Originally Posted by
joshua43214
It is possible but unusual to leak air in but not coolant out. Normaly this is caused by a loose hose clamp. The rubber swells enough when warm to seal, then as it cools down, in shrinks and allows air to be drawn in. Normaly it will have signs of seeping arround the clamp. look for crusting and the like arround the hose ends and other coolant seals, like the T-stat cover. I have found that it is good maintainance practice to retorque all the hose clamps at every oil service. Just use a swivel socket and loseen every clamp under the hood 1/4 turn and then tighten it back up a bit. Do this with the hoses hot, and don't over tighten the clamps, they take very little force to clamp properly.
While you are rooting about under the hood, verify that the radiator is clean of leaves and other obstructions, tip it forward if you can to look between the radiator and the condensor, alot of buggy temp problems are caused by debris.
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