02-25-2021, 07:24 PM
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#1
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Upper radiator hose leak
My upper radiator hose has a minimal leak that's leaving a crust of coolant on the timing belt cover. It looks like it was recently replaced and whoever did it used a cheap worm gear hose clamp. Interestingly enough my Corolla leaks in the same place, same style of clamp, no matter how much I tighten it. Do the constant tension clamps do that much of a better job?
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1997 SR5, 3.4L, Manual
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02-25-2021, 08:05 PM
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#2
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Quote:
Originally Posted by texadelphia
My upper radiator hose has a minimal leak that's leaving a crust of coolant on the timing belt cover. It looks like it was recently replaced and whoever did it used a cheap worm gear hose clamp. Interestingly enough my Corolla leaks in the same place, same style of clamp, no matter how much I tighten it. Do the constant tension clamps do that much of a better job?
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The benefit of constant tension clamps is that as the hose compresses over time they maintain their clamping force without needing to be tightened more. I'd see if you can tighten the clamp any to deal with the leak. Otherwise I'd guess that the connection may not have been cleaned off before the hose was replaced.
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02-25-2021, 09:30 PM
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#3
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It's pretty common that the water necks get pitted over time from corrosion. I'd pull off the hose and get a good luck at what you're dealing with. And yes, constant tension clamps are superior to the screw down clamps for the reason
@ Skulking
mentioned above.
I bet you could remove the hose, take some emery cloth to the neck to smooth it out and then put it back on. Go to Toyota and buy some constant tension clamps and get rid of the screw down clamps.
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Last edited by mtbtim; 02-25-2021 at 09:33 PM.
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02-25-2021, 09:31 PM
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#4
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The best clamp will only be a band aid. Buy a new hose and take a wire brush to the aluminum neck that the hose goes onto because it is corroded. Then you can get some nice Breeze or Mishimoto constant tension clamps. OEM clamps are also cheap and more than adequate.
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02-25-2021, 09:34 PM
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#5
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Quote:
Originally Posted by Skulking
The benefit of constant tension clamps is that as the hose compresses over time they maintain their clamping force without needing to be tightened more. I'd see if you can tighten the clamp any to deal with the leak. Otherwise I'd guess that the connection may not have been cleaned off before the hose was replaced.
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02-26-2021, 01:41 AM
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#6
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Thanks all. I'll clean up the water neck and get some spring clamps for both cars.
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02-26-2021, 10:51 AM
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#7
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The neck on my lower hose had actually pitted all the way through.
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Rebuilt Engine, Doug Thorley Headers, Gibson Catback
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02-26-2021, 11:24 AM
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#8
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My upper neck was so pitted it needed replaced. Thankfully I had a spare, I only noticed it putting the rebuilt engine together.
I bead blasted both upper and lower necks at work.
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02-26-2021, 09:26 PM
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#9
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so I uderstand you all like the constant pressure spring type thingy hose clamps. Being an old fart, the screw type is what I used most of the years.
I also dislike the local dealer ( only one for over 300 miles) and as I am about to order a bunch of stuff from aryama ( McGeorge and camelback charge a ton to ship here). ANyone have part numbers handy for the upper and lower radiator hose clamp thingys.
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02-26-2021, 09:33 PM
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#10
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so I uderstand you all like the constant pressure spring type thingy hose clamps. Being an old fart, the screw type is what I used most of the years.
I also dislike the local dealer ( only one for over 300 miles) and as I am about to order a bunch of stuff from aryama ( McGeorge and camelback charge a ton to ship here). ANyone have part numbers handy for the upper and lower radiator hose clamp thingys.
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2000 SR-5 Highlander version 4:30's, factory locker , green, bought 6/21
2001 SR-5... bought 11/20..sold 6/21....
2000 SR-5 moded, lifted, e locker, other cool stuff, totaled 10/20
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02-26-2021, 09:36 PM
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#11
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Quote:
Originally Posted by 3bears
so I uderstand you all like the constant pressure spring type thingy hose clamps. Being an old fart, the screw type is what I used most of the years.
I also dislike the local dealer ( only one for over 300 miles) and as I am about to order a bunch of stuff from aryama ( McGeorge and camelback charge a ton to ship here). ANyone have part numbers handy for the upper and lower radiator hose clamp thingys.
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Genuine Toyota Radiator Hose Clamp, OEM Spring Style 90467-37005
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