Chain on Mitsubishi Lancer 10: replacement, when to change

Lancer 9 1.6 and 2.0 had a timing belt, but for Lancer X the manufacturer has already installed a chain. A chain is more reliable and economical compared to a belt.

Firstly, the schedule for the planned replacement of the chain is 250 thousand mileage, and secondly, it cannot unexpectedly fail (as happened with the belt and this brought a lot of problems), since you will know about problems with the chain in advance by the roar from the under the hood (so still listen to your car).

Of course, the chain can stretch “ahead of schedule,” but not earlier than 150-200 thousand kilometers, and this happens quite rarely.

What you will need to replace the timing chain on a Mitsubishi Lancer X 2.0 (CY4A body):

1) The chain itself - 1140A073

2) Left chain guide - MN183892

and right - MN183893

3) Timing chain tensioner - MN183894

4) There is also an upper chain guide. Not everyone changes it, but it’s still worth changing too. Cars have it until 09.2010

Upper chain guide - 1140A019

This machine has one more circuit - Engine Oil Pump Drive Chain or Balancer Chain. It also needs to be changed. The manufacturer does not write anything about it, so the replacement period is unknown. But by analogy with the timing chain, its resource is also not eternal. It is best to change it together with the timing chain, but first consult with a specialist.

Oil Pump Chain Kit:

1) Engine oil pump drive chain - MN183896

2) Oil pump chain guide - MN183897

3) Oil pump chain tensioner - MN183898

Source: https://all-for-car.blogspot.com/2016/12/mitsubishi-lancer-x-20.html

Design features and purpose

The gas distribution mechanism controls the supply of fuel to the cylinders.
Its operation is impossible without a drive. Modern manufacturers produce systems with chain and belt drives. Many cars have a belt. This product is a closed rubber belt with special teeth on the inside. It passes through several pulleys, but its main purpose is to synchronize the rotation of the camshaft and crankshaft. The use of rubber makes the operation of such a belt almost silent. The high elasticity of rubber can lead to its most unpleasant consequences. If you find the slightest defect, you should urgently change the timing belt.

Required set of spare parts

Replacing a chain, as a rule, is not complete without replacing the accompanying elements of the gas distribution mechanism. Therefore, before starting repairs, it is recommended to purchase:

• tensioner;

• left guide;

• right guide;

• rubber valve cover gasket.

Prices and part numbers vary depending on engine size. The total cost ranges from 3,000 to 4,500 thousand rubles.

If the service life of the filled lubricant is coming to an end, it is recommended to change the engine oil after completing the replacement of the timing chain.

Why is a broken belt dangerous?

It would seem like an ordinary piece of rubber, what serious thing could happen if it breaks? But we must not forget that this element ensures the coordinated operation of the camshaft and crankshaft. During a break, the crankshaft continues to rotate, but the torque is no longer transmitted to the camshaft. This causes the cylinders to hit the valves.

What are the consequences? Starting from bent cylinders and ending with the complete destruction of a group of valves. Such repairs will cost you a large sum, and all because of that very “piece of rubber”. Therefore, replacing the timing belt is a mandatory step that will prevent waste in the future.

Motor reliability

This unit does not have very good reliability indicators and requires special attention during the entire period of operation. Even cars that have just rolled off the production line are sometimes characterized by increased oil consumption in large quantities. Violation of regulated maintenance is guaranteed to lead to increased wear of the cylinder-piston group and other elements. In the future, this will lead to the following consequences: the appearance of oil in the spark plug wells, the piston rings may become stuck, and the connecting rod bearings and main bearings may rotate, since the engine oil is not distributed correctly due to wear of the cylinder-piston group.

The designers installed a chain in the gas distribution mechanism. This is a good solution because it gives greater reliability to the engine. The removal and installation of the timing chain must be carried out by highly qualified specialists, since incorrect installation of the chain can lead to serious problems, even to the point of requiring expensive engine repairs.

The main causes of breakage: how to avoid it

One of the frequently asked questions regarding the timing belt is why it breaks. This includes:

• wear and tear directly due to long-term use or poor quality of the product;
• the pump or rollers are jammed;
• a breakdown occurred and the camshaft “caught” a wedge;
• The crankshaft is jammed.

The best way to solve a problem is not to create a problem for yourself, so we recommend that you familiarize yourself with the basic rules that will help you avoid such a breakdown:

• The belt must be replaced on time (every 40-50 thousand kilometers);
• regularly check the seals for leaks;
• if you are replacing timing components, use only high-quality parts;
• check the belt tension. Its slippage can also cause damage to valves and cylinders;
• check the integrity of the water pump and rollers.

These tips will help you avoid the problems described above.

who changed the timing chain? :: Mitsubishi Lancer X. All about Mitsubishi Lancer 10

Lancer X 4A91 timing marks

Care during assembly and even greater care during assembly. First you need to remove all engine attachments and turn off all sensors. Well, if someday the oil gluttony repeats itself, we already know what to expect from the engine; we no longer have illusions about the luminaries of engineering from the Land of the Rising Sun; we no longer harbor their seal of the Emperor and what we should prepare for during repairs.

