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#1 |
Registered User
Join Date: Apr 2019
Location: SC
Posts: 74
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Help with LS swap radiator hose
Trying to see if anyone can help me with the radiator hoses for my 67 C10 with 6.0 motor LS swap.
I’m running an Entropy radiator, With the passenger side outlets and according to them I needed a lower hose off a Silverado and an upper off a Mitsubishi. In short, that’s a FAIL. It’s not even close. I don’t even know where to begin to try to figure it out. Any help is appreciated. |
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#2 |
Registered User
Join Date: Nov 2012
Location: 9
Posts: 862
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Re: Help with LS swap radiator hose
I cant speak for certain on the top, but I know on the bottom you have to cut it to fit. Did you cut it to only use the part needed?
I would assume the same appies to the top one as well. |
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#3 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,652
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Re: Help with LS swap radiator hose
on my 81 I made wire templates from tig rod ...carried those to the parts store to help match up what I needed... had to shorten top hose...bottom hose is 2 pieces..
doubtful there will be a hose that fits perfect with no mods
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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#4 |
Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,052
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Re: Help with LS swap radiator hose
I used 1996 jeep grand cherokee 4.0 upper and lower hoses trim a little of the ends and perfect fit. I used a rnd rad bit outlets should be the same size
__________________
1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
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#5 |
Registered User
Join Date: Apr 2019
Location: SC
Posts: 74
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Re: Help with LS swap radiator hose
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#6 | |
Registered User
![]() Join Date: Jun 2014
Location: Shingle Springs, CA
Posts: 869
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Re: Help with LS swap radiator hose
Quote:
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#7 |
Registered User
Join Date: Apr 2019
Location: SC
Posts: 74
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Re: Help with LS swap radiator hose
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#8 |
Almost Satisfied
![]() Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Re: Help with LS swap radiator hose
Here is what I used with my 6.0 and Entropy.
Upper Gates 21439 Lower Gates 20687 Had to cut the lower, but they both fit great. You can look at my build thread to see them
__________________
1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
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#9 |
Registered User
Join Date: Apr 2019
Location: SC
Posts: 74
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Re: Help with LS swap radiator hose
Thanks so much....I ordered today. Another question-are you using the top port above the upper hose outlet for your steam vent?
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#10 | |
Almost Satisfied
![]() Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Re: Help with LS swap radiator hose
Quote:
__________________
1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
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#11 | |
Registered User
Join Date: Apr 2019
Location: SC
Posts: 74
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Re: Help with LS swap radiator hose
Quote:
Where did you get the clamp? Is it off a late model Silverado? |
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#12 |
Almost Satisfied
![]() Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Re: Help with LS swap radiator hose
My motor came out of a Yukon Denali, so not sure if the Silverado has the same clamp or not.
__________________
1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
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#13 |
Registered User
Join Date: Aug 2004
Location: Sacramento Ca
Posts: 126
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Re: Help with LS swap radiator hose
I found this thread and I have the Cold-Case LS swap radiator.
GMT558ALS which has a 1.5" in and out. To get the Gates hoses to fit I bought an adapter. ICT Billet 1-1/4" to 1-1/2" Inch Hose Barb Splice Coupler Not sure why Cold-Case puts an 1.5 inch upper, when the LS engine is 1.25, so now I'm adding a reducer aka adapter, to the hose. ![]() I down loaded the Gates catalog and Gates Radiator Hose - 20801 might be an alterative, but I have not held that hose in my hands. But it is 1.5 to 1.25 I have the two gates hoses mention above. |
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