I'm putting an 180* stat in my '93 ZJ/5.2 and read that you can/should drill a small 1/8" hole to act as a "Jiggler Valve" to prevent air lock? Is this wise? Has anyone done this mod with success? Can it be detrimental?
I live in So. Cal and drive to St. George via Las Vegas once a month. My 5.2L has been running a bit hotter than I prefer-about 205-210* in heavy traffic w/AC off. Recently replaced water pump(leak) & radiator(leak). No head gasket leak. So I'm gonna try the 180* and see if that makes a diff.
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