Burning Oil Suzuki Grand Vitara 2.0 JB, J20A engine. What to do?
Burning Oil Suzuki Grand Vitara 2.0 JB, J20A engine. What to do?

Burning Oil Suzuki Grand Vitara 2.0 JB, J20A engine. What to do?

The 140-horsepower 2.0-liter J20A Suzuki Grand Vitara JB series engine was installed on the car until 2015. High oil consumption is considered one of the disadvantages of this engine, although often the burning of oil is the fault of the driver. If the engine mileage is just over 100,000 km, there is a chance to eliminate high oil consumption without major repairs.

Problems with the J20A Suzuki Grand Vitara 2.0 engine. Oil consumption

 

The two-liter Grand Vitara J20A engine can hardly be called an issue. But for those who need care, it’s definitely about him. With high-quality timely maintenance, this engine is able to go at least 400-500 thousand kilometers to overhaul. If you use quality spare parts and change the oil and antifreeze in time.

двигатель J20A

Issues with the Suzuki J20A frequently include timing chain noise, camshaft gear wear, chain tension, and chain tensioner and shock absorber wear. Practice shows that this is not a primary but a secondary issue, but its source in the oil starvation of the timing belt.

Sometimes we hear about the malfunction of the EGR valve of the Suzuki Grand Vitara J20A engine. These issues and diagnostic errors related to the valve and the exhaust gas recirculation system, we have considered in great detail here.

 

клапан егр J20A

However, the efficiency of the EGR valve is also related to the condition of the engine lubrication system. Not to mention the problems with the piston, which can die for literally 80,000 km if the engine starts to eat oil.

What oil consumption is normal for the Grand Vitara 2.0 liter J20A

 

Each manufacturer regulates the normal consumption of oil, provided that all systems function properly. Suzuki did the trick. It is officially stated that the oil consumption rate for the 2.0-liter J20A engine under normal operating conditions is up to 1000 g per 1000 km.

This is a huge amount of oil, as practice shows. However, during the run-in of a new engine or after overhaul, this consumption is considered quite normal for 4-5 thousand km. After running-in, according to drivers, a serviceable unworn engine requires topping up no more than 0.3-0.5 liters per 1000 km, i.e. about 3 liters per 10,000 km.

According to established expert opinion, atmospheric gasoline engines consume oil in the range of 0.1-0.3% of total fuel consumption, and turbine engines – up to 0.6-0.8%.

However, the flow will inevitably be, because the oil enters the combustion chamber on the valve stems, cylinder walls, and crankcase gases. It all depends on the design and level of wear of the engine.

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High consumption of Grand Vitara 2.0 J20A oil. Reasons

 

Purely theoretically, high oil consumption can be caused by leakage or consumption of soot for one reason or another. We will try to consider them in as much detail as possible in connection with the features of the J20A Grand Vitara engine.

Oil is leaking on the J20A engine

 

Leaks cannot always be determined quickly visually, but external leaks, unlike internal leaks, will be detected sooner or later. If even a small oil burner is noticed, especially a sudden one, it is important to inspect the following areas on the J20A engine:

  1. A leak from under the valve cover gasket. Leaks may not necessarily occur at the front of the engine when the oil in the spark plug wells is easy to detect. You need to inspect the entire engine around the perimeter of the cover.
    крышка грм витара 2.0
    Most often, the cover gasket leaks after disassembly, after overheating, or due to improper tightening (small or too much effort, broken tightening scheme).
    прокладка J20A
    The cover is tightened with a force of 11 N∙m, but in addition to the gasket (catalog number 11189-65J00) during installation it is necessary to change two semicircles (№11139-86500), washers for cover bolts (№11188-85FA0), and seals №1 81402). It is highly desirable to use a sealant, most prefer Victor Reinz Reinzosil +300 °C.
    герметик виктор рейнц
  2. Leakage of seals. The rear crankshaft seal (№09283-98002, original) begins to flow after 90-120 thousand kilometers. The difficulty is that leak is difficult to detect immediately because the engine oil goes into the crankcase cavity or torque converter if the car has an automatic transmission.
    течь заднего сальника J20A
    When oil flows appear at the junction of the transmission and the cylinder block, it is a clear signal of failure of the crankshaft oil seal (or oil seals of the primary shaft of the transmission). But it will still have to be removed together with the clutch or torque converter.
    течь масла J20A
    The front crankshaft seal (№09283-45012, original) leaks due to oil edge wear or crankshaft working surface wear. This leak is immediately visible, as the oil will not only leak onto the bonnet but will also splash all over the bonnet.
    In many cases, the culprit is the clogged crankcase ventilation system – crankcase gases under pressure simply squeeze the seals, creating strong leaks throughout the engine.
  3. Oil leakage from under the timing cover. Occurs most often due to high crankcase gas pressure or improper installation. The situation is sad because you have to disassemble half of the engine to remove this cover and replace the gasket. In fact, the same work is being done when replacing the timing chains.
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Wear of valve seals on J20A Suzuki Grand Vitara

