Location and diagnostics of the starter on Nissan AD

Owners of a popular Japanese station wagon Nissan AD Often faced with a situation where the engine refuses to start. In 90% of cases, the problem lies precisely in the starting system. Find starter on this machine it is not as easy as it seems at first glance, due to the dense layout of the engine compartment and the specific arrangement of attachments. In this article we will analyze in detail where exactly the launch node is located, how to get to it and what nuances need to be taken into account when diagnosing.

Model Nissan AD, especially in the Van or Passenger body, is often equipped with HR or QG series engines. The design of the engine compartment of these units has its own characteristics. You will have to navigate not only according to the instructions, but also visually, since access may be blocked by plastic casings or the exhaust system. Understanding the geometry of the engine compartment is the key to a quick replacement or repair.

Visual inspection and main landmarks

To understand where the starter is located on your Nissan AD, open the hood and stand in front of the car. You need to find the massive power unit and follow it deep into the engine compartment, closer to the cabin bulkhead. The bulk of the starter is usually hidden behind the intake manifold or exhaust pipe, so it may not be immediately visible.

The key guideline is exhaust manifold. On most modifications with a 1.5 or 1.8 liter engine, the starter is attached to the cylinder block directly below it. Often you will see a solid copper wire running from the battery to the starter housing - this is the main power cable. Look for it and you will find the node itself.

Sometimes access to the mounting location is difficult due to the installation of additional elements, such as thermal screens or generator brackets. Do not try to forcefully bend the parts. It is better to use the mirror on the telescopic handle to look under the engine from the radiator side or from below if there is access by a lift.

Specific location depending on the engine

It is important to understand that the location may vary slightly depending on the installed power unit. If you have a model with a motor QG15DE or QG18DE, the starter is located at the bottom of the block, closer to the gearbox. It is secured with two bolts, which are often difficult to access due to the proximity of the subframe.

For series engines HR15DE (newer AD models) the circuit changes. Here the starter is often offset towards the passenger compartment and partially covered by a plastic heat shield. You will have to remove the top plastic engine cover to see the top of the mount. In some cases, it is necessary to unscrew the generator to make room for the tool.

Pay attention to the location bendix - a gear that meshes with the flywheel. On Nissan AD he is looking towards the transmission. If you see a thick wire leading to a cylindrical housing mounted at the base of the motor, this is exactly the assembly you need.

Access to the site and necessary tools

Before you begin dismantling, make sure you have the right set of tools. A standard set of keys may not be suitable due to tight spaces. You will need elongated wrenches, universal joints and, possibly, a ratchet with a 10-12 cm extension. Without them, you simply cannot reach the mounting bolts.

If you are working without a lift, be sure to provide reliable support for the vehicle. Use rolling jack and reliable stands for the body. The starter is located at the bottom, and you will have to work from under the hood or even crawling under the car. It is inconvenient to work alone with a heavy unit; ask someone to back it up.

You will also need a flashlight with a powerful beam, since twilight reigns in the engine compartment. Light up every corner. Sometimes the mounting bolts are coated with a layer of dirt and rust, so treat them first with a penetrating lubricant like WD-40 and let them sit for 15-20 minutes.

Step-by-step removal instructions

Begin work strictly by de-energizing the vehicle. Remove the negative terminal from the battery. This is critical because disconnecting the starter's power wires can cause a short circuit if it accidentally touches the body. Operate only with power off.

The next step is to disconnect the electrical connectors. There are usually two main contacts on the starter housing: a thick power wire and a thin control wire (relay). Carefully unclip the thin wire clamp and unscrew the nut on the thick wire using a 12 or 14 wrench. Move the wires to the side so that they do not interfere with the removal of the assembly.

Now you can move on to the mounting bolts. There are usually two of them: one at the top, the second at the bottom. The top bolt is often accessible from above, while the bottom bolt has to be unscrewed from underneath the car. Be careful, the bolts may be over-tightened. Use a quality tool to avoid stripping the edges.

Once the bolts are removed, carefully pull the starter towards you. It may stick to the block due to thermal expansion. Light rocking will help release it. Do not pull sharply to avoid damaging adjacent pipes or wiring. It is best to remove the assembly through the lower part, lowering it down.

What to do if the starter does not budge?

If the knot is stuck, do not use excessive force. Try gently tapping the housing with a hammer through a wooden spacer to loosen the joint. You can also use a little penetrating lubricant in the gap between the starter and the block, but be careful not to get it on the electrical contacts.

