Adjusting the valves Nissan Note 1.4 with engine HR14DE - a procedure that many car owners put off until the last minute, until characteristic knocking noises or a drop in power appear. Meanwhile, correct thermal clearances directly affect engine life, fuel consumption and ride comfort. Unlike older engines Nissan, where adjustment was required every 20–30 thousand km, HR14DE thanks to hydraulic compensators intake valve drive needs adjustment less often - but this does not mean that the problem is completely excluded.

In this article, we'll look at when adjustments are actually needed (or if they're needed at all) on your Note), what tools are needed, and how to complete the job without errors. We will pay special attention typical pitfalls, because of which even experienced craftsmen sometimes redo the work. If you hear a metallic knock on a cold engine or notice unstable speed, do not rush to go to the service center: with a minimum set of tools and patience, even beginners can do the task.

When is valve adjustment needed on a Nissan Note 1.4?

Engine HR14DE, installed on Nissan Note first and second generations (including restyled versions), equipped with hydraulic compensators only on intake valves. This means that:

  • 🔧 Intake valves there is no need to adjust - the gaps are compensated automatically.
  • 🔧 Exhaust valves require manual adjustment, since they do not have hydraulic compensators.
  • ⚠️ Knocking when cold - the first sign that the gaps are increased. When the engine is hot, the sound may disappear.
  • 📉 Power drop and unstable idle also indicate a problem.

According to the regulations Nissan, checking clearances is recommended every 90–100 thousand km, but in practice the interval depends on operating conditions. For example, if you frequently travel short distances (when the engine does not warm up completely) or use low-quality oil, adjustment may be required earlier. Please note: If you recently purchased a used Note and do not know the service history, checking the valves should be done as a priority.

⚠️ Attention: If, after replacing the timing belt or camshafts, valve knocking appears, adjustment must be made immediately - this may indicate broken phases or incorrect assembly.
📊 How often do you check the valve clearances on your Nissan Note?
  • Every 50 thousand km
  • Every 100 thousand km
  • Only when there is a knock
  • Never checked

Tools and materials for adjustment

For self-adjustment of valves on Nissan Note 1.4 you will need a specialized tool. Do not try to make do with “improvised” means - this can lead to thread breakage or incorrect installation of gaps. Here's the full list:

Tool/material Purpose Note
Set of feeler gauges (0.10–0.50 mm) Checking current gaps Preferably in increments of 0.01 mm
Micrometer or dial indicator Accurate gap measurement For professional adjustment
Special wrench for adjusting bolts Fixing the bolts when tightening Key fits Nissan 14990-00E02
Torque wrench Torque control Required for cylinder head cover bolts (10–12 Nm)
New valve cover and camshaft gaskets Sealing after assembly It is recommended to replace even if the old ones “seem to be normal”

Additionally, prepare a standard set of keys (10 mm, 12 mm, 14 mm), flat-blade and Phillips-head screwdrivers, as well as carburetor cleaner to remove carbon deposits from cylinder head parts. If you plan to adjust the gaps for the first time, take felt-tip pen or marker — it’s convenient for them to mark the adjusted valves so as not to get confused.

Remove the negative terminal of the battery|Clean the top of the engine from dirt|Prepare new gaskets and sealant|Check that all the tools from the list are present-->

Engine preparation: removing the valve cover and camshafts

Before starting work, the engine must be completely cold (temperature no higher than 20–25°C). This is critical, since the gaps are measured precisely “cold”. Start by removing the following items:

  1. Disconnect negative battery terminal.
  2. Remove air filter and pipes leading to the throttle valve.
  3. Unscrew the fasteners valve cover (8 wrench bolts 10 mm).
  4. Carefully pry the cover with a screwdriver and remove it, avoiding damage to the gasket.

Next you need to remove camshafts. To do this:

  1. Turn the crankshaft clockwise until the marks on the pulley and the cylinder block align (TDC of the 1st cylinder).
  2. Loosen the timing belt tensioner and remove the belt from the camshaft pulleys.
  3. Unscrew the fastening bolts camshaft beds (4 bolts for each shaft, tightening torque for reassembly - 10 Nm).
  4. Carefully remove the shafts without damaging the seals.
⚠️ Attention: When removing camshafts the crankshaft cannot be rotated - this can lead to contact of the pistons with the valves and damage to the engine!
How to check TDC without marks?

If the marks on the pulley are erased, use a long screwdriver: insert it into the spark plug hole of the 1st cylinder and rotate the crankshaft until the piston reaches the maximum top point. Then check the position of the camshafts - their cams should “look” up on the 1st cylinder.

Order and norms of valve clearances on Nissan Note 1.4

On the engine HR14DE regulated exhaust valves only (2 for each cylinder, 8 pieces in total). Normal clearances for cold engine:

  • 🔩 Intake valves: automatic adjustment (hydraulic compensators).
  • 🔥 Exhaust valves: 0.25–0.35 mm (denomination - 0.30 mm).

