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Basic data on the Suzuki J20A engine is shown in the table: The J series of engines has design features:
- Two timing chains. For each of them, vibration amplifiers and tensioners are provided.
- The cylinder block, its head and intake manifold are made of aluminum.
- The exhaust manifold is cast, made of cast iron.
- The timing mechanism is with two overhead camshafts (DOHC).
- Aluminum cylinder block, cast iron cylinders.
- V-ribbed belt on the front of the engine to drive auxiliary devices.
- Multipoint injection.
- PCV crankcase ventilation valve.
- EGR valve for exhaust gas recirculation.
- Catalytic converter.
An important characteristic of the engine is timing chains, which, unlike belts, last longer. Also, the probability of their breakage is small, since wear of the chains is accompanied by atypical noise and “swimming” of idle speed. However, if a break in the small chain occurs (this is possible due to oil starvation), then the pistons are 100% likely to bend the valves, which will require their replacement. If a large chain breaks, there is a 50% chance that valves and pistons will collide.
Chain Replacement Materials
One of the most difficult procedures when repairing a J20A engine will be replacing the chains. When replacing, you will need the following materials:
- Chain tensioner (part number 12831-77E02).
- Chain tensioner (part number 12832-77E00).
- Small upper chain (number 12762-77E00).
- Large lower chain (number 12761-77E11).
- Calmizer (number 12771-77E00).
- Calmizer (number 12772-77E01).
- Support for the tensioner (number 12811-77E00).
- Tensioner gasket (part number 12835-77E00).
- Oil seal for the front part of the crankshaft (number 09283-45012).
- Valve cover gasket (number 11189-65J00).
- Valve cover mounting seals (number 11188-85FA0) – 6 pcs.
- Spark plug well seal (number 11179-81402) – 4 pcs.
Chain drive gears usually do not require replacement.
Service
Caring for the Suzuki Grand Vitara engine involves regular maintenance including changing oil, filters and spark plugs. The plant recommends changing the oil in the J20A engine after 15 thousand km. But taking into account the operating conditions of cars in Russia, it is recommended to reduce the frequency of oil changes to 10 thousand km.
According to the instructions, it is necessary to use Suzuki Motor Oil brand oil with parameters 0W-20 for the engine. As an alternative, many owners use synthetic oils that meet the 5W-30 standard. The capacity of the oil system is 4.5 liters, but when replacing the old oil is not completely removed, so 4.2-4.3 liters are poured into the crankcase.
One of the important points of engine maintenance is the replacement of drive chains camshafts. According to the regulations, such a procedure must be carried out every 200 thousand km. Replacement should not be neglected, since there are cases of unexpected circuit breaks. At the same time, there were no symptoms in the engine operation that warned the owner about the critical condition of the part.
Engine tuning
Owners of cars with engines with a power of less than 140 hp. With. can resort to simple chip tuning, which will “free up” about 10-12 hp. With. Physical intervention will be minimal:
- Removing the first oxygen sensor.
- Installing a fake instead of a second CO sensor.
- Installing new firmware on the ECU (Adact-2).
Engines with cast iron liners inside an aluminum block can be improved with “heavy” tuning:
- Grinding of cylinder head channels and intake tract.
- Installation of other camshafts with increased cam lift and larger phases.
- Boring of the exhaust manifold and increasing its cross-section to 53 mm.
- Boring the block and installing larger diameter sleeves.
- ECU flashing.
Moreover, it is even possible to install a supercharger (turbine) and thereby add power to the engine. To do this, the intake and exhaust tracts are modified, the turbine itself is installed, and the ECU firmware is changed. Turbocharging will increase power to 220-250 hp. s., however, the resource will drop significantly.