88 yj 4.2. Starts to run warm at idle. If I bump the rpm’s it cools right back down. Temp is perfect when driving. I don’t have a fan shroud which I suspect could be the problem. Basically my question is, does a fan shroud really make that big of a difference?
Yj gets hot at idle
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the fan shroud makes a lot of difference in the efficiency of the fan, especially when not moving.
have you recently removed the shroud and the problem just started, or is there no relation to the timing of this problem and the removal of the shroud?
it could also be the fan clutch
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Also check your coolant level. How old is your water pump?
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It’s never had a shroud since I’ve owned it and the problem has always been there. No idea how old water pump is but I’m in the middle of rebuilding a 4.0 for it so I’m not gonna spend any money on it if I don’t absolutely have to. But a fan shroud is something I need either way. I’m gonna go ahead and order one
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