Mercedes-Benz 400E Water Pump Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Get an upfront price

Service Location

Average rating from customers who
received a Water Pump Replacement.
Learn More

$836.00 - $895.00

Price range for all vehicles


YourMechanic Benefits

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Average rating from customers who
received a Water Pump Replacement.
Learn More


Water Pump Replacement Estimate for Mercedes-Benz 400E

Mercedes-Benz 400E Water Pump Replacement costs $867 on average.

CarServiceEstimateShop/Dealer Price
1993 Mercedes-Benz 400EV8-4.2LService typeWater Pump ReplacementEstimate$1229.56Shop/Dealer Price$1533.24 - $2170.57
1992 Mercedes-Benz 400EV8-4.2LService typeWater Pump ReplacementEstimate$1229.56Shop/Dealer Price$1533.86 - $2171.64
Show example Mercedes-Benz 400E Water Pump Replacement prices

Water Pump Replacement Service

What is a water pump and how does it work?

The water pump is a belt or chain-driven engine accessory bolted to the engine above the crankshaft pulley. The pump housing has an impeller that circulates engine coolant through the cooling system passageways in the engine block and cylinder head, on to the radiator, where the coolant temperature is reduced. . The lower temperature coolant then flows back to the water inlet on the engine and the water pump continues the cycle.

When to consider replacing the water pump:

  • Coolant leaks or overheating. The water pump impeller shaft is supported by a bearing. Eventually, the bearing or seal can wear and leak or damage the impeller. Many water pumps have weep holes near the pump bearing. If you see significant leakage from that weep hole, it is time to replace the pump.
  • Bearing roughness or noise. If the water pump shaft does not turn smoothly or the pump is noisy, the bearing is excessively worn. Pump replacement will be necessary.
  • Timing belt replacement. In engines where the water pump is driven by the timing belt, it is a good idea to replace the water pump at the same time the timing belt is replaced. The extensive work explains why it is always recommended to replace the water pump whenever the mechanic already has these components removed for regularly scheduled timing belt replacement.

How do mechanics replace the water pump?

  • The water pump is usually bolted to the front of the engine. The replacement procedure will vary depending on whether the pump is driven by the timing belt, the serpentine belt, or chain.
  • On a cold engine, the engine coolant is drained to a level below the water pump.
  • Components that require removing to access the water pump are removed, including the belt or chain that directly drive the pump.
  • The bolts holding the pump to the engine are removed and the pump is pulled out.
  • The gasket surface must be cleaned and the pump mounting surface inspected. A new gasket, rubber seal, or RTV sealant, as required, is installed and then the new pump. The bolts are torqued in sequence using a calibrated inch pound torque wrench.
  • For applications where the water pump is driven by the timing belt, the timing belt must be removed. Typically, this requires removal of the crankshaft pulley, timing belt covers, and timing belt tensioner. Once the new pump is installed, new coolant is added back while bleeding the cooling system of any air. The engine is then run and brought to normal operating temperature to check for leaks and ensure normal operating temperature.

Is it safe to drive with a water pump problem?

No. Should the water pump only leak a little bit, you can drive the car. However, a small leak could suddenly enlarge or the pump bearing might unexpectedly seize. Either circumstance would likely cause engine overheating. If a defective water pump causes the overheating, it is not safe to drive because of the damage to the engine.

When replacing the water pump keep in mind:

  • It is best to install a new cooling system thermostat when you install a new water pump, especially if the thermostat is old or original.
  • Completely flushing the cooling system is a good idea when you replace the water pump. Flushing can be done before or after pump replacement.
  • The rest of the cooling system should be inspected too — particularly rubber hoses, which have a limited lifetime.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating


YourMechanic Mercedes-Benz Water Pump Replacement Service

Average Rating

4.7/5

Number of Reviews

33

Rating Summary
28
2
2
0
1
28
2
2
0
1

Chris

21 years of experience
1899 reviews
Chris
21 years of experience
Mercedes-Benz ML320 - Water Pump Replacement - Dana Point, California
thanks chris outstanding job

Duane

24 years of experience
401 reviews
Duane
24 years of experience
Mercedes-Benz SL500 - Water Pump - Oceanside, California
I all my 64 years I have never met or experienced a mechanic of such high standards. Duane ranks highest with me not only as a mechanic but as a solid professional. As a senior quality manager and now COO of a company it was a pleasure to meet, talk and have Duane service my SL500. The car is a 95 and thanks to Duane it's running beautiful. Thank you Duane!

John

30 years of experience
53 reviews
John
30 years of experience
Mercedes-Benz E320 - Water Pump Replacement - Lexington, Massachusetts

Scott

35 years of experience
731 reviews
Scott
35 years of experience
Mercedes-Benz E350 - Water Pump - Chandler, Arizona
Scott arrived early for my weekend appointment. When he arrived at my house, I showed him the issue and the parts that need to be replaced. I asked him several questions regarding maintenance on other parts and he provided valuable information that will save me money and also keep my car in good shape. He worked nonstop even though it's hot outside. The estimated duration for the job is 5.5 hours but he completed everything in only 4.5 hours! That includes the test drive, sweeping and washing my garage floor. Scott also showed me the defect on the water pump as well as the parts that he replaced. After the appointment, he provided a very detailed report of the service with pictures and voice notes. I will definitely book Scott the next time my car needs to be serviced. I highly highly recommend Scott.

Excellent Rating


YourMechanic Mercedes-Benz Water Pump Replacement Service

Average Rating

4.7/5

Number of Reviews

33

Rating Summary
28
2
2
0
1
28
2
2
0
1
Number of Mercedes-Benz Water Pump Replacement services completed
363+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
900+
experts on our platform

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com