1. Low performance
The 1.8-liter VAZ-21179 engine began production in 2016. Its power rating of 122 hp sits at the level of engines from the turn of the century, while many modern units deliver similar horsepower from smaller displacements of around 1.6 liters. Yet, displacement often correlates with design refinement, not just raw figures. A larger displacement typically means higher fuel consumption within the same concept.
In practice, the VAZ-21179 is found under the hood of the Lada Vesta and XRAY models, aligning with the brand’s contemporary lineup.
2. Oil consumption
To cover potential complaints, the manufacturer notes that oil use can reach up to 700 ml per 1,000 km. Some 1.8-liter cars indeed use about half a liter over a thousand kilometers, which is within the norm only if topping up is not needed between services. In other words, the oil level on the dipstick should not fall below the minimum mark. Roughly a liter every 15,000 km or about 70 ml per 1,000 km is observed in some cases.
The cause of higher oil burn lies in the engine’s base design. The 1.8 engine is derived from a 1.6-liter block, with the piston stroke extended by using a larger crankshaft and a shorter connecting rod. This layout alters the load dynamics on the piston crowns.
As the connecting rod lengthens, sidewall loading on the piston decreases. A short connecting rod, by contrast, creates greater lateral force against the cylinder wall and raises the piston’s linear speed. This combination tends to accelerate wear of pistons and cylinders. Increasing the clearance between the piston and cylinder can help mitigate issues, but inspections often reveal gaps around 0.1 mm in engines with 20–30 thousand kilometers, while most engines stay closer to 0.03–0.04 mm. Shorted pistons can also bend toward the cylinder at sharp angles, compromising ring seals.
That mode harms piston rings, especially the cast iron oil scraper with a tubular structure. Its small oil drain holes can clog over time, amplifying oil consumption. To counteract this, pistons with anti-friction coatings were used, yet oil burning could not be fully eliminated. Owners should regularly monitor oil levels and top up as needed.
3. Reliability concerns
The timing belt in this series drives two camshafts and the coolant pump, with tension controlled by a roller. A belt failure can bring valves and pistons into contact, a problem familiar to many modern engines. On other belt-driven engines, VAZ includes piston recesses to prevent a collision, but the 1.8 model lacks this feature. To reduce the risk of catastrophic belt failure, regulatory changes were introduced: the timing belt should be replaced along with the rollers at 180,000 km for vehicles built before June 2021, and at 90,000 km for vehicles from June 2021 onward.
Belts wear due to several factors: oil ingress, antifreeze exposure, or repeated trips through deep water. A failed coolant pump or faulty tensioner can also ruin a belt. Replacing original parts with low-quality substitutes can lead to rapid failures. Some reports point out that the packaging lists Lada, but actual components may come from foreign suppliers such as GMB in Korea.
During overhauls, qualified shops may install non-stick pistons with deep valve grooves. The choice of pistons and rings can significantly cut oil consumption in the long run, and some services repair pistons with grooves to guard against unexpected valve contact.
4. AI-92 fuel advice
Many drivers who aim to save fuel use AI-92 gasoline. However, in several operating modes a loud detonation can occur, and drivers who do not notice it may end up rebuilding the engine due to piston damage.
5. Cost of repairs
Rebuilding the VAZ-21179 block tends to be pricier than more basic 1.6-liter engines, primarily due to spare parts costs. A typical timing belt kit can range from 15,000 to 30,000 rubles, and the original coolant pump starts at around 15,000 rubles.
Is it worth it?
The 1.8-liter VAZ-21179 is built on the 1.6-liter VAZ-21127 platform. This approach reduced development and production costs but did not meaningfully boost performance or ownership experience. If a modest power increase is not a priority, many drivers will find a simpler, more reliable option in the 1.6-liter VAZ-21129 engine.
Note: information compiled for enthusiasts includes practical tips and user observations from owners and service providers. Always consult a qualified technician to assess the health and suitability of any engine before purchase or repair.
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