Engine Mechanical: Diagnosis Nissan Armada I facelift

Precaution for Inspection, Repair and Replacement

Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and replace if necessary.

Use the Chart Below to Help You Find the Cause of the Symptom

1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source.

If necessary, repair or replace these parts.

OPERATING CONDITION OF ENGINE

Scheme 11

1. Remove air duct and resonator assembly when inspecting drive belt.
2. Make sure that indicator (single line notch) of each auto tensioner is within the allowable working range (between three line notches). NOTE: Check the drive belt auto tensioner indication when the engine is cold. The indicator notch is located on the moving side of the drive belt auto tensioner.
3. Visually check entire belt for wear, damage or cracks.
4. If the indicator is out of allowable working range or belt is damaged, replace the belt. Refer to «ON-VEHICLE MAINTENANCE»(ref-320185-S02977605332009071300000) .

INSPECTION

Note. Perform the following inspection after removal, installation or replacement of camshaft or valve-related parts, or if there are unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or noise).

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1. Warm up the engine. Then stop the engine.
2. Remove the engine room cover. Refer to " «REMOVAL AND INSTALLATION»(ref-320185-S33486365092009071300000) ".
3. Remove the air cleaner and air duct assembly. Refer to " «REMOVAL AND INSTALLATION»(ref-320185-S30482178812009071300000) ".
4. Remove the RH bank and LH bank rocker covers using power tool. Refer to " «REMOVAL AND INSTALLATION»(ref-320185-S10331236532009071300000) ".
5. Turn the crankshaft pulley in the normal direction (clockwise when viewed from engine front) to align TDC identification notch (without paint mark) with timing indicator.
6. At this time, make sure both the intake and exhaust cam noses of No. 1 cylinder (top front on LH bank) face outside. If they do not face outside, turn crankshaft pulley once more.
7. Measure valve clearances at the locations marked "x" as shown in the table below (locations indicated with black arrow). <=: Engine front <-- (black): Measurable at No. 1 cylinder compression top dead center <-- (white): Measurable at No. 3 cylinder compression top dead center A: RH B: LH C: Exhaust D: Intake NOTE: Firing order 1-8-7-3-6-5-4-2 No. 1 cylinder compression TDC VALVES POSITION Measuring position (RH bank) No. 2 cyl (E) No. 4 cyl (F) No. 6 cyl (G) No. 8 cyl (H) No. 1 cylinder at TDC EXH x INT x x Measuring position (LH bank) No. 1 cyl (J) No. 3 cyl (K) No. 5 cyl (L) No. 7 cyl (M) No. 1 cylinder at TDC INT x x EXH x x Measure valve clearance using suitable tool. Refer to " «STANDARD AND LIMIT»(ref-320185-S35419514872009071300000) ". CAUTION: If the inspection was carried out with a cold engine, make sure the values with a fully warmed up engine are still within specifications.
8. Turn the crankshaft pulley clockwise 270° from the position of No. 1 cylinder compression TDC to obtain No. 3 cylinder compression TDC.
9. Measure valve clearances at the locations marked "x" as shown in the table below (locations indicated with white arrow). <=: Engine front <-- (black): Measurable at No. 1 cylinder compression top dead center <-- (white): Measurable at No. 3 cylinder compression top dead center A: RH B: LH C: Exhaust D: Intake NOTE: Firing order 1-8-7-3-6-5-4-2 No. 3 cylinder compression TDC VALVES POSITION Measuring position (RH bank) No. 2 cyl (E) No. 4 cyl (F) No. 6 cyl (G) No. 8 cyl (H) No. 3 cylinder at TDC EXH x INT x Measuring position (LH bank) No. 1 cyl (J) No. 3 cyl (K) No. 5 cyl (L) No. 7 cyl (M) No. 3 cylinder at TDC INT x x EXH x x Measure valve clearance using suitable tool. Refer to " «STANDARD AND LIMIT»(ref-320185-S35419514872009071300000) ". CAUTION: If the inspection was carried out with a cold engine, make sure the values with a fully warmed up engine are still within specifications.
10. Turn the crankshaft pulley clockwise 90° from the position of No. 3 cylinder compression TDC (clockwise by 360° from the position of No. 1 cylinder compression TDC) to measure the intake and exhaust valve clearances of No. 6 cylinder (G) and the exhaust valve clearance of No. 2 cylinder (E). <=: Engine front A: RH B: LH C: Exhaust D: Intake E: No. 2 cylinder F: No. 4 cylinder G: No. 6 cylinder H: No. 8 cylinder J: No. 1 cylinder K: No. 3 cylinder L: No. 5 cylinder M: No. 7 cylinder
11. If out of specifications, adjust as necessary.

