Operation of the SUV VAZ-21213 The problem with this model is that it often puts heavy strains on the powertrain, which inevitably leads to wear and tear on the sealing elements. One of the most common problems faced by owners of this model is the flow of oil through the crankcase gasket. The situation is aggravated by the design features of the all-wheel drive transmission, where the transfer case and the front axle create a serious obstacle to access to the bottom of the engine. Many motorists mistakenly believe that for quality repairs you need to completely dismantle the engine, which is a laborious and expensive process.
However, experienced mechanics know that pallet-plate It's possible to do it right on the car, if you stick to a certain technology and have the right set of tools. This approach saves a significant amount of time and money, avoiding complex operations to undock the gearbox and remove the ICE. The key here is to understand the geometry of the body and transmission, and use specific techniques to deflect the engine to the side.
In this article, we will discuss each stage of work in detail, paying special attention to the nuances that are often overlooked by beginners. You will learn how to safely lift the power unit, how to better clean the surface of the old sealant and what point of tightening the bolts will ensure the tightness of the lubrication system for a long time. A competent approach to the matter will allow you to eliminate the oil leak once and for all, saving the engine life.
Diagnosis of the sealing condition and preparation for repair
Before you start to act, you need to make sure that the source of leakage is the pad, not, for example, the crankshaft oal or oil pressure sensor. Visual inspection from the bottom of the car often gives false results due to the fact that the incoming air flow smears oil throughout the bottom of the engine. Carefully clean the crankcase and block from dirt using brake-cleaner Or gasoline, and then conduct a test trip.
If after washing and short run oil drops protrude clearly on the perimeter of the junction of the crankcase and the cylinder block, the diagnosis is confirmed, it is also worth checking the condition of the pallet itself: on the Nivah it often deforms from impacts on stones or obstacles on the road. Flat curvature can make it impossible to seal even with a new high-quality gasket, so this parameter requires mandatory verification.
To successfully carry out the work, you will need an observation pit or overpass, since the jackrot will not perform the operation efficiently. Prepare a set of keys, including elongated heads and rattles, since some bolts are located in hard-to-reach places. heat-resistant and a degreaser.
⚠️ Warning: Before you start any work under the car, make sure that the car is securely fixed with recoil stops and is on the hand brake.
It's also important to drain the engine oil before dismantling, and although many people try to do oil surgery inside, it puts extra pressure on the seams when the engine is distorted and can contaminate the work area, and drain the workflow into a clean tank to assess the condition of the engine by the presence of shavings.
Required tool and supplies
The quality and speed of the work depends on the preparation. Niva 21213 is characterized by 8 bolts of pallet mounting, which often sour. You need a good set of heads by 10 mm, necessarily with a long collar or a powerful rattle. Standard keys may not cope with the force, so the presence of a good set of heads by 10 mm, necessarily with a long collar or a powerful rattle. extender And the collar is mandatory.
Special attention should be paid to the choice of sealing element. Classics and Niva are often put pads made of cork-rubber mixture or paronite. Experienced craftsmen recommend using quality analogues from manufacturers like Victor Reinz or ElringAlternatively, you can only use heat-resistant sealant gasket, but this requires perfectly flat surfaces.
- 🔧 A set of heads and keys (main emphasis on the size of 10 mm).
- 🧴 Degreasing agent (acetone, white spirit or specialized chemistry).
- 🔪 A scraper or blade to remove an old sealant.
- 🛢️ Fresh engine oil and filter for subsequent replacement.
For ease of use, it is also recommended to prepare a metal brush and rags. Do not use sandpaper to clean landfill surfaces, as it can leave scratches that violate leakage.
☑️ Preparation for the removal of the pallet
Engine lifting technology and access to bolts
The most challenging step that scares many owners is to have access to the pallet mount bolts. On Niva 21213, this is hampered by the front axle and transfer case elements. There is a proven method to push the engine back and lift it without taking off the supports completely, which requires a wooden bar and a jack.
