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Old July 26th, 2009, 14:44
kcclark kcclark is offline
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How to convert closed system to open system?

I have an 86 xj with a closed system radiator I have an open radiator what is the best way to convert the system
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Old July 26th, 2009, 15:43
Slip Kid Slip Kid is offline
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Re: How to convert closed system to open system?

All I did was replace the radiator and get a heater control valve from an open system. All I had to do was make all the hoses fit.
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Old July 26th, 2009, 15:56
lawsoncl lawsoncl is offline
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Re: How to convert closed system to open system?

If you've got a radiator with a cap on it, just eliminate the plastic surge tank by plumbing directly to the heater core. You can either ditch the heater control valve or replace it. There is a neglible difference without the valve and it'll help keep the heater core from plugging up as bad. You'll need some sort of overflow bottle.
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Old July 26th, 2009, 16:37
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winterbeater winterbeater is offline
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Re: How to convert closed system to open system?

Don't need heater control valve. Run heater core direct and add a standard overfow bottle. For cheap, you could even adapt in an old antifreeze bottle.
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