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G1000 radiator cap

M

minniemo705

Member
Still having a problem with this thing spitting out through the overflow. It's got a 9# cap on it which is what it had when I got it. Is that what it needs or or does it need a
heavier or lighter # cap or does it just need to find its level and stay with the 9#? The level just seems to be to low in the radiator compared to any other pressurized system.
Thanks
 
Make sure you aren't getting some pressure building up in the cooling system from something like a head gasket leaking compression in to the coolant or worse yet a cracked head. Those will usually push out coolant over the top if you leave the cap off and run it. If it's just some coming out the overflow hose, those always seem to have a hard time keeping them full, (over the baffle plate)at least that was always the case on our Vistas. If you worked them hard on a hot day and then idled them down too fast some would always dribble out if you have them full. They should have had some type of overflow tank like the newer ones do.
 
that is exactly what it is doing. It's not bubbling out with the cap off, just doesn't stay above that baffle and just spits out till it finds a certain level. This is my first G1000, I'm used to my 705 and GVI, so I'll just leave it alone. Thanks
 
that sounds the same as the Lincoln welders minniemo, the have no expansion tank and if you fill them full they will barf out what they don't want and find a level that they want to run at. I will often put a I quart pop bottle at the end of the hose to act as an expansion tank.
 
yes, I put the overflow hose about 2 inches into the bottle. up here we have 2 lire pop bottles just a little over 2 quarts, and they seem to work fine. the rad will find it's own level and stay there. if you want it to work like an expansion tank put the hose about an inch or two off the bottom of the bottle. it works well on the old Lincoln welders (flat head contintnental gas) and it stops the antifreeze mess all over.
 
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