Set the jack under the crankcase of the engine through a wide wooden gasket so as not to damage the metal. Carefully raise the engine a few centimeters to unload the front cushions. Then you need to loosen the mounting of the front crossbar of the body or use the method of pulling the engine with an mounting blade through the arch of the wheel.
Often, it's enough to just remove the front splashers and the crankcase protection to get the right angle of access. If the bolts still don't unscrew from behind the bridge, you can try to turn the wheels into the extreme position, which will change the geometry of the suspension a little bit. release Or pipes.
Secret to accessing back bolts
The rear bolts of the pallet on the Niva are often closed with a beam. If you can not move the engine back, you can try to turn the bolts of the mounting of the front support of the engine to the body, and leave the opture on the block, which will give a backlash of 2-3 cm.
In some cases, the craftsmen are advised to temporarily unscrew the generator mount and pull it aside to make room for the tool to maneuver. It may also be necessary to remove the starter if it interferes with the approach to the bolts on the right side. Each car is different, so assess the situation on the spot.
The process of dismantling the crankcase pallet
Once you have access, you can unscrew the bolts. Move from center to edges, gradually loosening the puff. If some bolt fails, don't use excessive force right away -- try tapping it or using penetrating lubricant like this. WD-40A sharp effort can cause the bolt cap to break, which will turn a simple repair into a long drilling procedure.
When all the bolts are twisted, gently swing the pallet from side to side to tear it off the sealant. On older engines, it can "fix" dead, in which case you can use a thin chisel or a special knife to cut the sealant, carefully inserting it into the joint. Be careful not to damage the landing plane of the cylinder block.
The removed pallet should be thoroughly cleaned of oil residues and old pads. Examine the inner cavity for metal shavings, which may indicate problems with the liners or rods. The cleanliness of the inner surface of the crankcase is as important as the cleanliness of the docking planes.
Surface preparation and selection of sealant
The quality of the surface preparation determines how long a new gasket will last. Use a sharp knife or razor blade to remove all the remnants of the old gasket and sealant from the block and the pallet itself. Movements should be parallel to the plane so as not to leave deep draws. After mechanical cleaning, be sure to degrease the surfaces.
When choosing a sealant, prefer red or black silicone formulations labeled "High Temp" or "For gaskets." Conventional plumbing silicones will not withstand the temperature and aggressive environment of motor oil. Apply the sealant should be a thin continuous layer if you use a gasket, or a thicker layer if you work without it (although the gasket is more reliable).
| Type of material | Temperature conditions | Resistance to oil | Recommendation |
|---|---|---|---|
| Cork-rubber gasket | up to +150°C | High. | Recommended with a light sealant |
| paronite | up to +250°C | Medium | It requires a perfect plane. |
| Anaerobic sealant | up to +300°C | Very high. | Only for the perfect planes. |
| Silicone (red) | up to +220°C | High. | Universal option |
When you install a new gasket, you don't have to smear it completely, just apply thin strips of sealant at the joints and around the bolt holes, and this locks the gasket in place and fills in the micronervousness, and the excess sealant that's squeezed into the engine can clog the oil receiver, so don't overdo it.
Assembly, tightening and monitoring of the result
Putting the pallet in place requires care. It's important not to move the pad when you're mounting. The bolts are twisted by hand to the end, and then the final puff is done. It's critical to follow the tightening order: start from the center and spiral to the edges, so you can fit evenly and not stress the metal.
The moment of tightening of the bolts of the Niva pallet is about 8-10 Nm. You can not pull them, since you can tear the thread in the aluminum block or deform the pallet, which will lead to a new leak. If you do not have a dynamometer key, twist the bolts tightly, but without using the collars of the large shoulder, it is enough to force one hand on the rattle.
After assembly, you have to wait until the sealant is polymerized, which usually takes 1 to 3 hours, depending on the ambient temperature and the type of composition, and then you can fill the oil and start the engine, and the first start should be supervised: check for no leaks on the engine running and after cooling.
⚠️ Warning: Do not try to warm up the engine immediately after you have set the pallet to full power. Let the sealant gain initial strength at idle speeds for 10-15 minutes.