Volkswagen Water Pump Replacement – UnderhoodService

Volkswagen Water Pump Replacement

We bought another loaner. It's a 2003 Volkswagen Jetta that's loaded with heated leather seats, heated power mirrors and the 1.8L turbo engine. It's got the premium stereo and it's my favorite color, black. It only has 125,000 miles on it and it's current on its timing belt and other services. I thought we were going to have to do a minimum of service to get it ready to use as a loaner, until I noticed the temp gauge reaching for the red.

/10645717311jpg_00000057414.jpg” border=”0″ ” align=”right” alt=”photo 17″/>the two bolts (see Photo 16) that hold the side bracket to the mount and the three bolts that hold the mount in (see Photo 17).

photo 1811. Remove the two clips (see Photo 18) that hold the upper timing cover on, and then remove the bracket to which the engine mount was attached. There are three bolts (see photo 19Photo 19) that hold it on and you may have to raise the engine slightly to get it out of the way.

photo 2012. There aren’t really any ­special procedures to do a ­timing belt on this model, so just line up photo 21the timing marks. We put a dab of Wite-Out on the marks so it’s easier to see them (see Photo 20). We then remove the four Allen bolts (see Photo 21) that hold the crank pulley photo 22on, and the four bolts that hold the lower timing cover on (see Photos 22 and 23). We can photo 23photo 24now see the timing belt, tensioner and roller and the water pump (see Photo 24).

13. Normally, we are ­installing all new parts so we can unbolt the tensioner and just take the belt photo 25off. A new tensioner comes collapsed, so once the new parts are installed and we make sure the timing marks are aligned, we just pull the pin (see Photo 25) on the tensioner and we’re good to go. It’s important to check the engine code to make sure you get the correct parts ­because VW and Audi made ­several variations of the 1.8L and 2.0L motors.

14. We will reuse all of our parts (except the water pump) ­because they were installed 20,000 photo 26miles ago, so we need to collapse the tensioner (see Photo 26) to ­remove and reinstall the belt. The factory tool part number is T10092. It’s basically a 5mm x 0.8 bolt that is 60 mm long and a large washer. Either works well. Slowly screw the bolt in until the belt slides off the water pump.

photo 2715. Remove the three bolts that hold the water pump in and remove it. We can see the impeller came out in pieces (see Photo 27). Clean up all the mating surfaces and install the photo 28photo 29new pump (see Photos 28 and 29). Hook up your airlift and make sure the thermostat and water pump won’t leak (see Photo 30). If everything checks out OK, refill the cooling photo 30system and double check for leaks. We don’t want a comeback because of a pinched or cut O-ring.

16. Everything looks leak-free, so we reinstalled our timing belt and checked our marks (see photo 31Photo 31). Unscrew the tensioner to tension the belt, and then rotate the engine over two times and recheck the marks. If everything lines up, reinstall the lower timing cover and crank photo 32pulley (see Photo 32). Install the belt cover and intercooler tube and make sure the rubber couplers and clamps are secure. Even a small leak can give you driveability problems and a check engine light. Torque the wheel and let’s finish putting it all back together.

17. Reinstall the upper engine mounting bracket and the upper timing belt cover. Install the engine mount and bracket and hook up the power steering reservoir and coolant reservoir.

18. Reinstall the alternator and serpentine belt tensioner and belt.

Photo 3319. Put the throttle body back on and hook up the air duct. We put the engine covers back on and we are ready to start it up (see Photo 33). The car runs great and I’m ready to send it out as a loaner.

We’ve done hundreds of these water pumps over the years and there are many variations of ­timing belt setups, depending on manufacture date, engine code and where the car was made. That’s why it’s so important to get the engine code when looking up the parts. The code is usually stamped on the cylinder head and is also on the engine sticker on the timing cover. You can also get it by running the VIN number.

What’s most important is to educate your customer about the importance of doing the complete job. They may remember the low price they paid, but will quickly forget your recommendation to replace the water pump, or your warning that they will have to pay the labor again should the water pump fail. Worse yet, the tensioner or a roller could fail and cause a catastrophic engine failure a year after the timing belt was done, and you know who would get the blame for that.

So, get a timing belt display from one of your suppliers and save some worn out or broken parts to show your customers. It’s easy to sell the complete job with a little show and tell.

You May Also Like

Long-Life Coolants Explained

Different types of coolants cover a range of applications from diesel to domestic, Asian and European vehicles. Each one is formulated to a specific manufacturer’s specifications to keep their engines at an optimal temperature. But, changes to the old one-size-fits-all formula has led to confusion for consumers and even some technicians.

It may be hard to believe, but antifreeze has been around since the mid-19th century and was used initially in dynamite before finding its way into the automobile. Early engine designers tried other means of cooling before antifreeze gained a foothold. It came to prominence during World War I when it was used in tanks and vehicles to prevent them from freezing in the battlefield.

VIDEO: Engine Efficiency Brings More Hoses

Andrew Markel discusses hoses and the necessity for several of them to route fluids to all parts of the vehicle due to the growing efficiency of engines. Sponsored by Dayco.

Diagnosing Intelligent Cooling Systems

The majority of cooling systems on the roads react to what is happening inside the combustion chamber. After the engine is stressed, the heat causes the thermostat to open. Increases in temperatures will also cause the cooling fans to come on. The heat carried by the coolant is the trigger for operation of the fans and thermostat.

Modern Cooling System Design: It’s Not About Temperature; It’s About Powertrain

Given the advanced state of internal combustion engine technology, some recent cooling system innovations will actually increase engine torque and fuel economy while reducing exhaust emissions. Let me simplify that idea: new cooling system technology will make engines run better and cleaner. So, let’s get on the same page by reviewing some basics.

Modern Cooling System Design: It’s Not About Temperature; It’s About Powertrain

Reading engineering papers tends to be a boring exercise, but they do give a technician like myself a new perspective on how a common automotive cooling system could actually be improved. Of course, our immediate thought is how the cooling system can keep the engine cooler. Not so, according to one paper.

Other Posts

Why Does Engine Coolant Need Replacement?

Two specifications can be used to justify replacement — the condition of the additive package & the freezing point.

Improving Turbocharger Longevity

It is estimated that by 2022, 50% or more of vehicles sold in the U.S. will have one or more turbochargers under the hood.

Mini Cooper Water Pump Service

The water pump is turned by a metal wheel driven by the crankshaft pulley.

Warn Your Customers About Water Pump Failure During the Summer

Summer is an opportune time for automotive professionals to remind customers to keep an eye on the signs of a failing water pump.  As you know, extreme summer temperatures and added strain on vehicles from activities like long road trips can cause engines to become more susceptible to troubles from excessive heat, making the function