The adjustment order is strictly tied to the numbering of the cylinders (considered from the timing belt side):

  1. 1st cylinder: exhaust valves No. 1 and No. 2.
  2. 2nd cylinder: No. 3 and No. 4.
  3. 3rd cylinder: No. 5 and No. 6.
  4. 4th cylinder: No. 7 and No. 8.

To measure the gap:

  1. Place the feeler gauge of the required thickness between camshaft cam And adjusting bolt.
  2. The probe should enter with light effort - if it passes too freely or does not enter, adjustment is required.
  3. To adjust, loosen the locknut with a wrench 12 mm, then turn the bolt with a wrench Nissan 14990-00E02, while simultaneously checking the gap with a feeler gauge.
  4. Once the correct clearance is set, tighten the lock nut to torque. 12–14 Nm and check again with the dipstick.
💡

If the dipstick 0.30 mm not included, but 0.25 mm passes freely, try the gap 0.28 mm - This is an acceptable compromise for worn engines.

Common mistakes and how to avoid them

Even experienced mechanics sometimes make mistakes when adjusting valves on Nissan Note 1.4. Here are the most common:

  • 🔧 Incorrect tightening torque locknuts - leads to self-loosening of the bolts and changes in clearances.
  • 🌡️ Adjustment on a hot engine — the gaps will be too low, which will cause the valves to “squeeze” after cooling.
  • 🔄 Confusion about valve numbering — adjusting the “wrong” valves leads to an imbalance in the operation of the cylinders.
  • 🛠️ Using worn styli — the measurement error can reach 0.03–0.05 mm.

To avoid problems:

  • 📏 Before starting work check the probes on new parts (for example, between micrometer planes).
  • 🔧 Always use torque wrench for tightening the locknuts.
  • 📝 Keep a record of measurements before and after adjustments for each valve.
⚠️ Attention: If after adjustment the engine starts to run worse (rpm fluctuates, vibration appears), most likely you have overtightened the bolts or set the gaps less than nominal. Repeat the procedure!
💡

On Nissan Note 1.4 With a mileage of more than 150 thousand km, the exhaust valve clearances often “go” upward due to wear of the seats. In this case, it is permissible to set the gap up to 0.35 mm, but no more!

Engine assembly after adjustment

After completing the adjustment, reassemble the engine in reverse order, observing the following rules:

  1. Install camshafts into place, aligning the marks.
  2. Tighten the camshaft bed bolts to torque 10 Nm in 2 approaches (first preliminary, then final).
  3. Install new timing belt (if the old one is worn out) and tighten it with force 2–3 kgf in the middle section.
  4. Before installation valve cover clean its seating surface and apply a thin layer of sealant (for example, Loctite 574).
  5. Tighten the cover bolts to torque 8–10 Nm in a checkerboard pattern.

After assembly:

  • 🔋Connect battery and start the engine.
  • 🔍 Check for absence oil leaks from under the valve cover.
  • 🎧 Listen to the engine at different speeds - there should be no knocking.

In the first 50–100 km after adjustment, avoid high loads on the engine (for example, towing or aggressive acceleration). This will allow the new gaskets to “sit” and the oil to be evenly distributed throughout the system.

FAQ: Frequently asked questions about valve adjustment

Is it possible to adjust valves on a hot engine?

No! Gaps are measured only when cold engine (temperature not higher than 25°C). On a hot engine, the metal expands and the clearances will be too low, which will lead to “clamping” of the valves after cooling and accelerated wear.

How often do valves need to be adjusted on a Nissan Note 1.4?

According to the regulations - every 90–100 thousand km, but in practice the interval depends on operating conditions. When using quality oil (for example, Nissan 5W-30) and the absence of knocks, the check can be done less frequently. If the engine often operates at high speeds or in city traffic jams, adjustments should be made every 60–70 thousand km.

What happens if you don't adjust the valves?

When increased clearances You will hear a metallic knock, power will deteriorate and fuel consumption will increase. When reduced clearances the valves will not close completely, which leads to loss of compression, burnt valves and even damage to the pistons. In both cases, the engine life is reduced by 20–30%.

Is it possible to adjust the valves without a special key?

Theoretically yes, but it is extremely inconvenient. Special key Nissan 14990-00E02 fixes the adjusting bolt when tightening the locknut, preventing it from turning. Without it you will have to use two screwdrivers or pliers, which can lead to thread breakage or inaccurate gap setting.

Do I need to change the valve cover gasket when making adjustments?

Yes, necessarily. Even if the old gasket looks intact on the outside, after removing the cover it will become deformed and will not provide a tight seal. The cost of a new gasket is low (about 300–500 rub.), and oil leakage through it can lead to dirt getting into the engine.