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Old November 13th, 2017, 21:39
lawsoncl lawsoncl is offline
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Join Date: Jan 2006
Location: North Idaho
Posts: 4,535
Re: Yet another heat issue

It's been quite a while since my 89 had that stupid crumbly plastic vacuum valve. As I recall it was a screwy design that let some coolant bypass the even when it was open. When I converted to the "closed" style used in the later Jeeps and plumbed directly to the heater core, my heat significantly improved. I measured 140*F air from the vent on high in 30-degree weather.
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