Why You Need a Functioning Water Pump In Your VW

Your water pump is just as important to your Volkswagen as your heart is to your body. It circulates coolant through the engine and radiator. Without coolant, your engine will overheat and a bunch of serious engine problems will crop up. In other words, a functioning water pump is absolutely necessary in order for your engine to run at all.

OEM water pump

A water pump may fail as a result of one of the following common problems:

  • Cracked or warped water pump pulley
  • Worn bearings
  • Broken impeller shaft
  • Poor coolant maintenance
  • Wrong coolant

What Happens When Your Water Pump Fails

One of the first signs of a failing water pump is a strange noise. Some of the most common noises associated with a bad water pump are:

  • Rattling: Usually means bad bearings or a broken impeller shaft
  • Clicking or squeaking: Usually means bad bearings
  • Grinding or whining: Usually means bad bearings or water pump pulley

Other symptoms include:

  • Frequent indicators from the engine temperature gauge that the engine is running hot
  • Coolant leaking from the weep hole
  • Steam coming from the radiator
  • Wobbly pulley when the engine is running

You need to replace your water pump as soon as you spot the symptoms and confirm that your water pump is the issue. Otherwise, serious engine issues could crop up. For example, there could be blown head gaskets, cracked cylinder heads, and/or burnt pistons. The engine block could get cracked too, and in extreme cases the engine will seize.

What Happens When You Use an Aftermarket Water Pump

Replacing VW pump

If you replace your bad water pump with an aftermarket unit, chances are high the aftermarket unit will fail earlier than expected. Most aftermarket water pumps are built with universal components, such as bearings and impellers, and inferior quality materials. Also, it’s pretty rare for an aftermarket water pump to be backed by a warranty. So if your aftermarket water pump fails, you’ll likely need to buy a new one.

OEM Replacement Water Pumps

Your best bet is to replace your water pump with an OEM unit. To find the right part for your Volkswagen, look up your car in our catalog of genuine OEM water pumps. For your convenience, we’ve put together a list of quick links to our top selling water pumps: