Do-it-yourself turbine repair Mazda SH7

MAZDA CX-7. REMOVAL AND INSTALLATION OF THE TURBOCHARGER ENGINE 2.3 L

You will need: keys "14", "15", a flat-blade screwdriver and pliers.

1. Remove the decorative engine cover (see "Removing and installing the decorative engine cover", page 70).

2. Remove the charge air cooler (see "Removal and installation of the charge air cooler", page 119).

3. Loosen the clamp securing the air outlet hose and disconnect the hose from the turbocharger pipe.

4. Remove the air filter (see "Removing and installing the air filter", page 119).

5. Disconnect one end of the crankcase ventilation tube from the cylinder head cover fitting.

6. Disconnect the other end from the air supply hose in the same way and remove the crankcase ventilation pipe.

7. Loosen the clamp of the air supply hose.

eight. . and detach the sleeve from the nipple.

9. Remove the engine crankcase protection

(see "Removing and installing a mudguard and engine crankcase protection", page 73).

10, Remove the five mounting bolts.

eleven. . and remove the upper exhaust manifold heat shield.

12. Remove the three mounting bolts.

thirteen. . and remove the turbocharger turbine heat shield.

15. . and remove the catalytic converter heat shield.

16. Loosen the clamp of the charging solenoid valve hose by squeezing its bent ears with pliers, slide the clamp along the hose.

17.. and disconnect the hose from the air duct fitting.

18. Remove the mounting bolt.

19. Loosen the clamp securing the air duct to the turbocharger.

twenty. . and disconnect the air line from the turbocharger.

21. Loosen the clamp of the second hose of the boost solenoid valve by squeezing its bent ears with pliers, slide the clamp along the hose and disconnect the hose from the boost solenoid valve.

The Mazda CX 7 is a single-generation mid-size crossover made in Japan in 2011. The car was produced in two versions - all-wheel drive and front-wheel drive. The production of this model ceased in 2012.

External features of Mazda cars CX7:

• The radiator grille is pentagonal, wide, not like a big smile.
• The design of the car is made in a sporty style.
• A-pillars with a 66% inclination.
• Wheel arches are wide.
• The disks are big.
• Roof spoiler.
• The car interior is stylish, elegant, trimmed with light leather.
• The steering wheel has three spokes.
• The steering wheel is covered with leather.

The oven in the car heats up very quickly - after 2, maximum 3 minutes. The salon has many compartments and drawers for various little things, a large glove compartment, a shelf for keys or a wallet.

The seat remembers the settings and if the crossover is used by several drivers, then everyone can easily customize the driver's seat for themselves.

The gearbox in this car model is automatic, but it is possible to manually switch gears. The engine runs on gasoline.

The maximum speed that the Mazda CX7 can develop is 181 kilometers per hour. Acceleration to 100 km / h occurs in 8.3 - 10.3 seconds.

This model consumes an average of 11.5 liters of fuel per 100 km.

The trunk of a car is quite large and you can carry quite large loads in it. In addition, the volume of the luggage compartment can be increased by folding the rear passenger seats. The transformation is quite easy, just pull the side levers.

According to its parameters, the crossover is suitable for driving on bad roads and for overcoming various obstacles. But at its core, the car does not handle off-road well.A front-wheel drive model with a less powerful engine will not allow you to overcome off-road at all.

The safety level of the car is approximately 76-79%. The package includes front and side airbags, power mirrors, foglights, a navigator and so on.

The pluses include the following indicators:

• Convenience - Plenty of legroom for rear seat passengers.
• Good stability at high speeds.
• Side mirrors are comfortable and large.

Cons of the model:

• Not a very comfortable camera.
• High fuel consumption. On average, this is 10-11 liters per 100 km in cool weather on the highway and 16-17 (and even 19) liters per 100 km in summer in the heat on city streets.

Sooner or later, the turbine requires repair and either partial or complete replacement of components. If you regularly use maintenance services, then the breakdown will happen a little later, but it will still happen, since any mechanism wears out.

The turbine is one of the most frequently damaged machine systems.

When the mileage of a car reaches 120,000 kilometers or more, the owners are forced to contact a car service with a similar problem. The main cause of turbine malfunctions is the wear of its components, most often oil seals, blower, bearings. Rapid wear is the owner's fault. It occurs due to the untimely replacement of the lubricant, due to the fact that cheap and low-quality oil is used.

Replacing a turbine is not a cheap service and it is much more profitable to take good care of your car.

Features of turbine repair at Mazda CX7:

1. First, experts prepare a set of tools.
2. Further, the intercooler is removed from the unit.
3. After that, the rubber pipes are dismantled.
4. Further, the heat insulator and the pipe with oil are removed from the car.
5. Now the turbine itself is removed.
6. Then this part is installed on a specially designed stand.
7. Diagnostics and testing are carried out.
8. Further, the master makes a decision - to repair the unit or it is enough to carry out preventive work.

