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Radiators coolant flow. Need some help

Posted: 09:14 pm Jun 29 2016
by Ffryno13
So I boiled my motor over on a really tough climb last weekend. So I pressure tested my rads to see if there was a leak and got that fixed it was just a tiny pin hole in the top.

Note I'm thinking i should weld in a cross over from the bottom of my left rad to the bottom of my right.

Sorry I forgot to mention this is on my hybrid so the rads are much bigger then the kdx if that helps.

What I want to know is if having a low cross over will mess with the coolant flow?

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Re: Radiators coolant flow. Need some help

Posted: 03:52 pm Jun 30 2016
by s10gto
I would think if you add a low crossover the water will bypass the radiators. Water is going to go the path of least resistance.

Re: Radiators coolant flow. Need some help

Posted: 03:56 pm Jun 30 2016
by s10gto
My yz250 has crossovers top and bottom but water only enters one radiator.

Re: Radiators coolant flow. Need some help

Posted: 05:11 pm Jun 30 2016
by Ffryno13
s10gto wrote:I would think if you add a low crossover the water will bypass the radiators. Water is going to go the path of least resistance.
That's what I thinking too but once I loose enough coolant then the water pump isn't pushing coolant from the right rad to the left rad. I figure with a cross over then I'll be able to have coolant flow even at half the volume

Re: Radiators coolant flow. Need some help

Posted: 09:02 pm Jun 30 2016
by s10gto
You may need to pick up a radiator comb and straighten the fins out. On a hot technical single track my 220 might see *190. You can also try waterless coolant. It does make a difference.

Re: Radiators coolant flow. Need some help

Posted: 09:08 pm Jun 30 2016
by s10gto

Re: Radiators coolant flow. Need some help

Posted: 10:19 pm Jun 30 2016
by Ffryno13
I've been running water wetter and water with a 1.6bar cap. I'll try and straighten the fins out more. I would have thought running the bigger rmz rads that I'd avoid the over heating issues on the kdx.