 

Wear of valve seals (oil caps). Catalog number of oil caps – 09289-06003, original. Or KKL02-10-155 from NOK, too, drivers say, goes well, and they are the ones who come from the factory, the color is brown. As practice shows, this is the most common cause of oil on J20A engines. Original seals extract up to 80-90 thousand km.

сальники клапанов

Replacing them will be completely useless, and all the work will be in vain if the valve guide bushings and valve stems are already worn out. Therefore, before replacing the caps, carefully check the backlash in the guides, the presence of scratches and traces of wear on the valve stems. Any wear of valve seals or guides will be accompanied by smoke.

Oil escapes through the J20A cylinder head gasket

 

The oil burning cannot go unnoticed due to the depressurization of the channels of the cylinder head. Butter will go crazy, another question is where. There are only three options:

  • the oil goes into the cooling system through the communication channel with the lubrication system;
  • oil entering the combustion chamber;
  • oil outlet, on the cylinder block, but this refers to the leak.

However, it is possible that damage to the cylinder head gasket on the J20A engine can cause all three leaks at once. Just so the gasket does not burn or deform. There are always reasons, for example, crooked assembly of the head of the block and installation not on technology, with the wrong order of tightening of bolts or not under nominal effort.

порядок затяжки болтов гбц
The correct order of tightening the bolts of the head of the Suzuki Grand Vitara unit with J20A engine

Proper installation involves the use of a torque wrench and tightening in three stages – 34, 54, and 65-68 N∙m. Then turn 90° again and repeat the operation after 1000-1500 km.

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прокладка гбц J20A

It may not be at all in the head gasket but in the warping of the landing plane of the cylinder head J20A. This is due to improper tightening and severe engine overheating. In the second case, it will be mandatory to grind the plane of the cylinder head and check the plane of the cylinder block.

Oil removal rings

 

It is logical that it is clear why the oil consumption on Suzuki J20A engines increases when the oil rings wear out – the oil breaks into the combustion chamber and partly burns out, partly goes into the exhaust system. While clogging the EGR valve and expensive catalyst. In both cases, do not procrastinate with the repair, because it will turn into a good price.

However, not everything is so clear. Replacement of lubricating rings makes sense only if the engine mileage does not exceed 80-100 thousand km. Then you can forget about replacing the rings with new ones.

Catalog number of standard original rings – 12140-65J50 (face value).

кольца J20A

In 90% of cases, the oil burner on J20A engines is treated by replacing the oil caps, and the rings are changed only when the replacement of the valve seals did not lead to anything and the mileage is not more than 80 thousand km.

Cylinder block liner wear (ellipse)

 

Elliptical production on the cylinder liners of the J20A engine cylinder is an inevitable phenomenon, but the mileage is far more than 150 thousand km. This is the case if the engine is filled with good oil in time and put branded filters. As a rule, it is impossible to determine the wear of the sleeves by eye, use a special gauge and determine the degree of wear.

эллипс

After that it is necessary to grind sleeves to the repair size and to put a set of repair pistons with rings. And there for the company already change the inserts (root and connecting rod), if the wear of the crankshaft necks is strong enough.

поршни J20A

In fact, this is a major overhaul of the engine, when you have to buy repair pistons, rings, inserts, gaskets, timing chains with tensioners, and at the same time to replace the valve caps, guide bushings. In the worst case, you will need to grind the head of the block and the landing plane of the block itself, if the diagnosis shows warping.

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