Or call for repair
in St. Petersburg: +7 (931) 961-51-61
in Moscow time: +7 (965) 203-09-90
It is important to contact on time - inaction increases the cost of any repair.

After the specialist has concluded what needs to be done, either prevention or replacement is performed.

The main thing is to carry out all operations very carefully so as not to break anything, and in the right order - a clear sequence of actions plays a big role here. It is also important not to lose parts; for this, specialists put them all in special containers.

It is strictly forbidden to carry out preventive maintenance if there is damage to the integrity of the unit, cracks, seizures. In this case, only a complete replacement of the unit is made.

It is important to remember that only professionals can perform turbine diagnostics and repairs, you should not try to do something yourself.

There are some symptoms by which the car owner can understand that the old unit is failing and will soon have to be repaired or purchase a new one:

• Beige smoke comes out of the exhaust system.
• The car smokes both during the trip and at idle.
• There is a burning smell inside the cabin.
• The machine starts to consume grease quickly.
• The car can emit a hum, rattle.

TOto drink the turbine on the Mazda CX7 can be both original and analog. It is also possible to purchase a new turbine, used or rebuilt. The model should be selected based on the recommendations of the manufacturer, since not every modification will fit the Mazda CX7.

If the owner decided to purchase a new turbine, one should take into account the fact that gaskets may not always be included in the kit, they will need to be purchased additionally.

The restored turbine is a unit in which only the body remains old, and the entire filling will be new. Often, such a part can be of better quality than a factory one.

A used turbine will cost less than the previous options, but the owner installs it at his own peril and risk. Firstly, there is no way to find out what the mileage of the car from which it was charged is. There is a risk that such a turbine will simply not work after installation.

Do you have an old mazda cx7 turbine that is out of order? Bring it to us and get a guaranteed discount from 1500 to 2500 rubles!

• Our specialist will check the damage to your old turbocharger;
• Based on the damage, we will formulate a discount for you;
• It is guaranteed that you will receive a discount from 1500 to 2500 rubles .. depending on the technical condition of the old turbocharger.

Thanks to this special offer, you can order a turbocharger from us at the lowest price in Russia!

Aspirin, Bosal nuts are suitable if you want to save money, but they are from the exhaust system and do not have a thread clamp, they need to be squeezed a little in a vice.
The studs fit from the GAZ exhaust manifold, but they are 7 mm longer, they must be cut, in some places sticking out are inconvenient.

It is not worth saving on catalyst and turbine gaskets, IMHO, I helped a friend change the turbine, the jammed turbine gasket (he put the Spanish analogue, in my opinion it is called Ajusa, if memory serves) started to pass, had to be changed to the original.

Here is a comparison of the original nuts to Bosal (not in favor of the latter)

Here are the original 2pcs studs. and GAS.

There is also on the market, I wrote in general about the non-original. the experience of use interests. suddenly weaken, break, etc. I'm certainly not a specialist in materials science, but still the place is hot.

I agree with this completely. There were cases before. cars

And maybe someone will tell you where to change the turbine in Kazan? I went to the officials, and something was disappointed. I wanted to measure the oil pressure and compression - they could not screw in the pressure gauge (there was no adapter for our engine) and the compressor meter turned out to be faulty

Aspirin, [Links are available only to registered users. Register here. ]

Added after 1 minute 17 seconds
Aspirin, nuts with studs, of course, you can take not the original, but the gaskets, of course, are only orig

Added after 13 minutes 1 second
if the turbine changes service, then be sure to check the flushing of the oil lines coming to the turbine, the inlet tube must be flushed by turning the engine with the starter so that the oil pump itself squeezes out all the slag from the tube!

Replacing the turbocharger cartridge does not require special equipment and technical knowledge, so this type of repair can be performed both in a specialized service and on your own.

Before proceeding with the replacement of the cartridge, it is necessary to diagnose the engine and establish the cause of the failure of your turbine.

The most common causes of turbocharger breakdown on a Mazda CX-7 car are:

Turbocharger oil starvation. As a rule, the causes of oil starvation are:

insufficient pressure in the oil circulation system (it is necessary to check the oil pump),
narrowing or clogging of oil channels (occurs when coking oil in the oil supply line, or when foreign objects and impurities get into the oil).

Foreign objects entering the turbocharger. Even very small particles entering the turbine can damage it.

