Mercedes-Benz S430 Pressure Test Radiator Cap at your home or office.

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Pressure Test Radiator Cap Service

How much does a Pressure Test Radiator Cap cost?

On average, the cost for a Mercedes-Benz S430 Pressure Test Radiator Cap is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2006 Mercedes-Benz S430V8-4.3LService typePressure Test Radiator CapEstimate$114.99Shop/Dealer Price$132.49 - $145.62
2000 Mercedes-Benz S430V8-4.3LService typePressure Test Radiator CapEstimate$94.99Shop/Dealer Price$112.52 - $125.67
2004 Mercedes-Benz S430V8-4.3LService typePressure Test Radiator CapEstimate$94.99Shop/Dealer Price$112.52 - $125.67
2002 Mercedes-Benz S430V8-4.3LService typePressure Test Radiator CapEstimate$94.99Shop/Dealer Price$112.48 - $125.60
2003 Mercedes-Benz S430V8-4.3LService typePressure Test Radiator CapEstimate$94.99Shop/Dealer Price$112.55 - $125.72
2005 Mercedes-Benz S430V8-4.3LService typePressure Test Radiator CapEstimate$94.99Shop/Dealer Price$112.52 - $125.67
2001 Mercedes-Benz S430V8-4.3LService typePressure Test Radiator CapEstimate$99.99Shop/Dealer Price$117.28 - $130.25
Show example Mercedes-Benz S430 Pressure Test Radiator Cap prices

What is the radiator cap pressure test all about?

In a pressurized cooling system like those found on all cars, your car’s radiator cap is calibrated to seal in coolant to a particular pressure point, then allow some vapor to escape once that threshold has been reached. The ejected fluid is piped into the overflow bottle you might have seen in the engine bay. Then, as the engine cools, the coolant level may drop inside radiator. When that happens, a reverse-flow valve in the radiator cap opens to allow fluid from the bottle to return to the radiator. A radiator cap that isn’t working properly may cause too much fluid to escape the system.

Keep in mind:

  • A radiator cap pressure test is quick and simple, and replacement radiator caps are inexpensive.
  • Leaving a defective radiator cap in place can cause damage to the engine.

How it's done:

  • The vehicle engine is cooled before the radiator cap can be removed
  • The radiator pressure is relieved and the cap is removed
  • The radiator cap is pressure tested to specifications
  • The radiator cap is replaced and/or reinstalled to the radiator
  • The vehicle is verified to confirm problem is fixed

Our recommendation:

If your car’s engine overheats, or the overflow bottle seems overly full, have the radiator (and radiator cap) pressure tested.

What are the common symptoms indicating you need to pressure test the radiator cap?

  • Car overheats
  • Car’s overflow bottle fills up

How important is this service?

Not having this safety valve on the car’s cooling system operate properly can over- or under-pressurize the system, leading to damage to hoses, the radiator, and even the car’s cylinder head.

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Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(82)

Rating Summary
78
2
1
0
1
78
2
1
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1

Chris

22 years of experience
2235 reviews
Chris
22 years of experience
Mercedes-Benz S430 V8-4.3L - Cooling System Flush - Newport Beach, California
I've used Chris for a few years and have never been disappointed. Very knowledgeable, always timely, if not early, does great work and the key ingredient of all, he's the most honest mechanic you will ever meet. I would highly recommend Chris to anyone. Your mechanic on the other hand is not the most forthright company on the planet. I have recommended them numerous times to friends and colleagues and never receive credit for it. Changed their billing and revenue model as well.

Joel

21 years of experience
987 reviews
Joel
21 years of experience
Mercedes-Benz S430 V8-4.3L - Tie Rod End Replacement (Front Left Outer, Front Right Outer) - Jacksonville, Florida
Great service at a fair price!

Caz

17 years of experience
107 reviews
Caz
17 years of experience
Mercedes-Benz S430 V8-4.3L - Fuel Injector - Acworth, Georgia
Knowledgeable and professional.

Simon

27 years of experience
291 reviews
Simon
27 years of experience
Mercedes-Benz S430 V8-4.3L - Serpentine/Drive Belt - Capitol Heights, Maryland
Simons did a great job with my car and was very helpful.

Excellent Rating

(82)

Rating Summary
78
2
1
0
1
78
2
1
0
1
Number of Mercedes-Benz S430 services completed
902+
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TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
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