Timing marks on Nissan March AK12: complete guide with photos and diagrams

Replacing the timing belt with Nissan March AK12 is a critical procedure that many owners put off until the last minute. But in vain: the belt breaks on this engine (CR14DE or HR15DE, depending on the year of manufacture) is almost guaranteed to lead to bending of the valves and major repairs. But even if you don't plan to change the belt yourself, understand how set the timing marks correctly, every owner should. A mistake of just one tooth can have disastrous consequences.

In this article we will analyze not only the standard replacement procedure, but also typical errors when placing labels, which even experienced masters admit. You will learn how to check the match of marks without special tools, which AK12 engines with automatic transmission have hidden nuances, and why sometimes even a new belt can slip. The material is based on manuals Nissan, experience of service centers and owner reports from forums Drive2 And Nissan-Club.ru.

1. What engines does the Nissan March AK12 have and their timing features

Model Nissan March AK12 (2002–2010) was equipped with two main types of engines, which differ fundamentally in the design of the gas distribution mechanism:

• 🔧 CR14DE (1.4 l, 88 hp) - the most common option. Has single camshaft (SOHC) and hydraulic compensators, which simplifies the adjustment of gaps. The timing belt here serves on average 80–100 thousand km, but with aggressive driving or high loads it may crack after 60 thousand km.
• 🔥 HR15DE (1.5 l, 109 hp) - more powerful and modern engine with double camshaft (DOHC). Here no hydraulic compensators, so when replacing the belt, be sure to check the valve clearances. Feature: the marks on the pulleys are less noticeable and can be easily missed during inspection.

Important: both engines use interference design - this means that if the belt breaks, the pistons will hit the valves. B 90% of cases this leads to bent valves and damage to the cylinder head. Therefore Nissan recommends checking the condition of the belt every 40 thousand km, even if it is not yet worn out.

One more nuance: on March AK12 with automatic transmission (CVT or 4-speed automatic), the crankshaft marks may move when the shaft is rotated manually due to transmission resistance. This is often forgotten, resulting in incorrect belt installation.

2. Where are the timing marks on the Nissan March AK12: photos and diagrams

Timing marks on Nissan March AK12 located on three main elements:

1. Crankshaft — a mark on the pulley (looks like a small dot or mark). Compatible with the indicator on the oil pump.
2. Camshaft(s) - on CR14DE one mark on HR15DE two (one for each shaft). Aligns with the protrusions on the rear timing cover.
3. Flywheel — additional mark in the gearbox hatch (often ignored, but critical for accurate installation).

Below is a diagram for CR14DE (most common option):

element	Label appearance	What does it combine with?	Photo/description
Crankshaft	Point or mark on the pulley	Pointer on the oil pump (lower timing cover)	The mark should be exactly opposite the protrusion. On some models, instead of a dot there is a small depression.
Camshaft (CR14DE)	Triangular protrusion on gear	Protrusion on the rear timing cover (top)	When positioned correctly, the lug on the gear faces up and to the side.
Flywheel	Mark on flywheel	Window in the gearbox hatch	Visible only when the box is removed or through a special window (access is difficult on automatic transmissions).

⚠️ Attention: On engines HR15DE The marks on the camshafts are often confused. The left mark (on the cylinder head side) is responsible for intake shaft, right - for graduation. If you mix it up, the engine will run erratically or won't start at all.

How to check the timing marks without removing the timing cover?

On a CR14DE engine, you can approximately check the position of the marks by rotating the crankshaft by the pulley bolt (clockwise) and observing the movement of the valves through the spark plug hole. If, when the crankshaft marks coincide, both valves of the 1st cylinder are closed, the camshaft marks are most likely correct. However, this method is not accurate and is only suitable for preliminary diagnosis.

3. Step-by-step instructions: how to set timing marks on a Nissan March AK12

Before starting work, make sure you have:

• 🔧 A set of sockets and keys (necessarily the head on 19 mm for the crankshaft bolt).
• 🔍 Flashlight or lamp to illuminate the marks.
• 📏 Caliper or ruler to check belt tension.
• 🔄 A special key for the tension roller (can be made from an old socket wrench).