The most dangerous for a turbocharger are abrasive particles and dirt in the oil. Contaminated oil leads to deposits on the walls of the oil supply line, which leads to a decrease in its capacity, and as a result, to damage to the turbocharger. Abrasive particles entering the inside of the turbocharger lead to the development of sliding parts, which also inevitably leads to a malfunction of the turbine. It is strongly not recommended to install a new turbocharger immediately after repairing the engine piston group (for example, when replacing piston rings).Lapping these parts entails the ingress of metal dust into the engine oil, which, when it enters the oil channels of the turbine, “breaks” the bushings and the turbine begins to “drive” the oil. Very often, car owners perceive this as a turbocharger defect, because “the turbine is new and the engine has just been repaired”, it would seem that there’s nowhere to wait for a catch, but this is not the case.

The ingress of solid particles into the impellers of a turbocharger can lead to breakage of the blades, the appearance of extraneous sounds from the side of this unit, in the worst case, to jamming of the impellers and damage to the turbocharger.

Defective crankcase ventilation system. When replacing a turbine with a CX-7, a mandatory item is to check the performance of the crankcase ventilation system. It is highly recommended to replace the filter element when doing this.
Overheating of the turbocharger. It is not uncommon for the cast iron part of the turbocharger to crack from the increased temperature inside the turbocharger. This is due rather to the design features of the car than to the turbine itself.

Required tools and materials:

Wrenches 10 and 12 (better box type)
Pliers
Hammer
Heat resistant sealant
Rags
Solvent or other carbon removal chemicals

Remove the clamp connecting the cartridge to the hot part of the turbine.

2. Disconnect the actuator by unscrewing 2 screws.

3. Unscrew the screws on the compressor housing (cold snail) that hold the cartridge.

4. We take out the cartridge from the turbine housing (hot snail) together with the compressor housing.

5. We take out the cartridge from the compressor housing. If you cannot pull it out by hand, you can lightly hit the top of the cartridge with a hammer and it will fall out - you will no longer need this cartridge.

6. To seal the cartridge inside a cold snail, a rubber ring is usually used, or a sealant (as in this case - red traces of sealant on the snail and cartridge), during assembly, you will also need to apply sealant to the compressor casing). IMPORTANT! Sealant should not be applied to any other parts categorically! Hot and cold turbine volutes should be cleaned and inspected for cracks in the housing. Particular attention should be paid to the pressure relief valve (bypass) on the hot part of the turbocharger - check that it fits snugly against the turbine housing and does not have burnouts. For cleaning, you can use gasoline, kerosene, carburetor cleaner and other chemicals.

7. After cleaning and inspecting the housings, you can proceed to assembly in the same manner. The hot end has a guide pin that needs to be aligned with the corresponding hole on the cartridge.

Sooner or later, almost every Mazda CX 7 owner is faced with the need to repair or completely replace the turbine. Before starting work, you have to make a choice: restore the existing unit, buy a used one, or buy a completely new one. As practice has shown, the most reliable and ultimately the most economical option is the latter, while the risk of starting to replace the turbine again soon is minimal. If you have the time and desire, this procedure can be done by hand.

On the forums, you can find dozens of ways to "check" a turbine, but it is simply impossible to exclude the possibility of its sudden failure. As a rule, most of the proposed checks are completely ineffective, and the most reliable way is to carefully monitor the behavior of the car. The main and most obvious signs of the imminent "death" of the turbine unit are:

• Thick black or light smoke from the chimney, especially at idle
• The smell of burning oil inside the car, which does not disappear after changing the oil directly
• A sharp increase in oil consumption up to 1 liter per 500 kilometers
• A sharp hum with a hiss during acceleration, which disappears after an incomprehensible impact, accompanied by a grinding noise.

If these frightening symptoms have already appeared, do not delay diagnostics and, if necessary, replace the turbine. Moreover, it is the replacement, not restoration, that is recommended.

First of all, you need to stock up on all the necessary little things, namely:

• Pipe gaskets
• Hairpins
• Bolts of the correct size
• Oil pipe and gaskets for it
• Engine oil
• Oil filter
• Air filter.

The access to the unit is the most convenient - from the top, where the exhaust manifold is located. From below, you just need to drain the oil and change the filter insert. This completes the work in this part of the car.

The first step is dismantling. Remove the intercooler lining, which is a plastic cover with several clips. You need to try not to break the clips, so as not to engage in their replacement. Then we remove the intercooler itself by carefully unscrewing all three bolts. In doing so, it is important not to lose the bushings. We loosen the clamps on the pipes and remove them. In total, you need to dismantle 4 pipes: the turbine itself, the air valve and the intake manifold.

Replacing the Mazda CX 7 turbine with your own hands is a simple matter, but long and laborious, you will have to disassemble a lot. After the intercooler, remove the heat insulator, which is attached with 8 bolts. If the process is not progressing, it is best to use a rust remover of any type. The next in line is a bracket that interferes with further work, the remaining pipe with oil. By touch, you need to find the lower casing, which is fastened with three bolts, standard by 8. All this is also dismantled. We get to the lambda probe on the catalyst. Here it is necessary to remove the next casing, already from the catalyst itself (3 bolts), this facilitates access to the tightening pins.

