It depends on how severe the coolant leak is. A very minor, slow leak with the coolant level still adequate may allow careful short-distance driving while closely monitoring the temperature gauge. Still, a significant leak or a Jeep that's already showing a rising temperature should not be driven until it's repaired.

The safest way to think about this is in terms of how much protection you have left. Coolant does two jobs at once: it carries heat away from the engine, and it prevents that heat from ever building up to a damaging level in the first place. A small leak, like a light drip from an aging hose clamp, might be losing fluid slowly enough that a short trip to a repair shop is low-risk, provided you keep an eye on the temperature gauge the entire time and are ready to pull over if it climbs.

A larger leak is a different situation entirely. If you can see a growing puddle under your Jeep, if the coolant reservoir is dropping visibly between short drives, or if the temperature gauge has already crept toward the hot side, continuing to drive risks the engine running dry of coolant while you're on the road. Once that happens, overheating can occur within minutes, and the resulting damage, such as a warped cylinder head or a blown head gasket, costs far more to fix than the original leak would have.

If you're not sure how serious your leak is, a reasonable rule of thumb is to check your coolant reservoir when the engine is cold. If the level has dropped noticeably since the last time you checked, or if you smell that sweet coolant odor inside or outside the cabin, treat it as more than a minor leak. Ann Arbor's stop-and-go traffic patterns also mean that a marginal leak that seems fine on the highway can cause overheating faster while idling.

If you're seeing coolant on the ground or your temperature gauge is behaving unusually, it's worth having your Jeep looked at before you put more miles on it. Hoover Street Auto Repair in Ann Arbor can quickly tell you whether it's safe to keep driving or if it needs to come off the road first.