Engine cooling system Skoda Yeti with the 1.2 TSI engine is one of the most vulnerable components of the car. The plastic impeller and thermostat often fail ahead of schedule, which can lead to critical overheating of the power unit. Crossover owners are faced with the need to replace the water pump already at about 60-80 thousand kilometers, which is significantly lower than the standards stated by the manufacturer.
Ignoring the first signs of a malfunction leads to expensive repairs. If the plastic impeller is destroyed, it can jam, break the timing belt and bend the valves. Therefore, timely diagnosis and replacement water pump - this is not just prevention, but a way to save the engine from major repairs. In this article we will analyze all the nuances of choosing, diagnosing and independently replacing a pump with Skoda Yeti.
Symptoms of pump failure on 1.2 TSI
Determine that the water pump Skoda Yeti is close to failure, based on a number of characteristic signs. The very first signal is often a strange noise from the engine compartment. If you hear a whine, hum, or grinding noise coming from the timing belt area, this may indicate a worn pump bearing. The noise may vary with engine speed, becoming louder as you accelerate.
The second sure sign is a violation of the tightness of the system. In the pump zone, traces of antifreeze may appear, which eventually turn into a whitish plaque or stains on the cylinder block. Pay attention to the level of coolant in the expansion tank. If you are forced to regularly add antifreeze and there are no visible external leaks, it is possible that the liquid evaporates through microcracks in the pump body.
The thermostat and pump often change together, as they are in a single node. If the engine is too long to warm up cold or, conversely, overheats in traffic jams, the problem may lie in jamming the impeller. In this case, the temperature arrow on the dashboard can rise above the middle of the scale, which requires the car to stop immediately.
- π Extraneous noise (rumbling, howling) from the timing belt when the engine is running.
- π§ Sweats of antifreeze in the area of the lower part of the engine under the protective casing.
- π‘οΈ Unstable operation of the thermostat and rapid overheating of the engine.
β οΈ Warning: If the engine overheat indicator lights up on the dashboard, stop immediately and turn off the engine. Continuing to run with a faulty pump on the 1.2 TSI engine can deform the cylinder head in minutes.
Why does the pump break on 1.2 TSI engines?
Design feature of the engines of the EA111 family, which include: 1.2 TSIIt is the material used in the production of cooling system components. The manufacturer uses plastic impeller instead of metal. This solution was made to reduce cost and weight, but it was not the most durable in high temperatures and aggressive chemical environments of antifreeze.
Over time, plastic is deformed by heat, and its geometry is disturbed. This leads to the fact that the impeller begins to βhangβ on the shaft or touch the body of the pump. In addition, plastic is often stratified from the metal shaft, which is why the pump simply stops pumping fluid, although the shaft continues to rotate from the timing belt.
The second common cause of breakdown is poor-quality antifreeze. If you use cheap coolants that do not meet the specifications G12++ or G13They can cause corrosion of seals and the destruction of plastic. Also important is the tension of the belt timing, as excessive tension creates an increased load on the bearing pump.
- G12+
- G12++
- G13
- The original VW
Owners Skoda Yeti It is worth knowing that the replacement of the pump is often accompanied by the replacement of the thermostat, since they are structurally combined into one unit. This prevents the system from being re-disassembled in a short time.
- π§ Plastic impeller does not withstand temperature loads and is deformed.
- π’οΈ The use of low-quality antifreeze accelerates the wear of seals.
- βοΈ Incorrect tension of the timing belt destroys the bearing of the pump.
Selection of spare parts: Original or analogue?
When choosing a water pump for your Skoda Yeti There is a dilemma: take the original spare part or quality analogue. The original pump from Volkswagen Group (the article usually starts with 036 121 011...) often has a modified design, where the plastic impeller is secured more reliably, but the price remains quite high. This is justified by the guarantee of quality and accuracy of balancing.
There are proven analogues from brands Gates, Conti, H2O and Proma. These manufacturers offer products with metal impeller or reinforced plastic, which can even surpass factory reliability. However, there are many fakes on the market, so it is better to buy parts only from official distributors or trusted suppliers.
Pay special attention to a set of pads and bolts. Bolts mounting thermostat and pumps are often made of soft metal and have a one-time resource. When dismantling, it is better to immediately replace them with new ones to avoid the failure of the thread at the next assembly. Also, do not forget to buy fresh antifreeze in the required amount.
| Manufacturer | Type of impeller | Service life (approximate) | Price (conditionally) |
|---|---|---|---|
| Original VW | Reinforced plastic | 80-100 thousand km | High |
| Gates | Metal/Plastic | 100+ thousand km | Average |
| H2O | Metal | 120+ thousand km | Average |
| China No-Name | Cheap plastic | 10-20 thousand km | Low |
β οΈ Never install cheap Chinese equivalents of unknown brands on the 1.2 TSI engine. The risk of impeller destruction and plastic entering the cooling system is too high, which can clog the heater and salon heat exchanger.
For the 1.2 TSI engine, the best choice is the original pump with a modified impeller or a high-quality analogue with a metal workwheel from the Gates or H2O brands.
Preparation for replacement and necessary tools
Before starting work, it is necessary to prepare a workplace and a set of tools. You will need a lift or a hole as access to the bottom of the engine is limited. Also prepare a container for draining antifreeze - its volume will be about 3-4 liters. Be sure to wear gloves and safety glasses as antifreeze is toxic.