Next, we go directly to the turbine. We remove the casing from it, the first of the three bolts is easy to find, we are looking for the rest around the perimeter. The aforementioned four studs can now be removed. They are designed to tighten the catalyst and turbine, so we handle the mount carefully. Access to the engine manifold is opened. We unscrew all ten nuts from it, remove the device. The next step is to remove the poles and tubes from the solenoid or pneumatic valve. The main task at this stage is not to break the pipes, we will put them back.

One of the most difficult parts of the job is dismantling the entire intake air system. We shoot everything that is here one by one. Problems can arise with the ventilation of the engine, since it sits quite tightly. The last step is to remove all tubes to the turbine. These are two pipes with antifreeze (they are on the sides), two oil pipes (top and bottom). This is the most time-consuming step, since half of the steps are performed blindly. All that remains is to remove the bracket, which is attached to both the engine and the turbine. The bolts here most often stick well, therefore, sparing our engine, we act carefully. And only one bolt will remain: we are looking for the article number of the turbine, the manufacturer's engraving and other designations, right under this place there will be the last fastener that must be unscrewed.

Finally, the turbine can be removed. The rigid tubes around can neither be moved nor removed, so we turn the unit if necessary and carefully remove it without haste. All that remains is to install a new turbine and repeat all steps in reverse order. In the process of reassembling, we change all the gaskets, it is more convenient to do this right now than to disassemble everything again later. It is also better to replace the necessary consumables immediately.

Ratchet wrenches can help ease this difficult process. When dismantling, it is convenient to fold all the bolts and nuts directly onto the casing. They look almost the same, but the length may vary and the confusion will be unimaginable during assembly.

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onix »Thu Aug 06, 2015 15:58

CX-7 was brought to us on a tow truck, the client complains of a loss of power, thick smoke from the chimney and abnormal engine operation.
When you try to start, the engine starts up, thick white smoke is pouring out of the exhaust pipe. Immediately turn off and, first of all, check the oil level. We take out the dipstick and see the same thick white smoke escaping from the hole for the dipstick - a bad sign.
As a result, the dipstick is dry, there is no oil in the engine.

We check the turbine, oil just flows from it in a stream. Upon closer inspection, it becomes clear that the bearings of the turbine shaft collapsed, which, in turn, led to oil leakage and destruction of the turbine impeller.

The forecasts are not very encouraging, that changing the turbine is understandable right away, but there are great suspicions that the engine, having worked for some time in the mode of strong oil starvation, is also damaged, + fragments of broken turbine blades definitely got into the engine. We will remove and disassemble the motor, and then we will see.
To be continued .

Nagornaya: 8 (495) 234-72-83, 8 (495) 737-99-39
Tushino: 8 (495) 669-57-43, 8 (495) 669-55-40
Body: 8-926-112-67-67

onix »Thu Aug 06, 2015 21:17

We will deal with the motor after the weekend.

Nagornaya: 8 (495) 234-72-83, 8 (495) 737-99-39
Tushino: 8 (495) 669-57-43, 8 (495) 669-55-40
Body: 8-926-112-67-67

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For three years, I ran 90,000 on the cx-7, and have never been in the service. And I go, and in the tail and in the mane) Japanese quality probably. True, I took it with a changed turbine

It’s as if it’s broken, the mb wasn’t warmed up, so it spits out the oil.

it may not be in the turbine, but an elementary clogged breather, it was just horror on my Audi allroad after launch, while I drove from Kutuzovsky to work, 4 liters flowed into the pipe, it just leaked out. but it’s easy to check, he started the engine, he worked well, drowned it for 2 minutes and open the filler cap, if you hear a hiss, then the crankcase ventilation is clogged, or the breather tube is frozen over in winter, this is important.

cx7 has a sore, turbine breakdown up to 50 t. km of run

cx7 is generally a wreck, my uncle bought it, after 20 thousand I changed the front levers, how fucking “cheap” they are. generally Mazda is shit.

Mazda cc 7. how to check turbine?

This car became very popular in Russia even before the turbo version was introduced. Today, the turbocharged crossover is breaking all sales records despite the crisis.

However, there are common problems with which, sooner or later, almost all owners of the model in question. The cost of replacing a Mazda CX 7 turbocharger depends on the service center. Although the high cost of work does not always mean the same high quality.

The fact is that thanks to the use of a turbocharger, it is a real possibility to burn fuel much more efficiently. This means that the engine power will increase in a certain way.

Undoubtedly, the appearance of this equipment under the hood implies the presence of additional technical devices. After all, the turbocharger can reach high temperatures during operation.

However, the absence of any complex configurations in the design provides a fairly high resource. And the premature rejection of this can only be explained by the wrong work.