19963.4lsr5
New member
Try blowing air through the hose into the overflow cap. Make sure it is clear.
And make sure the nipple at the rad cap is not plugged with junk.
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collapsing top hose
- Thread starter 3bears
- Start date
Try blowing air through the hose into the overflow cap. Make sure it is clear.
And make sure the nipple at the rad cap is not plugged with junk.
Sent from my iPhone using Tapatalk
I would do what 19963.4lsr5 mentioned above.
Also, it might be time for a new hose as it's unknown how long it's been doing the vac condition and may have weakened it's internal structure.
With the cap off, is it easy/flimsy to pinch the hose? You can try comparing the feel compared to the lower hose or, on a new hose at the auto parts store.
Don't rule out a bad aftermarket radiator. I ran a radiator and cap from Orielly, I was in a pinch and needed the engine running asap. I had issues with coolant not returning to rad. Putting the old cap back on didn't fix it. Only a new Denso radiator fixed it.
Also, it might be time for a new hose as it's unknown how long it's been doing the vac condition and may have weakened it's internal structure.
With the cap off, is it easy/flimsy to pinch the hose? You can try comparing the feel compared to the lower hose or, on a new hose at the auto parts store.
Don't rule out a bad aftermarket radiator. I ran a radiator and cap from Orielly, I was in a pinch and needed the engine running asap. I had issues with coolant not returning to rad. Putting the old cap back on didn't fix it. Only a new Denso radiator fixed it.
yep, both of those hoses are new and nipple not plugged. new "toyota" hose on order should be here anyday
LittleCaesar
New member
If the 4Runner was badly neglected and being in Alaska the hose may just be worn out. How is the heat in the 4Runner? I have seen an upper hose collapsed due to a semi faulty thermostat.
19963.4lsr5
New member
Unless that upper hose is shot and weak.....it’s worth a shot replacing the hose to the tank.
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the new upper hose came in and is now installed, so we will see after it runs and cools tomorrow.. I replaced the hose to the tank and the hose in the tank weeks ago, as when I got it the in tank hose was a piece of fuel line and a hose clamp, which would not allow the cap to fit correctly on the overflow, so the cap was electrical taped on....it was pretty neglected and full of half ass repairs.
It is not necessary to have the over flow tank cap to fit snug. Just make sure the bottom of the hose inside the over flow tank is in coolant.
My Land Cruiser has a higher PSI rating on the radiator cap and it is OEM. Just to keep coolant form boiling and to reach high temperatures.
My Land Cruiser has a higher PSI rating on the radiator cap and it is OEM. Just to keep coolant form boiling and to reach high temperatures.
true, but having electrical tape holding it on just really bugged me, plus the only way to add fluid would have been to cut off the electrical tape, I know they dont have to fit tight as they are not under pressure.
Maybe the 3 psi difference on the rad cap does not make much of a difference, but I was trying everything to get it right.
thanks
well new top hose is not sucking in as much as the old aftermarket one was. So maybe its just newer and firmer. or maybe it is solved....i will just keep my eye on it . New timing belt, pump, thermostat and radiator will be this summer.
so to rehash....replace top hose, steeler rad cap, hose from rad to overflow, hose in overflow, made sure all nipples were clear ( no plugs)
thanks to everyone for your help
so to rehash....replace top hose, steeler rad cap, hose from rad to overflow, hose in overflow, made sure all nipples were clear ( no plugs)
thanks to everyone for your help
kind of an update....sold the one having the issue. For 3 months the hose kept collapsing and I started to notice water loss, not much, maybe every 2 or 3 tanks of gas put in about an inch into overflow tank.
when I sold it, the guy who bought it took it to a shop for another issue ( that one had issues) and they found a leaking freeze plug
guess that would explain the water loss but maybe also the pressure change in engine thus collapsing the upper hose
when I sold it, the guy who bought it took it to a shop for another issue ( that one had issues) and they found a leaking freeze plug
guess that would explain the water loss but maybe also the pressure change in engine thus collapsing the upper hose
