DIY Guides › Overheating
Highway overheating can point to restricted flow, radiator issues, or airflow blockage.
When to use this guide: It runs fine in town but climbs at speed.
Fine at idle, overheats at speed, that means coolant isn't moving fast enough under load. Squeeze the lower radiator hose while it's warm. If it collapses when you rev the engine, there's your problem. If the hose is fine, check whether the radiator is plugged internally or the water pump is slipping. All three have quick checks you can do in the driveway.
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