuum operated valve onthe passenger side front fender. This valve kept hot water from circulating through the heater core when the AC was engaged.
__________________
'72 K5 CST 350/350 Daily Driver '69 GMC3500 Camper Special CST Flatbed 396/400 Upgraded to show truck '69 GMC 2500 L6292, 3spd beater |
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02-08-2006, 11:36 AM
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#4 |
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Dork For Days
Join Date: Aug 2005
Location: Dallas
Posts: 407
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Re: BB Heater Hoses
About a month after I bought my truck I noticed that the hose you speak of was worn 3/4 through from rubbing on the compressor just like you said. When I changed the hoses I re-routed that one behind the positive battery cable, which puts just enough pressure on it to give it good clearance.
Why is it designed like that you ask? 
__________________
1972 C20, 402/700R4 - My first classic truck, bought in September 2005. 85% transformed from "Farm" to "Cool" status!  1970 Dodge Challenger 440, 4sp (my other toy) 12.67 @ 117 MPH, with a pathetic 2.022 60' 2007 Dodge Charger SRT-8 2008 Cadillac CTS All-American garage, baby! Last edited by MrC1; 02-08-2006 at 11:37 AM. |
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02-08-2006, 02:45 PM
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#5 |
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Registered User
Join Date: Jan 2006
Location: Houston
Posts: 434
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Re: BB Heater Hoses
So what is the routing from factory, to water pump or to radiator?
MrC1, I like your explanation for the design if in fact the factory routed it to the radiator. |
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02-09-2006, 04:45 PM
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#6 |
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Thats the Hillbilly way
Join Date: Jul 2001
Location: Torrance,Ca
Posts: 5,980
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Re: BB Heater Hoses
On BB which is a 72 there is a bracket that helps keep the hose away from the compressor .
__________________
BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen , |
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02-10-2006, 12:16 AM
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#7 | |
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Living In The Past
Join Date: Nov 2003
Location: Rockies
Posts: 709
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Re: BB Heater Hoses
Quote:
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02-10-2006, 11:01 AM
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#8 | |
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Dork For Days
Join Date: Aug 2005
Location: Dallas
Posts: 407
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Re: BB Heater Hoses
Quote:
__________________
1972 C20, 402/700R4 - My first classic truck, bought in September 2005. 85% transformed from "Farm" to "Cool" status! 1970 Dodge Challenger 440, 4sp (my other toy) 12.67 @ 117 MPH, with a pathetic 2.022 60' 2007 Dodge Charger SRT-8 2008 Cadillac CTS All-American garage, baby! |
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02-11-2006, 08:57 AM
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#9 |
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Registered User
Join Date: Jan 2006
Location: Houston
Posts: 434
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Re: BB Heater Hoses
Made an executive decision and routed to the water pump.
As for the bracket, I thought there should be one, but I can't find the bolt hole in the inner fender. |
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02-11-2006, 03:11 PM
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#10 |
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Senior Member
Join Date: Jul 2004
Location: Sweden
Posts: 833
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Re: BB Heater Hoses
Here are some pics taken from Chevrolet 10-30 Series Truck Service Manual showing routing and clamping.
Looks like auto trans. trucks should have a clamp at the bottom of the battery tray. First pic shows big block auto.
__________________
Mats.. ---------------------------------------------------- 1971 Cheyenne Super Custom Camper 475CBB/TH400/AC 1992 Silverado Sport Truck 1988 Silverado 2500 Ext Longbed 4x4 2001 GMC Sierra SLT 4x4 1990 Chevrolet K3500 1965 Pontiac Grand Prix 1980 Z 28 350/4-speed/AC/T-top 1980 Camaro Coupe V6/3-speed 1979 Buick Century Wagon |
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02-11-2006, 03:13 PM
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#11 |
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Senior Member
Join Date: Jul 2004
Location: Sweden
Posts: 833
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Re: BB Heater Hoses
BB manual.
__________________
Mats.. ---------------------------------------------------- 1971 Cheyenne Super Custom Camper 475CBB/TH400/AC 1992 Silverado Sport Truck 1988 Silverado 2500 Ext Longbed 4x4 2001 GMC Sierra SLT 4x4 1990 Chevrolet K3500 1965 Pontiac Grand Prix 1980 Z 28 350/4-speed/AC/T-top 1980 Camaro Coupe V6/3-speed 1979 Buick Century Wagon |
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02-11-2006, 03:14 PM
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#12 |
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Senior Member
Join Date: Jul 2004
Location: Sweden
Posts: 833
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Re: BB Heater Hoses
SB auto.
__________________
Mats.. ---------------------------------------------------- 1971 Cheyenne Super Custom Camper 475CBB/TH400/AC 1992 Silverado Sport Truck 1988 Silverado 2500 Ext Longbed 4x4 2001 GMC Sierra SLT 4x4 1990 Chevrolet K3500 1965 Pontiac Grand Prix 1980 Z 28 350/4-speed/AC/T-top 1980 Camaro Coupe V6/3-speed 1979 Buick Century Wagon |
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02-11-2006, 03:15 PM
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#13 |
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Senior Member
Join Date: Jul 2004
Location: Sweden
Posts: 833
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Re: BB Heater Hoses
SB manual.
__________________
Mats.. ---------------------------------------------------- 1971 Cheyenne Super Custom Camper 475CBB/TH400/AC 1992 Silverado Sport Truck 1988 Silverado 2500 Ext Longbed 4x4 2001 GMC Sierra SLT 4x4 1990 Chevrolet K3500 1965 Pontiac Grand Prix 1980 Z 28 350/4-speed/AC/T-top 1980 Camaro Coupe V6/3-speed 1979 Buick Century Wagon |
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02-11-2006, 10:56 PM
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#14 |
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Registered User
Join Date: Jan 2006
Location: Houston
Posts: 434
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Re: BB Heater Hoses
Thanks! But I have that Service Manual and those pictures are not in it. I have the Chevrolet Truck Chassis Service Manual Series 10-30. Is there a different Service Manual?
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02-12-2006, 03:56 AM
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#15 |
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Senior Member
Join Date: Jul 2004
Location: Sweden
Posts: 833
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Re: BB Heater Hoses
This is the one I have.
The information I posted was found in section 1A.
__________________
Mats.. ---------------------------------------------------- 1971 Cheyenne Super Custom Camper 475CBB/TH400/AC 1992 Silverado Sport Truck 1988 Silverado 2500 Ext Longbed 4x4 2001 GMC Sierra SLT 4x4 1990 Chevrolet K3500 1965 Pontiac Grand Prix 1980 Z 28 350/4-speed/AC/T-top 1980 Camaro Coupe V6/3-speed 1979 Buick Century Wagon |
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02-12-2006, 09:28 AM
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#16 |
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Registered User
Join Date: Jan 2006
Location: Houston
Posts: 434
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Re: BB Heater Hoses
O.K. The one I have is for a 71. Mine is green and greay where yours is red and yellow.
By the way, great pictures. |
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02-13-2006, 12:26 AM
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#17 |
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Registered User
Join Date: Jan 2006
Location: Houston
Posts: 434
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Re: BB Heater Hoses
REversed my executive decision today. Put the hose back on the radiator and replugged the water pump.
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