Step 1. Installing the piston of the 1st cylinder at TDC.

1. Remove the right front wheel and plastic mudguard.
2. Unscrew the crankshaft pulley bolt (you will need the help of a second person to lock the flywheel or use an air impact wrench).
3. Rotate the crankshaft clockwise until the mark on the pulley matches the pointer on the oil pump.
4. Check the position of the mark on the flywheel through the hatch in the box (the mark should be visible opposite the window).

Step 2: Checking the camshaft marks.

On CR14DE The mark on the camshaft gear should face up and align with the protrusion on the rear cover. On HR15DE both marks (intake and exhaust shafts) must be directed towards each other and coincide with the protrusions.

⚠️ Attention: If the camshaft marks do not match, don't try to rotate them separately - this can damage the valves. Instead, remove the belt and carefully tighten the shafts by hand.

Step 3. Replacing the belt and tension pulley.

• Loosen the tension pulley bolt and remove the old belt.
• Install a new roller (original recommended Nissan 13028-4M50A or equivalent Gates T42028).
• Install the new belt starting with the crankshaft, then the camshaft(s) and pump. Follow the direction of the arrows on the belt!
• Tension the belt using a roller (correct tension - deflection 5–7 mm when pressing with a finger between the camshaft and crankshaft).

4. Typical mistakes when replacing a timing belt and how to avoid them

Even experienced craftsmen sometimes make mistakes that lead to belt slippage or incorrect engine operation. Here are the most common:

• ⚠️ Flywheel marks mismatch. Many people ignore checking the mark in the box hatch, relying only on the crankshaft pulley. This leads to a phase shift of 180° - the engine will work, but intermittently.
• ⚠️ Belt that is too tight or too tight. Too much tension accelerates wear on the pump bearings and rollers, while too little tension leads to slippage. Check the tension with a dynamometer (force 2–2.5 kg for deflection by 5 mm).
• ⚠️ Use of non-original videos. Cheap analogues (for example, NoName or Febi) often have play, which causes the belt to “walk”. Better to overpay for Gates or NTN.
• ⚠️ Reusing an old tension roller. Even if it looks fine, its spring may have weakened. Always change the roller together with the belt!

Another common problem is incorrect pump installation. If its seat is not cleared of the old gasket or sealant, the pump will stand crooked and the belt will warp. Signs:

• Belt whistling when cold.
• Uneven belt wear on one side.
• Antifreeze leaking from under the pump.

5. How to check whether the timing marks are set correctly after replacement

Even if you have carefully aligned all the marks, you still need to complete control check. Here's how to do it:

1. Manual check:
   • Make sure all marks match.
   • Turn the crankshaft to 2 full turns clockwise.
   • Check that the marks match again. If at least one mark is gone, the procedure must be repeated.
2. Compression test:
   • Unscrew all spark plugs.
   • Rotate the crankshaft and watch the movement of the pistons (you can through the spark plug holes).
   • At TDC, both valves of cylinder 1 must be closed. If one of them is slightly open, the marks are knocked down.
3. Checking the engine operation:
   • After assembly, start the engine and listen to its operation.
   • Normal: smooth idle without vibrations, no errors P0340 (camshaft position sensor) or P0335 (crankshaft sensor).
   • Signs of an error: the engine stalls, it doesn’t start well, the dashboard lights up Check Engine.

⚠️ Attention: If after replacing the belt the engine does not start or runs unstably, don't try to get used to it. Most likely, the marks are knocked down 1–2 teeth, and such an engine will not work for a long time. It is better to double-check the installation immediately.

What to do if the marks match, but the engine does not start?

