How Far Can You Drive An Overheating Car? Solved!
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An overheating engine is a serious issue for any vehicle. How far you can drive with an overheating engine?
Table of Contents
- What are the signs of an overheating vehicle?
- How far is safe to drive an overheating vehicle?
- Why isn’t driving an overheating vehicle safe?
- What should I do instead?
- Get a tow truck when your vehicle is overheating
- Do radiator leak fixes work?
- Does an engine shut off when overheating?
- How can I be prepared for an overheating vehicle?
- Key Takeaways
You cannot drive an overheating vehicle for more than a quarter mile without increasing the risk of permanent damage to your engine. Rather than attempting to discover the limit to how far you can go, we suggest not driving the vehicle and having a tow truck help you.
We will discuss in detail the typical causes of an overheating engine, safe driving distances, and when you should let a professional take care of your vehicle.
What are the signs of an overheating vehicle?
In no particular order
- Excessive popping or noise from the engine as your cylinders start to fire too early or too late
- Your engine might start producing smoke and steam
- You’ll have a dashboard light on that is often red or yellow – often with what looks like a thermometer
How far is safe to drive an overheating vehicle?
While we suggested driving a quarter of a mile, the reality is that you should not attempt to drive an overheating vehicle at all.
Engines are designed to operate at specific temperatures, the best range of which is usually right in the middle of the temperature gauge on your dashboard.
These temperatures are chosen because the metal parts within the engine operate the most efficiently – and safely, within certain temperature ranges, and because cooling systems are built to reduce heat to those levels.
In case you were wondering, a ¼ is suggested because the distance is not very far and won’t get the engine much of a chance to build up heat. We also suggest driving the ¼ with a recently started and “cold” engine if you can.
Why isn’t driving an overheating vehicle safe?
Your vehicle has lots of precision-engineered parts moving in sequence to keep you going. Something as seemingly simple as a warped cylinder head from excessive heat can cost you big simply because the parts are hard to get to, labor prices aren’t cheap – and cars repairs are generally expensive.
Another reason to not attempt to drive an overheating vehicle is traffic. Since the engine could develop a serious problem at any moment, you might find yourself stranded in highway traffic. If you must keep going, stick to the side roads.
What should I do instead?
You can do a couple of things to attempt to help your car along, though we suggest you still be very careful about driving too far.
First, check to see if you have any coolant left. The absolutely first thing you’ll want to do is to NOT open the hood of the car while it is on and overheating. Let the vehicle cool down, especially if you see steam.
Wait for as long as you need – the fluid within is both under pressure and hot – not a good combination at all and can cause serious burns. Wait 15 minutes if not longer for any steam to go away.
There should be a reservoir – often gray or white, near the back of your engine with a MAX and MIN line.
These maximum and minimum line is present because coolant expands when heated. If your coolant level is below the minimum line, you do not have enough coolant to keep going safely. The biggest challenge here is that sometimes heat issues within your vehicle’s engine come on suddenly and most people don’t simply carry coolant in a jug in their vehicle.
Should the heat gauge on your vehicle stay in a good range – good! This might be a temporary fix at best, as the coolant that was in your coolant reservoir had to go somewhere and might just leak out again.
Another option is to turn on the heater to attempt to pull heat off the engine, though we can honestly say this is unlikely to help long term – or even for a few miles.
Get a tow truck when your vehicle is overheating
Especially when you have insurance with roadside assistance, you should call a tow truck and get your vehicle towed to a mechanic – or home, depending on how vehicle-savvy you are.
Why? Well, even if you don’t have insurance with roadside assistance, towing often costs you just a couple of hundred dollars. The price to do a major engine repair as the result of overheating damage will likely cost you several hundred, if not thousands of dollars depending on your vehicle.
Do radiator leak fixes work?
These can work temporarily to plug a hole directly in the radiator for the vehicle. You’ll know pretty quickly if the leak is within your radiator, as the engine temperature will begin to rise again.
The leak could be within your hoses, which means these kinds of fluids won’t necessarily help.
Does an engine shut off when overheating?
Not necessarily. At most, your vehicle might warn you that your engine is getting too hot and suggest via your dashboard that you pull over when safe and turn the vehicle off.
The unfortunate reality here is that your vehicle can give many warnings that the engine is overheating, from having steam pour out of the engine, an annoying buzzing or alert in the vehicle, and a dashboard light that indicates overheating.
The engine, however, probably won’t actually “stop” until something physically breaks – in which case the engine has not truly protected itself, so much as made your drive definitely require a mechanic for the next trip.
How can I be prepared for an overheating vehicle?
Bring an emergency kit with you, especially if your vehicle is aging. Find out what kind of coolant you need and get a jug of it, along with a funnel and a flashlight so you can refill your coolant at any hour needed.
Learning the kind of coolant you need can be as simple as looking at the manual, looking online, or just going to an auto parts store.
For older vehicles, I also strongly suggest bringing a quart or two of oil. Oil is the other very important fluid within your engine that it literally cannot live without.
- There isn’t a safe distance to drive an overheating vehicle. While ¼ mile is stated, an overheating vehicle could develop into a more serious engine issue at any time
- When your vehicle is overheating, turn the engine and let the vehicle cool off until there is no longer steam or any heat. This should take about 15 minutes
- Check your fluids, including your coolant reservoir to see if they are above the minimum line. If you have coolant with you, replace some with a funnel.
- If your vehicle doesn’t retain fluid – or if you don’t have any, call a tow truck to get your vehicle taken to a mechanic.