biggestc69
Member
- 228
- 1
- 18
- Location
- Council Grove KS
I posted this over on M715ZONE to, but as I think its more of a mechanical issure versus type of vehicle issue hopefully you guys can help me get this figured out. My original radiator was shot, so I got the aluminum replacement off Ebay that everybody suggests. Works GREAT! (well the first one did until a week later and it started leaking, company was really cool about it all and I had a new radiator the next day and didnt have to pay for shipping, but thats another story). Well the old motor is down about halfway on compression on most cylinders lowest being 70 on the middle ones and highest being 105 and 100 on the front two. And its a little cold blooded in the morning. So I installed what I did on my CUCV M1008 a Katz brand tank heater that ties into the lower radiator hose and then runs into the inlet for the heater core. Its setup on a timer to start a couple hours before I get up for work. I hate overworking a starter and firing up a cold motor, the deisel especially but I figured what the heck cant hurt on the old worn out Kaiser? Well on really cold days I can go out there and there will be a 2 ft by 4ft wet spot, not a puddle but we spot under the truck. And its always from a hose connection. Its usually never the same hose but its always on the lower cooling, post thermostat side. Now if this had happened 2 or 3 times I wouldnt bother you guys with it, but its everytime it gets down into the single digits. The heater has a thermostat in it to shut off at a certain temp so even plugged in once it heats the water to a certain point it shuts itself off. It finds a new spot to start leaking. Now I'm gonna say what I think might be causing it and you guys can feel free to bash me with it if my thinking is off here. Its got a 13lb cap, the orginal was 15 for the stock radiator, to my understanding. Now this tank heater heats and circulates the water till it gets the lower end warm enough to open the thermostat which is a 180 degree, and then it releaves the pressure. But up until that point that tank heater is just heating water and building pressure on the lower side, maybe more so than the stock system was designed for. And it always leak on the low side, until the pressure gets past a hose clamp or is realeased by the thermostat. Thats what I've come up with, so go easy on me if I'm way off here. The next cap down is a 7lb which might run into a boiling issue. Maybe thats what I have to run in the winter and go to the 13lb in the summer months. Just throwing idea's out there. By the way, all new hoses, hose clamps and they arent over torqued or anything like that. And it likes to do it at that one larger hose on the passenger side block, the fun one to get to kinda behind the fuel pump. I thought about taking the radiator cap loose and running it cold and seeing if it still leaks, thought being it would releave the pressure through the cap, but then again if it really warms it up and it expands then its just gonna overflow outta the cap. Any help at all is appreciated and thanks for taking the time guys!
Cameron
Cameron