RnD Fab, LS3, Which radiator hoses? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Guss · 07-28-2015, 10:59 AM

I have spent a couple of hours on here looking for radiator hose recommendations but have had no luck. As in the title, I have a crate LS3 and an RnD Fab radiator. Having lots of trouble finding radiator hoses. I have been going cross-eyed looking through the Gates catalog also. Any help would be GREATLY appreciated.

cooperhw · 07-28-2015, 12:22 PM

Quote:

Originally Posted by Guss

I have spent a couple of hours on here looking for radiator hose recommendations but have had no luck. As in the title, I have a crate LS3 and an RnD Fab radiator. Having lots of trouble finding radiator hoses. I have been going cross-eyed looking through the Gates catalog also. Any help would be GREATLY appreciated.

What I did when I installed my LS-2 in my Chevelle was measure each opening and make a little sketch. Then I used a soft brazing rod and bent them to the correct angles. Once I got my angles correct I went down to the local parts store and asked if I could look through the hoses. Took about an hour to get two that were close and brought one back for a longer one if I remember.
JMO

68shortfleet · 07-28-2015, 07:09 PM

I am using an aluminum radiator with stock location and size inlet/outlets with my LS1, so my info may not be relevant to your swap.

A Gates 20931 lower hose fits extremely well for my engine placement.

**special-K** · 07-29-2015, 09:44 PM

Did you look in the LS swap forum. That's your best bet.

Aruba1 · 07-30-2015, 12:05 PM

I have an LS engine and a stock C20 radiator. For the upper hose I used the stock 2000 Tahoe radiator. I had to apply for some heat to the radiator opening portion as it's wider then the stock tahoe radiator but it worked fine. For the lower radiator hose I went to a local old-fashioned NAPA store and they let me look through all their hoses. I ended up purchasing 3 different hoses and then returned two hoses at a later date. It all worked fine. As long as your RnD radiator has the same diameter ends and same build as a stock radiator, you should be able to use the stock hoses.

07-28-2015, 10:59 AM	#1
Guss Registered User Join Date: Sep 2014 Location: Granite Bay, CA Posts: 11	RnD Fab, LS3, Which radiator hoses? I have spent a couple of hours on here looking for radiator hose recommendations but have had no luck. As in the title, I have a crate LS3 and an RnD Fab radiator. Having lots of trouble finding radiator hoses. I have been going cross-eyed looking through the Gates catalog also. Any help would be GREATLY appreciated.

07-28-2015, 07:09 PM	#3
68shortfleet Registered User Join Date: Oct 2006 Location: Dundee, Oregon Posts: 311	Re: RnD Fab, LS3, Which radiator hoses? I am using an aluminum radiator with stock location and size inlet/outlets with my LS1, so my info may not be relevant to your swap. A Gates 20931 lower hose fits extremely well for my engine placement.

07-29-2015, 09:44 PM	#4
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: RnD Fab, LS3, Which radiator hoses? Did you look in the LS swap forum. That's your best bet. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

07-30-2015, 12:05 PM	#5
Aruba1 Registered User Join Date: Apr 2014 Location: Birmingham, AL Posts: 560	Re: RnD Fab, LS3, Which radiator hoses? I have an LS engine and a stock C20 radiator. For the upper hose I used the stock 2000 Tahoe radiator. I had to apply for some heat to the radiator opening portion as it's wider then the stock tahoe radiator but it worked fine. For the lower radiator hose I went to a local old-fashioned NAPA store and they let me look through all their hoses. I ended up purchasing 3 different hoses and then returned two hoses at a later date. It all worked fine. As long as your RnD radiator has the same diameter ends and same build as a stock radiator, you should be able to use the stock hoses.



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