Mercury LN7 Water Pump Replacement at your home or office.

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Water Pump Replacement Estimate for Mercury LN7

Mercury LN7 Water Pump Replacement costs $407 on average.

CarServiceEstimateShop/Dealer Price
1982 Mercury LN7L4-1.6LService typeWater Pump ReplacementEstimate$590.37Shop/Dealer Price$703.96 - $969.37
1983 Mercury LN7L4-1.6LService typeWater Pump ReplacementEstimate$536.37Shop/Dealer Price$650.00 - $915.45
Show example Mercury LN7 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.

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Meet some of our expert Mercury mechanics

Real customer reviews from Mercury owners like you.

Excellent Rating

(17)

Rating Summary
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Alonzo

27 years of experience
41 reviews
Alonzo
27 years of experience
Mercury Grand Marquis V8-4.6L - Water Pump - Chicago, Illinois
Friendly and expert guy ,, he knows a lot about car mechanic explained very well saved me money by diagnosing the exact issue.

James

41 years of experience
79 reviews
James
41 years of experience
Mercury Montego V6-3.0L - Water Pump - Cleveland, Ohio
Excellent mechanic, showed up on time, completed the work within a hour and was done. That is what I like, do the job correctly and be done. I will be using him again.

Noe

36 years of experience
604 reviews
Noe
36 years of experience
Mercury Milan L4-2.5L Hybrid - Water Pump - Seattle, Washington
Noe was very prompt and arrived at the exact time the appointment was booked for. Even though it was dark and cold while he performed the work he was very conscientious and did not rush to complete the job. He seemed to really enjoy working on cars and was very knowledgeable .

James

5 years of experience
10 reviews
James
5 years of experience
Mercury Mountaineer V8-5.0L - Water Pump - Kennesaw, Georgia
James was super professional, on time, and easy to work with.

Excellent Rating

(17)

Rating Summary
16
1
0
0
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16
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Number of Mercury Water Pump Replacement services completed
187+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercury MECHANICS
600+
experts on our platform

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