Heater Hose Fitting thread size on Edelbrock # 2101 intake - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ECU PIRATE · 01-26-2011, 08:15 AM

Any of you guys running and Edelbrock 2101 instake manifold and what is the thread size of heater hose fitting you are using? 5/8" or 3/4". Just another thing that was not on the truck when I bought. Can I use the same thread size of water pump as well? Excuse what might see like stupid questions but, it has been a long time since I even had to think about these issues

BLE 'BURBAN · 01-26-2011, 11:59 AM

Generally the heater flow is from the intake to the heater then back to either the radiator OR the water pump. The inlet hose to the heater is 5/8" hose and the outlet from the heater is 3/4" hose. Thusly the hose nipple on the intake would be 5/8" and on the water pump is 3/4".

ECU PIRATE · 01-26-2011, 12:37 PM

Quote:

Originally Posted by BLE 'BURBAN

Generally the heater flow is from the intake to the heater then back to either the radiator OR the water pump. The inlet hose to the heater is 5/8" hose and the outlet from the heater is 3/4" hose. Thusly the hose nipple on the intake would be 5/8" and on the water pump is 3/4".

Thanks Bud. I need to add that to my wish list @ Classic Parts. I should just go to the pick and pull and pirate them but, some things you just have to by new.........

dbmx66 · 01-26-2011, 01:28 PM

they generally use 1/2 NPT which its close to a .75 hole, but its a tapered tap. i know when i still had my heater, the fitting on the intake and on the water pump were both 1/2NPT but the bungs were 3/4 and the other was 5/8

01-26-2011, 08:15 AM	#1
ECU PIRATE Registered User Join Date: Apr 2009 Location: Centreville, Virginia Posts: 846	Heater Hose Fitting thread size on Edelbrock # 2101 intake Any of you guys running and Edelbrock 2101 instake manifold and what is the thread size of heater hose fitting you are using? 5/8" or 3/4". Just another thing that was not on the truck when I bought. Can I use the same thread size of water pump as well? Excuse what might see like stupid questions but, it has been a long time since I even had to think about these issues Attached Images __________________ The Fleet........ 68' Camaro - 1st car (restored & still have it) 09' VW Tiguan (Wife's Daily Driver) 14' VW Passat SE TSI (my personal) 14' Ford Edge Sport (Daily Work Vehicle) 73' SWB Stepside - 77K org. miles 74' LWB 454/TH400 - drive train transplant for my (Sold) 98' SWB C1500 W/T - shop truck (Sold) 90' GMC Sierra SLE short step - aka " Jezabelle " (Sold)

01-26-2011, 11:59 AM	#2
BLE 'BURBAN In the Forgotten far North. Join Date: Jul 2007 Location: Anchorage, Alaska Posts: 2,627	Re: Heater Hose Fitting thread size on Edelbrock # 2101 intake Generally the heater flow is from the intake to the heater then back to either the radiator OR the water pump. The inlet hose to the heater is 5/8" hose and the outlet from the heater is 3/4" hose. Thusly the hose nipple on the intake would be 5/8" and on the water pump is 3/4". __________________ 1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade

01-26-2011, 01:28 PM	#4
dbmx66 Registered User Join Date: Aug 2009 Location: PA Posts: 883	Re: Heater Hose Fitting thread size on Edelbrock # 2101 intake they generally use 1/2 NPT which its close to a .75 hole, but its a tapered tap. i know when i still had my heater, the fitting on the intake and on the water pump were both 1/2NPT but the bungs were 3/4 and the other was 5/8



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