Tips on solving Electroysis in Cooling System - JeepForum.com
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post #1 of 9 Old 04-23-2019, 04:11 AM Thread Starter
Kiwi_TJ
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Tips on solving Electroysis in Cooling System

Hi There,

I have just replaced my radiator, and the guy that looked at my old one said that it corroded out due to electrolysis in the cooling system. Sure enough, I put the new radiator on and put the ground of the multimeter on the battery negative and the positive probe in the water, and got 0.5 volt, even with the Jeep not running, similar with it running.

Any ideas where to look to start fault finding this?


1997 TJ Soft Top/ Half Doors
4.0 I6 with 5 Speed Manual | K&N Panel Filter | D30/D44 | 3.07 Gears | Banks Torque Tube Header
31*10.5 R15 Maxxis Trepador Radial Tyres | 2" BDS Spring Lift | Bilstein 5100 Shocks | JKS Discos | JKS Rear Swaybar Links | 100W Narva Spotlights
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post #2 of 9 Old 04-23-2019, 08:24 AM
dbbd1
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Couldn't you just run a ground wire to the radiator?
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post #3 of 9 Old 04-23-2019, 09:16 AM
Que89YJ
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You will always have potential in cooling. Water running through a block picks up metal and will leave potential there. If you run demineralized water it would only be short term. Grounding the rad would leave it a path and still allow current to flow. If you maintain the cooling system and flush it every 60k or so it will last longer then the Jeep. Maintenance is the key.
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post #4 of 9 Old 04-23-2019, 09:24 AM
pwmac
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Easy to solve the issue by changing the coolant on a regular basis. The coolant has the ingredients to prevent corrosion.
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post #5 of 9 Old 04-23-2019, 01:49 PM Thread Starter
Kiwi_TJ
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I already have a ground wire directly to the radiator core, that did not help.

I flushed the cooling system and put new coolant, water pump and Mishimoto radiator in one year ago. That radiator corroded out, so trying to stop that happening again. So this does not line up with the advice that new coolant will solve the issue.

Any other ideas?

1997 TJ Soft Top/ Half Doors
4.0 I6 with 5 Speed Manual | K&N Panel Filter | D30/D44 | 3.07 Gears | Banks Torque Tube Header
31*10.5 R15 Maxxis Trepador Radial Tyres | 2" BDS Spring Lift | Bilstein 5100 Shocks | JKS Discos | JKS Rear Swaybar Links | 100W Narva Spotlights
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post #6 of 9 Old 04-23-2019, 02:20 PM
jjandascog
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Is there a material difference between the Mishimoto radiator and stock? I know the tanks on the stock are plastic and the mounting flanges seem to be steel as opposed to AL of the Mishimoto one. I would guess the Mishimoto is also made from cheap quality AL. Put all that together and the fact that the Mishimoto is all AL (and again probably cheaper quality than the stock one), the radiator itself could be the problem.

I assume the mechanic that told you your previous radiator dies of electrolysis knows what that looks like with AL, it will leave a white powder as the AL is sacrificed.

2004 Jeep TJ Sport, 4.0, Auto, 3.5 SL, 1.25" BL, BFG's cool mud jack across the hood
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post #7 of 9 Old 04-23-2019, 02:27 PM
Que89YJ
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Aluminum rads don't corrode the same way coppers do. All radiator systems do corrode though. Maintain them and you won't have issues. Cast block and heads, copper core, electricity flowing all over the vehicle, corrosion happens.

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post #8 of 9 Old 04-23-2019, 09:57 PM
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Can you put some sacrificial anodes in the tank? Change them every month. Zinc would probably be best, it will attract the doodoo.

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post #9 of 9 Old 04-23-2019, 10:47 PM
TheBoogieman
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Use a oem Mopar radiator, flush system thoroughly, add proper coolant and don't worry about it. Mine has over 150,000 miles on it and no problems.

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