1. Low performance
The 1.8-liter VAZ-21179 engine entered production in 2016. And the power indicators (122 hp) are at the level of engines of the turn of the century. Many modern units produce the same amount of horsepower with a displacement of 1.6 liters.
Meanwhile, liter power is an indicator of engine design perfection.
In addition, an engine with a larger displacement (while maintaining the general concept) will consume more fuel.
The VAZ-21179 engine was installed on the Lada Vesta and XRAY models.
2. Maslozhor
As an insurance against complaints, the manufacturer has included in the instructions that the oil consumption can be up to 700 ml per 1000 kilometers. And some cars with 1.8 liter engines really consumed half a liter of oil per thousand. Although it is considered the norm when the engine does not need to be topped up with oil between service intervals. That is, the oil level on the dipstick should not fall below the minus mark. It turns out about a liter per 15 thousand km (or about 70 ml per 1000 km).
What are the causes of maslozhora? The VAZ-21179 engine is made on the basis of a 1.6-liter engine block. At the same time, it was possible to increase the piston stroke only by installing a crankshaft with a larger crank and a shortened connecting rod.
But an engine with a short connecting rod creates a large lateral force that is transferred by the piston to the cylinder wall. In addition, the linear speed of the piston increases. And all this leads to a greater likelihood of wear and increased wear of pistons and cylinders.
Increase the mounting clearance of the piston in the cylinder to avoid problems. There are frequent cases when when dismantling an engine with a mileage of 20-30 thousand kilometers, a gap of up to 0.1 mm was found (for most engines it does not exceed 0.03-0.04 mm). In addition, the piston is short and bends into the cylinder with a large opening at tangible angles.
This mode deteriorates the performance of the piston rings. Especially the cast iron oil scraper with tubular structure. In addition, the oil drain holes in it are small and get clogged over time. And this only increases the maslozhor.
To reduce oil consumption, pistons with different anti-friction coatings (dark gray and brown) were used, but it was not possible to completely eliminate the oil burner.
Therefore, Lad owners with a VAZ-21179 engine should regularly check the oil level and top it up if necessary.
3. Lack of Reliability
The timing belt drives the two camshafts and the coolant pump. The tension is carried out by a roller. A broken belt leads to a meeting of valves and pistons – as indeed with many modern engines.
On the remaining belt engines, VAZ has provided recesses in the pistons that prevent an unwanted encounter. And on the 1.8 engine they are not. And to protect owners from expensive repairs due to premature belt breakage, the manufacturer has made regulatory changes: “The timing belt must be replaced along with the rollers at 180,000 km (on cars manufactured before 06.2021) or 90,000 km ( from 06.2021)” .
Many factors affect belt life. For example, the ingress of oil, antifreeze or even the frequent overcoming of deep puddles. A faulty coolant pump or tensioner can destroy the belt. When replacing used factory parts with low-quality analogues, cases of rapid disk failure are known.
When overhauling an engine, competent services install non-stick pistons with deep holes for the valves. At the same time, the choice of pistons and rings also achieves a radical reduction in engine oil consumption.
4. AI-92 is better not to pour
Those who like to save fuel fill seemingly acceptable AI-92 gasoline. At the same time, in some modes, a strong explosion can often be heard. And those who do not hear it go to the overhaul of the engine because of the destruction of the pistons.
5. Expensive to Fix
The capital of the VAZ-21179 engine costs more compared to 1.6-liter engines. First of all, because of the cost of spare parts. For example, the prices for a timing belt set range from 15 thousand to 30 thousand rubles. The original coolant pump costs at least 15 thousand rubles.
Do you need it?
The VAZ-21179 engine with a volume of 1.8 liters is made on the basis of a 1.6-liter engine VAZ-21127. This reduced the cost of design and production, but did not have the greatest impact on technical performance and consumer properties. If a small increase in power is not so important, then it is better to opt for a simpler and more reliable VAZ-21129 engine.
- “Driving” can also be read on Viber.
The expert “Behind the wheel” spoke about the design and operational shortcomings of the most powerful serial VAZ engine. And shared the secrets of how to eliminate some of them.