INSPECTION AFTER INSTALLATION

1. After installing fuel tubes, make sure there is no fuel leakage at connections in the following steps. Apply fuel pressure to fuel lines by turning ignition switch ON (with engine stopped). Then check for fuel leaks at connections. Start the engine and rev it up and check for fuel leaks at the connections.
2. Perform procedures for "Throttle Valve Closed Position Learning" after finishing repairs. Refer to " «THROTTLE VALVE CLOSED POSITION LEARNING»(ref-320188-S24383209112009071300000) ".
3. If electric throttle control actuator is replaced, perform procedures for "Idle Air Volume Learning" after finishing repairs. Refer to " «IDLE AIR VOLUME LEARNING»(ref-320188-S04734695472009071300000) ".

Scheme 16

INSPECTION AFTER REMOVAL

Clean the oil strainer.

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1. Install the oil pan (upper) using the following steps. Apply liquid gasket thoroughly as shown. Use Genuine RTV Silicone Sealant or equivalent. Refer to " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-320178-S17417948952009071300000) ". CAUTION: Apply liquid gasket to outside of bolt hole for the hole shown by *. Install new O-rings to the oil pump and front cover side. Tighten the bolts in numerical order as shown. M6 x 30 mm (1.18 in): No. 15, 16 M8 x 25 mm (0.98 in): No. 1, 3, 5, 7, 11, 13 M8 x 45 mm (1.77 in): No. 2, 4, 6, 8, 10, 14 M8 x 123 mm (4.84 in): No. 9, 12
2. Install the oil strainer to the oil pan (upper).
3. Install the oil pan (lower). Apply liquid gasket thoroughly as shown. Use Genuine RTV Silicone Sealant or equivalent. Refer to " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-320178-S17417948952009071300000) ". Tighten the oil pan (lower) bolts in numerical order as shown.
4. Install the oil pan drain plug.
5. Install engine assembly. Refer to " «REMOVAL AND INSTALLATION»(ref-320185-S32613362772009071300000) ". Do not fill the engine oil for at least 30 minutes after oil pan is installed.

1. Check engine oil level and add engine oil if necessary. Refer to " «INSPECTION»(ref-320190-S21592702432009071300000) ".
2. Start the engine, and check for leaks of engine oil.
3. Stop engine and wait for 10 minutes.
4. Check engine oil level again.

Scheme 21

After installing fuel tubes, make sure there are no fuel leaks at connections using the following steps.

1. Apply fuel pressure to fuel lines by turning ignition switch ON (with engine stopped). Then check for fuel leaks at connections.
2. Start the engine and rev it up and check for fuel leaks at connections.

Note. Use mirrors for checking on hidden points.

Scheme 22

Check for cracks and any excessive wear at link plates. Replace chain if necessary .

1. In the same way as for the LH bank, inspect the timing chain and associated parts on the RH bank.

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Note. The illustration above shows the relationship between the mating mark on each timing chain and that of the corresponding sprocket, with the components installed. To install the timing chain and associated parts, start with those on the RH bank. The procedure for installing parts on the LH bank is omitted because it is the same as that for installation on the RH bank.