From the tools you will need: a set of heads and rattles (sizes 8, 10, 13, 16 mm), a collar, an extension cord, a key for a radiator drain crane and a dynamometer key for tightening bolts. To remove the belt, you will need a special tool for fixing camshafts and a flywheel if you plan to change the belt, but when replacing only the pumps you can do without completely disassembling the timing, if access allows.
Before starting work, let the engine cool completely. Opening the cover of the expansion tank on the hot engine will lead to the release of boiling antifreeze under pressure, which is dangerous to health. Disconnect the battery's negative terminal for safety.
- π§ Set of heads and keys: 8, 10, 13, 16 mm.
- π’οΈ The tank for draining waste antifreeze.
- π‘οΈ Safety gloves and glasses.
βοΈ Preparing to replace your pump
If you do not have experience with the 1.2 TSI engine, it is recommended to study the layout of the thermostat bolts in advance, as some of them are hidden behind other elements. Sometimes it is necessary to remove the battery and its platform for easy access to the top of the pump.
What to do if the thermostat bolts are stuck?
If the bolts do not unscrew, do not use excessive force. Use a penetrating lubricant (WD-40) and give it time to act. You can carefully warm the connection site with a building hair dryer, but do not overheat the plastic of the thermostat body.
Step-by-step instructions for replacing the pump
Start the process with the removal of the engine protection and the drain of coolant. Open the hood, unscrew the expansion tank lid and loosen the drain plug on the radiator. Remove the lower protection of the engine by unscrewing the fasteners. Place the container under the radiator and open the drain. After that, move under the car and unscrew the drain plug on the cylinder block, if it is provided by the design.
Next, the plastic casings of the timing system must be dismantled. Remove the upper and lower casings, removing them from the fasteners. This will open access to the belt and pump. If the pump is driven by the timing belt (which is true for 1.2 TSI), the belt should be loosened or removed, pre-fixing camshafts. It is important not to disrupt the gas distribution phases.
Unscrew the thermostat mount bolts and pumps. Usually there are four or five. Be prepared for the fact that the remainder of antifreeze may leak out of the landing place. Carefully remove the knot, trying not to damage the adjacent surfaces. Clean the surface of the cylinder block of the old sealant and plaque using a plastic scraper.
Install a new pump with a new gasket. Apply a thin layer of sealant if required by the instructions for a particular model. Wrap the bolts, observing the tightening moment (usually about 10 Nm, but it is better to specify in the service manual). Set the timing belt, checking the matching marks. Put on the casings and fasten them.
Thermostat bolt tightening moment: 10 Nm + 90 degrees (if new bolts)Pour new antifreeze into the system, removing air traffic jams. Start the engine and let it work at idle speeds until the radiator fan turns on. Check for leaks at the pump installation site. Add the fluid to the level if it has gone into the system.
When replacing the pump, be sure to replace the belt and the timing, if its mileage is the limit value. This will save time and money in the future as access to both nodes is the same.
Check the stove. If it's blowing cold air, there may be a traffic jam in the system. Try to gas the engine several times or rock it to expel air from the heater.
Proper installation of the new pump requires careful cleaning of the landing place and compliance with the timing of tightening of the bolts to avoid repeated leaks.
Cost of work and terms
If you decide not to make a replacement yourself, and contact the service, it is worth considering the cost of work. Nana Skoda Yeti replacement pump - time-consuming operation, as it requires removal of protection, casings and often the battery. On average, the cost of work in specialized service stations is from 3000 to 5000 rubles. In dealerships, this amount may be higher.
The price of the spare part itself varies depending on the manufacturer. The original pump costs about 4000-6000 rubles, while a quality analogue can be found for 2000-3000 rubles. Do not forget to take into account the cost of antifreeze (about 1000-1500 rubles for 5 liters) and gaskets.
The total cost of replacement "turnkey" in the service will be from 7000 to 10000 rubles. Self-replacement will save about 3000-5000 rubles, but will require the availability of tools and free time (about 2-3 hours).
- π° The cost of the original pump: 4000-6000 rubles.
- π οΈ The cost of work in the service: 3000-5000 rubles.
- π’οΈ Antifreeze and gaskets: 1500-2000 rubles.
Regular check of the cooling system condition and timely replacement of the pump Skoda Yeti With a 1.2 TSI engine, you can extend the life of your car. Do not skimp on the quality of spare parts and use only proven cooling liquids.
How often should I change the pump to the Skoda Yeti 1.2 TSI?
It is recommended to change the pump every 60,000-80,000 km of run or every 4-5 years, even if there are no obvious signs of malfunction. The design feature of the engine requires preventive replacement.
Is it possible to drive with a faulty pump?
It's not recommended. Driving with a idle pump will lead to overheating of the engine, which can result in major repairs or a complete replacement of the engine due to deformation of the GBC.
Do I need to change the timing belt along with the pump?
Yes, if the belt mileage exceeds 60,000 km. Since the belt has to be removed to replace the pump, it is logical to install a new belt to avoid re-disassembly in the near future.
What antifreeze should I use after replacement?
Use the original VW G12++ or G13 antifreeze, or a quality counterpart with the appropriate specification. Mixing different types of antifreeze is unacceptable.
How long does it take to replace a pump?
For an experienced master, the replacement takes about 1.5-2 hours. For a beginner without experience with the 1.2 TSI engine, the process can take 3-4 hours.