Lower radiator mystery hose on 66 coupe

Speedman

New Member
Jul 24, 2018
4
0
1
59
Jacksonville, FL
#1
I've had my 66 coupe for over 20 years. I replaced the radiator hoses months ago and was surprised the other day when I realized the bottom hose somehow came off the radiator and emptied it out all over my garage floor.

Any ideas what might have caused this other than not tightening the clamp enough?

Thanks in advance.
 
  • Sponsors (?)

3154tm

New Member
Dec 13, 2010
3
0
1
pensacola,fl
#4
you've got the clamp as tight as you can reasonably get it, the radiator cap (13 or 16 psi) is not lifting off it's seat and allowing the radiator to vent its contents into the puke tank or on the ground but the hose is "blowing" off?
 

WORTH

15 Year Member
Nov 18, 2002
2,089
25
98
65
Cape Cod, Ma.
68.69.48.22
#5
need more specifics. "I reattached hose and filled coolant and it blew the hose off again. ", is not a good description of your problem. Did you warm up the car with the cap off? Did it get hot? Did it boil water? Did you check that the hose connection is round and in good shape? did you install the clamp between the lip on the goose neck and the tank? What type of clamp are you using? Any action in the top tank while warming up?
 

Realmongo

I prefer to be called "Evil Genius"
Founding Member
Oct 10, 2001
2,215
18
89
Western Mass
#6
By any chance is this another V8 car with the smaller diameter 6-cylinder inlet and outlet radiator?
 

Speedman

New Member
Jul 24, 2018
4
0
1
59
Jacksonville, FL
#7
need more specifics. "I reattached hose and filled coolant and it blew the hose off again. ", is not a good description of your problem. Did you warm up the car with the cap off? Did it get hot? Did it boil water? Did you check that the hose connection is round and in good shape? did you install the clamp between the lip on the goose neck and the tank? What type of clamp are you using? Any action in the top tank while warming up?
need more specifics. "I reattached hose and filled coolant and it blew the hose off again. ", is not a good description of your problem. Did you warm up the car with the cap off? Did it get hot? Did it boil water? Did you check that the hose connection is round and in good shape? did you install the clamp between the lip on the goose neck and the tank? What type of clamp are you using? Any action in the top tank while warming up?
The car was warmed up and had been idling several minutes with the radiator cap on.Temperature gauge is not working so not sure how hot it got but it definitely was not overheating. The clamp is screw down type and was very tight and on the radiator side of the neck/lip. The last thing I did was to warm the car up without the radiator cap on to check the thermostat but the coolant overflowed from the top of the radiator. Without the pressure the hose stayed on.

Any ideas and comments would be appreciated.
 

The Shemdogg

Active Member
Mar 15, 2016
102
17
38
41
san jose CA
#8
Take some 60 grit sandpaper to the inner hose and the rad connection and use 2 clamps. Get a rad cap or tester to see your pressure reading. U might have a jammed thermostat

shem
 

rbohm

SN Certified Technician
Apr 12, 2002
6,475
499
204
60
tucson,az
#10
how easily did the hose go on the nipple it is designed for? if ti went on easily, then the hose is too big, and the pressure generated by the cooling system will blow the hose off.