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I replaced my radiator hoses two weeks ago and have had a leak toward the connection with the water pump ever since. The car is a 65 and the engine is a replacement 302. Finding a hose required me walk in the back of O'riley's and try to make the best guess. I don't want to keep cranking down the clamp because it might cut into the hose. Please check out the pictures and notice the bulge in the hose. I could reposition the clamp to be closer to the water pump or buy some stop leak. Anyone ever dealt with anything similar? I tried uploading a video but it would not go through.

Thanks,
Dave
 

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It's probably because you're trying to put a 1-3/4" hose that goes on a 6.8 liter V10 onto a 1-1/2" thermostat housing and radiator.
 

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Definitely wrong size hose.

Sounds like you need to go to an auto parts store with people who know what they are doing to actually help customers...rant over.

Here’s what you need:

 

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And DON'T use stop leak unless it's to get you off the side of the road, and you're gonna flush it and replace components then fix it correctly as soon as you get back to the stable.
 

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And what is the condition of your thermostat housing? Is it corroded? Or clean and smooth?

Rusty
 

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Something definiety does not look right. Wrong size hose, it should be a pretty snug fit when it slides on. I don't understand, you should be able to get the correct Mustang hose that fits on there.

I wonder if the "Autoparts Specialist" keyed 1965 Mustang ,with a 302 engine and nothing came up in the computer. Just have them look up a 1965 Mustang upper 289 hose. Buy a Motorcraft hose if you can get it.

With the worm-drive clamps you only tighten them until you can "just feel" catch your finger nail on the rubber sticking above the little slots in the clamp. I've seem them where the rubber in the slots is coming out like its a Playdoh Fun Factory.
 

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Virginia Classics makes an excellent period correct WP hose kit. Unless your WP's inlet and outlet is too weird, their kit will fit correctly. Also, they have both "band" and "wire" style proper clamps. I just replaced all three hoses this past weekend with a coolant flush and T/S.
 

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My local independent auto parts store ordered up a few different hoses and the best fit was the Dayton branded house if I am correct. Perfect fit. This is on a 63.5 Falcon Sprint, but same sbf and Mustang / Falcon style radiator. Notice how the hose doesn't look like it is being stretched between connections A and B.
744834
744835
 

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Many of the hoses are slight “cut to fit”, I’ve had hoses in past where I cut more than 1” off.
 

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I replaced my radiator hoses two weeks ago and have had a leak toward the connection with the water pump ever since. The car is a 65 and the engine is a replacement 302. Finding a hose required me walk in the back of O'riley's and try to make the best guess. I don't want to keep cranking down the clamp because it might cut into the hose. Please check out the pictures and notice the bulge in the hose. I could reposition the clamp to be closer to the water pump or buy some stop leak. Anyone ever dealt with anything similar? I tried uploading a video but it would not go through.

Thanks,
Dave
The correct part # is on the hose in the attached photo. C4ZE-8260-A Check your stat housing, if it is all corroded and pitted you need to replace it too.
yarb

hose1.jpg


hose2.jpg
 
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