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The oil scraper rings are completely stuck and clogged with coke in the grooves.

The oil scraper rings are completely stuck and clogged with coke in the grooves. The wiring is of high quality, the connectors are very tight, waterproof and difficult to remove. The restless Japs, after two years of production of the 4A91 engine, modernized it and replaced the valve stem seals with option 1.

A visual inspection of the components reveals sagging of the chain, visible damage, damage to the integrity of the links, wear and abrasion of the teeth. The appearance of any of these symptoms is a reason to contact a specialist.

They are able to carry out competent repair of the Mitsubishi Lancer 10 timing belt and replace all worn and deformed components. Our service will offer you a professional comprehensive service, including diagnostics, the repair itself and adjustment of the tension level of the new component.

Often, the chain replacement procedure only involves replacing the tensioners, the chain itself does not change.

It should be regularly tightened, as it wears out, but, I repeat, until the chain completely fails, the car can be driven and driven.

Another interesting fact: This again speaks to the reliability of this part and the fact that the manufacturers, speaking about thousands of kilometers without replacement, did not exaggerate at all.

If it did happen that you heard a very unpleasant rumble from under the hood and realized that the Mitsubishi Lancer X timing chain needs to be repaired or replaced, then there are two options: A repair kit, including a chain, guide and shoe, will cost approximately four thousand rubles.

That's right, improve it, make it even more reliable. Which, in fact, happened with every new Lancer. Each time, Japanese designers found something to surprise and delight fans of this series.

Time after time, the Japanese sports car became better, faster and more reliable. Now we will look at one important detail that has undergone a change, and a very important one at that.

Parts and consumables:

We are talking about the timing belt, which in the tenth Lancer was replaced with a chain. In general, assembly of the motor was quick - easy access, the motor is relatively simple.

The oil was filled with Elf 5W30, the engine started easily and began to work quietly. The client noted that the engine began to run smoother. All engine repairs Mitsubishi Lancer X 4A91, 1.

Engine 4B10 1.8 Mitsubishi Lancer 10 (6)

The car is in plain sight, the client drives a lot, and all statistics will be published in this article in the future.

Well, if someday the oil gluttony happens again, we already know what to expect from the engine; we no longer have illusions about the luminaries of engineering from the Land of the Rising Sun and their seal of the Emperor, and what we should prepare for during repairs. I suggest the reader also watch videos filmed during the repair of the Mitsubishi Lancer X 4A91, 1 engine.

Update from July 5th Several months have passed, it is possible to sum up some results of the Mitsubishi engine repair. The client, of course, did not sell the car; he drives it every day. Since the repair, it has covered several thousand kilometers, the oil level does not change, and oil consumption has been completely eliminated.

A few weeks after the repair, the car came to replace the graphite ring of the exhaust manifold. This ring is the weak point of Lancers; with its destruction, exhaust noise appears and during intense acceleration the ring begins to cut.

The next photo shows an old burnt-out ring and a new one - I had to order an original one, at a price of about rubles.

Replacing the ring does not present any difficulties, but the nuts and bolts must be coated with copper paste before tightening to avoid further sticking.

Otherwise, the client is completely satisfied with the repairs performed and continues to use the car. Update from August 15th The mileage on the odometer is thousands of km. The oil began to leak again, but it was not the rings that were to blame - during an inspection on the lift, they discovered a leak in the front oil seal!

Let's talk a little about the Lancer 10 timing chain

He was squeezed out of his seat. The oil seal was replaced with a new original and, just to be sure, it was glued onto Loctite; the seal’s fit in the socket was weak; at the same time, the oil was changed; the time had come.

At the same time, we checked the spark plugs - the insulators were clean, with no traces of oil burnt. At the beginning of the article there is a photo of a spark plug with loose carbon deposits, before replacing the rings. Author of the article, photo and video materials: Tired of paying fines? Forget about fines from cameras! Absolutely legal article Installs yourself in 2 minutes.

Invisible to the human eye, does not deteriorate due to weather.

Source: https://diabloarea.ru/ford-fokus/kak-pomenyat-cep-na-mitsubisi-lans.html

Generator belt

Along with the timing belt is such an important component as the alternator belt on the Mitsubishi Lancer. This part is a closed rubber ring, but slightly smaller and thinner in comparison with the timing belt. The main task is to rotate the generator shaft and charge the battery.

Breaking this belt is not such a critical problem. When you drive, your battery will stop charging. With the remaining charge, you can always take it to a garage or auto repair shop, and then simply make a replacement.

How to choose an alternator belt for Mitsubishi Lancer 9 and 10? There is only one piece of advice here - don’t save money, but order a quality product. A cheap belt will stretch and break very quickly. As a result, you will still have to buy a new belt, but this time it will be a good one. When purchasing, pay attention to the inscriptions and markings. If they are printed crookedly or blurry, then most likely you are looking at a fake.