1. Check the power supply to the crankshaft sensor (the connector may be oxidized).

2. Make sure that the belt does not slip during the first start (sometimes this happens due to low tension).

3. Check the compression in all cylinders - the valves may have bent due to a break in the old belt.

6. When to change the timing belt on a Nissan March AK12: regulations and signs of wear

Official regulations Nissan requires replacing the timing belt every 100 thousand km or 5 years (whichever comes first). However, in Russian conditions these periods should be reduced:

• 🛣️ For the city (frequent traffic jams, short trips): every 70–80 thousand km.
• ❄️ For cold climates (below –20°C in winter): every 60–70 thousand km (rubber loses elasticity).
• 🏁 For aggressive driving (high revs, sporty style): every 50–60 thousand km.

Signs of timing belt wear (even if the replacement date has not arrived):

• 🔊 Whistle or noise from under the timing cover when cold.
• 🔧 Cracks or “fringe” on the belt (visible upon visual inspection).
• 🛑 Oil or antifreeze on the belt (leads to corroding rubber).
• 🔄 Uneven belt wear (one side wears out faster).

7. Cost of replacing a timing belt: prices for spare parts and labor

Cost of replacing a timing belt Nissan March AK12 depends on engine type and region. Below are average prices in Russia for 2026:

Part/Work	CR14DE (1.4 l)	HR15DE (1.5 l)	Notes
Timing belt (original)	3 500–4 500 ₽	4 000–5 000 ₽	Original numbers: 13028-4M50A (CR14), 13028-ED00A (HR15).
Tensioner roller (original)	2 000–2 500 ₽	2 500–3 000 ₽	Analogues: Gates T42028, NTN SNR KIT024322.
Pump (replacement recommended)	2 500–3 500 ₽	3 000–4 000 ₽	Original: 21010-4M505. Change along with the belt!
Work (replacing belt + rollers)	4 000–6 000 ₽	5 000–7 000 ₽	Cost is higher for HR15DE due to difficulty of access.
Complete set (belt + rollers + pump)	8 000–12 000 ₽	9 500–14 000 ₽	Saving on the pump often leads to its exit through 20–30 thousand km.

⚠️ Attention: If you are offered to replace the timing belt for 3–4 thousand rubles. “turnkey”, most likely, cheap spare parts are used or the pump is not changed. Such savings will result in expensive repairs.

FAQ: Frequently asked questions about timing marks on the Nissan March AK12

Is it possible to drive if the timing belt starts to whistle?

The timing belt whistle is a sign of wear or low tension. You can drive, but no more than 500–1000 km, and only if the whistle appears when cold and disappears after warming up. If the whistle is constant or accompanied by vibrations, the belt needs to be replaced urgently. B 20% of cases such a whistle precedes a break.

What happens if the timing belt jumps 1 tooth?

Offset by 1 tooth will lead to valve timing failure. Symptoms:

• The engine stalls or runs erratically.
• Power will drop (the car accelerates poorly).
• The panel may light up Check Engine with errors P0340 or P0300.

Long-term driving in this mode leads to accelerated wear of valves and seats. The belt needs to be reinstalled urgently.

How to check the timing belt tension without a special tool?

Can be used deflection method:

1. Press the belt between the crankshaft and camshaft pulleys firmly 10 kg (you can use scales).
2. The deflection should be 5–7 mm.
3. If the deflection is greater, the belt is weakly tensioned, if it is less, it will be overtightened.

⚠️ This method is approximate. For an accurate check you need a dynamometer.

Do I need to change the pump when replacing the timing belt?

Yes, necessarily. Pump on Nissan March AK12 is driven by a timing belt, and its resource is comparable to the service life of the belt. If the pump jams, the belt will break, causing the valves to bend. Cost of a new pump (~3 000 ₽) is not comparable to the risks.

Is it possible to set timing marks without special clamps?

Yes, but it requires caution. Instead of clamps you can:

• Use screwdriver to block the flywheel through the hatch in the box.
• Mark the position of the pulleys marker before removing the belt.
• Check the position of the valves through the spark plug wells (as described in section 5).

However, without clamps the risk of error is higher, especially on HR15DE.