Fault diagnosis and symptoms

How do you know that the problem is in the starter and not in the battery or ignition switch? If you hear a single click when you turn the key, but the engine does not turn, this is a sure sign. The clicking sound indicates that the solenoid relay has activated, but the bendix cannot turn the flywheel.

Another symptom is the engine turning slowly when the battery is working. If you have checked the electrolyte density and voltage at the terminals, and the starter is still sluggish, the brushes or bushings may be worn out. In this case, the unit requires either repair or complete replacement.

Also pay attention to extraneous sounds. A metallic grinding noise during startup may mean that the teeth on the bendix or flywheel are worn out. In such cases, delaying replacement can lead to serious damage to the flywheel, the repair of which will cost much more than replacing the starter.

Features and Compatibility Table

When choosing a new starter, it is important to consider the specifications of your engine. Below is a table with the main parameters for popular modifications Nissan AD. Use this data to select analogues to avoid installation problems.

Engine model	Starter type	Voltage	Power (kW)	Number of teeth
QG15DE	Geared	12V	0.9	107
QG18DE	Geared	12V	1.0	107
HR15DE	Geared	12V	0.85	113
QR20DE	Direct	12V	1.2	113

⚠️ Attention: When installing a starter from a QR20DE engine to a QG15DE, it may be necessary to adapt the mount or replace the flywheel, since the number of teeth and thread pitch may not match.

Installing a new node and checking

Installing a new starter is done in the reverse order. Before tightening the mounting bolts, make sure the spacer (if provided) is level. This is important to prevent oil and dirt from entering the mechanism. Tighten the bolts with a torque wrench to the torque specified in the service book.

Connect the electrical connectors in series: first the thick power wire, then the thin control wire. Make sure the contacts are tight and there are no gaps. Poor contact in the power circuit can cause the terminals to heat up and melt the next time you start up.

Before you return the negative terminal to the battery, check to see if the tool is still under the hood. Install the terminal, turn on the ignition and check the operation of the starter. The engine should start the first time, without any extraneous sounds or vibrations. If everything is in order, replace the plastic covers.

⚠️ Attention: Never try to start the engine for more than 10 seconds at a time. If the engine does not start, let the starter cool for at least 2 minutes to avoid burning the windings.

The nuances of do-it-yourself repairs

If you decide not to replace the entire starter, but to repair it, you will need a disassembled kit. Often the problem is solved by replacing the solenoid relay or brush assembly. To do this, you need to carefully remove the relay cover and unscrew the bolts securing the housing cover.

Carefully inspect the armature commutator. If it is covered with soot or has deep grooves, it must be cleaned with fine sandpaper or turned on a lathe. A dirty commutator is a common cause of poor contact and sparking inside the mechanism.

Check the condition of the bendix. It should move freely along the splines and be securely locked during rotation. If the gear is loose or does not retract, the bendix must be replaced. This is the most loaded element that fails most often.

Is it possible to start the engine with a pushrod?

Yes, this is possible with a manual transmission. However, if the starter is faulty, this is a temporary solution. Constant push starting can damage the clutch and transmission due to sudden jerking.

⚠️ Attention: On Nissan AD models with an automatic transmission, starting the engine from a pusher is strictly prohibited, as this will lead to destruction of the torque converter and gearbox planetary gears.

FAQ: Frequently asked questions

How much does the starter weigh on a Nissan AD?

The weight of the starter varies depending on the engine model, but on average it ranges from 3.5 to 5.5 kg. This is a fairly heavy unit, so it is recommended to use a partner or a safety rope when removing it.

Is it possible to replace the starter without removing the engine protection?

In some cases, if there is sufficient space below, this is possible. However, for most modifications Nissan AD Removing the lower protection (mudguard) is necessary to gain access to the lower mounting bolts and connectors.

What kind of fuel consumption can be caused by a faulty starter?

A faulty starter does not directly affect fuel consumption when driving. However, if it doesn't turn the engine over, you won't be able to start the car. If the starter turns, but the engine runs intermittently, this may indirectly affect the efficiency of fuel combustion.

Where to buy an original starter for Nissan AD?

Original spare parts can be found at official dealers or in specialized Japanese auto parts stores. There are also high-quality analogues from the brands Denso, Bosch or Mitsubishi, which often exceed the original in terms of service life.