Maintainability and maintenance

In general, the engine is very simple and compact in size. This allows you to carry out repair work even in a garage environment. However, spare parts, their availability and price, if the main elements break down, forces the owner to replace the entire engine with a contract unit. Most often, in monetary terms, this replacement costs the owner less than purchasing a large set of spare parts to be replaced.

After repair work has been carried out on the engine, it is necessary to configure it for correct operation. Engines with a DOHC system have their own distinctive features in valve adjustment. The fuel consumption, as well as engine compression, depend on the correct setting, as a result of which you can notice a deterioration in the dynamic acceleration qualities of the car. Pistons and piston rings are supplied to the Mitsubishi automaker by Teikin and TP - Teikoku Piston.

The ignition system and attachments are reliable elements in the 4a91 engine. It is necessary to replace spark plugs on time, since the power plant is very sensitive to the quality of the spark. The data written in the book on maintenance and repair of engines from the 4a9 series indicates the need to replace spark plugs every 10,000 km, regardless of their condition. Also, the manufacturer of these motors recommends paying attention to the tightening torques of all engine connections, since the internal combustion engine contains many associated elements that operate under high loads.

The drive of the gas distribution mechanism is shown in the figure

1 - Tension shoe; 2 - Exhaust valve gear; 3 - Exhaust valve gear; 4 — Chain damper; 5 - Crankshaft gear; 6 - Timing drive chain; 7 - Chain tensioner; a,b,c,d,e – Timing chain marks

Replacing the timing belt on Mitsubishi Lancer 9 and 10

So, if you were unable to avoid the belt breaking, you should replace it. But don’t rush to contact the service center. This procedure will not cause any difficulties. To do this you will need a couple of wrenches and screwdrivers.

To remove the timing belt, follow these steps:

1. Remove the right front wheel. Also, do not forget to place boards under the spar.
2. Loosen the bolts on the compressor and generator, then remove the belts.
3. Remove the right engine mount.
4. Remove the protective cover in the wheel arch.
5. Unscrew the crankshaft pulley.
6. Remove the upper timing belt guard. It is secured with three bolts. Use the key to 10.

7. Remove the pulley from the pump. It is secured with four bolts. Use a 10mm socket.
8. Remove the lower timing belt guard.
9. Next you need to set the tags. To do this, put the gearbox in fifth gear, and then rotate the wheel clockwise. The mark on the wheel must match the special mark on the engine. Similar marks on the crankshaft should also match.
10. Using pliers, beat off the tensioner spring, and then remove the roller itself.

11. Now you can remove the timing belt.

Attention! After dismantling, do not rotate the camshaft or crankshaft! After this, you can replace the tension roller and install a new belt and spring. After tightening the central bolt of the roller, it is necessary to reassemble in the reverse order.

This instruction will save you several thousand rubles on repairs. All your expenses will be reduced only to the purchase of a new belt. The whole process takes from half an hour to several hours.

Required Tools

In order to replace the timing chain on Lancer 10, you will need the tools shown in the table below.

Tuning

The problem with upgrading the 4a91 engine is that it is ideally tuned by the factory to meet all the declared indicators of dynamism and efficiency. Any intervention in the integral design of the engine installation will lead to less than ideal engine operation, as well as a possible increase in the consumption of lubricating and fuel fluids. The most common type of tuning of any engine from the 4a9 series is changing the readings and flashing the electronic control unit. It is tuned so that fuel economy and dynamic performance indicators correspond to the declared indicators. If you set it for maximum fuel economy, the dynamic qualities of the car will decrease significantly. The advantage of the ECU installed on these engines is that returning to factory settings is very simple.

Source

Specifications

The 4a91 engine unit is one of three representatives of the 4a engine line. The volume of its working cylinders is 1499 cubic centimeters. Depending on the vehicle on which the 4a9 is installed, it is capable of developing power from 102 to 109 hp. The approximate lifespan of the engine, which it can cover without major repairs, ranges from 80,000 to 150,000 km, depending on the loads on the engine and the quality of the lubricants and fuel fluids used. Its operation is based on the DOHC system. Engines with this system have two camshafts, 4 cylinders, and 16 valves.

The location of the camshaft is on top of each row of intake and exhaust valves. This engine has no rocker arms, rods or rockers. To significantly reduce loads and better combustion of the fuel-air mixture attributable to the springs, these engines install four lightweight valves per cylinder, instead of two, heavier valves. This also led to the fact that, thanks to two valves with a small diameter at the inlet, 50% more fuel enters the cylinder than through one valve of a larger diameter.

It also contains a system that allows you to change the phases of gas distribution. Engines with this mechanism have higher economic indicators and efficiency compared to other naturally-aspirated engines of the previous generation. The power unit number is located on the surface of the front part of the cylinder block, near the location of the hydraulic power steering pump.

Summary table of technical characteristics of internal combustion engine 4a91