Do you see steam coming from your car bonnet?
That’s your engine overheating due to a malfunctioning radiator.
You need to call your mechanic for a replacement ASAP!
Wondering how they’ll replace a car radiator?
And how much it’ll cost?
We’ll list out the steps of a radiator replacement to give you an idea of how it’s done. We’ll also share the costs a professional will charge for this job and some tips to reduce your car care expenses.
Let’s begin!
This Article Contains:
- When Should You Replace Your Car Radiator?
- How to Replace Car Radiators: A General Know-How
- How Much Does a Radiator Replacement Cost?
- 4 FAQs on Car Radiators
When Should You Replace Your Car Radiator?
Radiators can last 5 to 10 years, but accidents and weather can break them sooner. So, you should call for a radiator repair service when you notice the warning signs.
Here are some symptoms you shouldn’t miss:
- Rust formation: Rust weakens the metal and creates tiny holes in your radiator. Through these holes, the engine coolant starts leaking. A radiator with holes and a coolant leak calls for a replacement.
- Steam emitting from the hood: If you see steam coming out from the car’s hood, it’s a sign of a radiator problem. You should stop driving immediately and call a mechanic.
- Weird noises coming from the engine: When there’s a radiator leak, the coolant evaporates and leaves a residue on other engine parts. This sticky residue makes metal parts of the engine grind, creating weird noises.
Now you know the symptoms of a bad radiator, let’s see how a pro replaces it.
How to Replace Car Radiators: A General Know-How
A broken radiator with corroded parts can’t be fixed. It’s best to replace it before your car suffers irreversible engine damage.
Let’s see how a mechanic will replace the radiator.
Step 1: Prep the Vehicle
First, your mechanic will wear safety gloves and goggles for protection. They’ll also let the engine cool off completely as the radiator heat from the hot water (coolant) can lead to severe burns.
They’ll engage the parking brake and use a jack or jack stands to lift the vehicle and access the radiator.
Step 2: Drain the Radiator
They’ll open the radiator cap at the top of the radiator or coolant reservoir. Then, they’ll open the petcock valve (a small valve located at the bottom of the cooling system) or detach the lower radiator hose to drain the coolant onto a wide drain pan.
The engine coolant is toxic, so the mechanic will place a plastic sheet under the pan to avoid spills.
Step 3: Disconnect the Hoses
They’ll loosen the hose clamp of the reservoir hose using pliers or screwdrivers (the clamp keeps the hose stable in place). Then, they’ll twist and pull it out.
Next, they’ll use the same tool to detach the upper radiator hose.
Step 4: Detach the Cooling Fan and Transmission Cooler Lines
The mechanic will unscrew the cooling fan and remove it carefully. They’ll also detach the transmission cooler lines connected to the radiator.
Note: Transmission lines carry hot fluid from the car’s transmission to a built-in transmission cooler within the cooling system.
Step 5: Remove the Old Radiator
Next, they’ll unscrew the bolts of your old radiator and remove it. In some cars, the radiators can be removed from the top, but in others, they’re accessible from underneath.
Step 6: Install the New Radiator and Reconnect all the Parts
The mechanic will take the new radiator unit and install it. Before reconnecting the transmission lines and fan, they’ll check if a transmission refilling or oil change is required.
Next, the mechanic will inspect and replace the hoses if they are clogged or damaged. They’ll connect and fix the upper and lower radiator hose.
Afterward, they’ll reconnect the reservoir hose and secure it with its hose clamp.
Step 7: Refill the Radiator with Coolant
The mechanic will add coolant to the system and shut the radiator cap.
However, if the old coolant has debris and grime, they’ll perform a radiator fluid exchange. They’ll use a 50/50 ratio of water and a compatible coolant.
Step 8: Bleed the Cooling System
They’ll bleed any residual air that can hamper your new radiator.
Finally, they’ll check for a coolant leak or another radiator issue to ensure the new unit is functional.
Wondering how much this elaborate process will cost?
Let’s check.
How Much Does a Radiator Replacement Cost?
Radiator repair or replacement can cost between $200 and $1,200. If you want repairs, the cost will be between $250 and $550.
Here are estimates of some related repairs:
- Thermostat: $200 to $500
- Radiator hose: $80 to $350
- New radiator: $600 to $1200
Radiator replacements can be expensive. But some money-saving tips (covered later) might lighten your burden.
Want to know more about car radiators?
Let’s settle your curiosity.
4 FAQs on Car Radiators
Here are answers to some questions you may have:
1. How Does a Car Radiator Work?
When the thermostat detects a rise in the engine temperature, it releases the coolant. The water pump carries the coolant around the engine block to absorb heat.
The hot water (coolant) then passes through the thin metal fins and tubes of the radiator to dispel heat. Here, the outside air cools the radiator heat as the fluid passes the fins. Once it’s cool, the pump carries the coolant back to the engine block.
All parts of the cooling system must work efficiently to keep the engine cool.
2. Is It Worth Replacing the Radiator in My Car?
Yes, it is economical to replace a defective unit. But you can ask the mechanic to first check for a radiator leak, a broken thermostat, or a cracked pump. Sometimes, your car only needs a thermostat or water pump replacement instead of a new radiator unit.
3. How Can I Maintain My Car Radiators?
You can take these measures to avoid a radiator problem:
- Get your radiator checked if you smell something odd or hear hissing sounds from the engine.
- Avoid rash driving to reduce pressure on your cooling system.
- Perform a radiator fluid exchange annually to flush the grime and dirt from the current coolant.
- Instead of tap water, mix distilled water with the antifreeze to refill the radiator. Tap water contains dirt particles that can harm your unit.
- Drive your car regularly to keep the cooling system running.
4. How to Save Money on Radiator Replacements
Here’s what to do to save some cash:
- Self-study: Learn to identify early signs your car may show to avoid costly engine damage. You can also check the prices of auto services in your area to avoid being overcharged.
- Verify your warranty: See whether your car warranty covers a radiator repair service.
- Choose aluminum over copper: Aluminum radiators are cheaper than copper ones. But they’re less durable than copper radiators. So, choose which is compatible and best for your car in the long term.
- Get a pre-used radiator: If tight on budget, opt for a second-hand or aftermarket radiator.
- Consult a mechanic: Talk to a mechanic to weigh your options. It’s possible to save on a radiator issue with minor repairs like a hose or water pump replacement.
Restore Your Engine’s Cooling With AutoNation Mobile Service
A functioning radiator protects your car engine from overheating. But if it malfunctions, you need to get it checked ASAP.
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