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Username Post: Radiator Hoses Using LS3        (Topic#362544)
Posts: 4

Reg: 05-23-20
09-12-20 10:52 AM - Post#2803318    

Hi all. I am getting ready to put an LS3 in my 1958 Apache using a stock aluminum radiator. I am hoping someone has already done this to give me direction on what radiator hoses to use. Thanks.


Site Ambassador
Posts: 14718

Loc: Baltimore, MD
Reg: 11-27-04
09-13-20 11:22 AM - Post#2803387    
    In response to LS3100

If no one has any suggestions I’ll tell you what I did changing my El Camino to TPI and serpentine belt. I measured the water pump, thermostat housing, and radiator inlet/outlet diameters and wrote them down. Then I took coat hangers and bent them to the shape I needed and went to my local parts store and searched for hoses that fit the bill. It took me about an hour to come up with two hoses. One had to be shortened a bit, but worked fine.

Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier

"14th Year" Platinum Supporting Member
Posts: 3238
Loc: So Cal
Reg: 06-07-05
09-15-20 07:43 AM - Post#2803504    
    In response to wagonman100

I did the same procedure on my LS1-Nomad. Same as Wagonman100 describes. If you walk into an auto parts store with that wire mockup and a tape measure, they will typically let you browse thru all of the hoses hanging up. You'll more than likely find one that will work. Sometimes they need to be shortened to work for your application.

57 Nomad -LS1 with C4 suspension
59 Apache Fleetside Shortbed BigWindow

Ray P W 
Posts: 524

Reg: 09-30-15
09-15-20 03:53 PM - Post#2803534    
    In response to WagonCrazy


I did what WagonCrazy suggests when I built my sbc powered '32 Ford roadster. A local OReilly welcomed to look on their shelves at all the radiator hoses they stock and I found 2 that could be shortened for a perfect fit.

I recently read in The Tappet Brothers (Click & Clack) syndicated column that radiator hoses made these days are incredibly durable and are pretty much lifetime products. They advise pinching them occasionally to verify that the rubber is still flexible. Maybe that durability is required to tolerate the high temperatures modern cars run at for emission reasons.

Ray W

Posts: 4

Reg: 05-23-20
09-17-20 02:36 PM - Post#2803675    
    In response to Ray P W

Thanks guys this helps. I know I’m new to the site but I think we need an LS Swap Section unless I didn’t see it.

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Posts: 3321
Age: 68
Reg: 11-24-02
09-18-20 05:33 AM - Post#2803724    
    In response to LS3100

Maybe replace the Chevrolet in Racing Forum?

It seems to have gone dead.

'67 Camaro survivor
'06 Z71 Sierra Ex Cab
'37 Chevy cp.SOLD!!6/7/14
'00 S10 Ex Cab
'73 Nova pro-street project
'17 Chevy Trax LT


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