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1. Make sure the crankshaft key and RH bank camshaft dowel pin and LH bank camshaft dowel pin are facing in the direction shown.
2. Install the camshaft sprockets. Install the camshaft sprocket INT (VTC) (A) and camshaft sprockets EXH (B) by selectively using the groove of the dowel pin according to the bank. (Common part used for both exhaust banks.) NOTE: Use the groove marked "R" for RH bank and "L" for LH bank. Lock the hexagonal part of the camshaft in the same way as for removal, and tighten the bolts.
3. Install the crankshaft sprockets for both banks. Install LH bank crankshaft sprocket (B) and RH bank crankshaft sprocket (C) so that their flange side (A) (the larger diameter side without teeth) faces in the direction shown. NOTE: The same parts are used but facing directions are different.
4. Install the timing chains and associated parts. Align the alignment mark on each sprocket and the timing chain for installation. CAUTION: Before installing timing chain tensioner, it is possible to change the position of alignment mark on timing chain and each sprocket. After the alignment marks are aligned, keep them aligned by holding them by hand. Install the slack guides and tension guides onto the correct side by checking the identification mark on the surface. Install the timing chain tensioner with the plunger locked in with the stopper pin. CAUTION: Before and after the installation of the timing chain tensioner, make sure that the alignment mark on the timing chain is not out of alignment. After installing the timing chain tensioner, remove the stopper pin to release the tensioner. Make sure the tensioner is released. To avoid chain-link skipping of the timing chain, do not move crankshaft or camshafts until the front cover is installed.
5. In the same way as for the RH bank, install the timing chain and associated parts on the LH bank.
6. Install the oil pump.
7. Install the oil pump drive spacer as follows: Install so that the front mark on the front edge of the oil pump drive spacer faces the front of the engine. Insert the oil pump drive spacer according to the directions of the crankshaft key and the two flat surfaces of the oil pump inner rotor. If the positional relationship does not allow the insertion, rotate the oil pump inner rotor to allow the oil pump drive spacer to be inserted.
8. Install the front oil seal using suitable tool. CAUTION: Do not scratch or make burrs on the circumference of the oil seal.
9. Install the chain tensioner cover. Apply liquid gasket as shown. Use Genuine RTV Silicone Sealant or equivalent. Refer to " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-320178-S17417948952009071300000) ".
10. Install the front cover as follows: Install a new O-ring on the cylinder block. Apply liquid gasket as shown. Use Genuine RTV Silicone Sealant or equivalent. Refer to " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-320178-S17417948952009071300000) ". Check again that the timing alignment marks on the timing chain and on each sprocket are aligned. Then install the front cover. Install the bolts in the numerical order shown. M6 x 50 mm (1.97 in): No. 1, 20, 25, 26, 27 M6 x 80 mm (3.15 in): No. 4, 5, 7 M6 x 20 mm (0.79 in): Except the above After tightening, re-tighten to the specified torque. CAUTION: Be sure to wipe off any excessive liquid gasket leaking onto surface mating with oil pan.
11. Install the intake valve timing control solenoid valve cover (RH) (A) and intake valve timing control solenoid valve cover (LH) (B) as follows: *: Cross mark (C) that can not be seen after assembly D: 2.6 - 3.6 mm (0.102 - 0.142 in) dia . Apply liquid gasket (D) as shown. Use Genuine RTV Silicone Sealant or equivalent. Refer to " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-320178-S17417948952009071300000) ". CAUTION: The start and end of the application of the liquid gasket should be crossed at a position (C) that cannot be seen after attaching the chain case cover. Install the bolts in the numerical order shown. A: Intake valve timing control solenoid valve cover (RH) B: Intake valve timing control solenoid valve cover (LH)
12. Install the crankshaft pulley. Install the key of the crankshaft. Insert the pulley by lightly tapping it. CAUTION: Do not tap pulley on the side surface where the belt is installed (outer circumference).
13. Tighten the crankshaft pulley bolt. Lock the crankshaft using suitable tool, then tighten the bolt. Perform the following steps for angular tightening: Apply engine oil onto the threaded parts of the bolt and seating area. Select the one most visible notch of the four on the bolt flange. Corresponding to the selected notch, put a alignment mark (such as paint) on the crankshaft pulley. Crankshaft pulley bolt torque Step 1: 93.1 N.m (9.5 kg-m, 69 ft-lb) Step 2: additional 90° (angle tightening)
14. Rotate the crankshaft pulley in normal direction (clockwise when viewed from engine front) to check for parts interference.
15. Installation of the remaining components is in the reverse of order of removal.

1. Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are lower than required quantity, fill to the specified level. Refer to " «FLUIDS AND LUBRICANTS»(ref-320187-S28858193382009071300000) ".
2. Use procedure below to check for fuel leakage.
3. Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel leakage at the connection points.
4. Start engine. With engine speed increased, check again for fuel leakage at connection points.
5. Run engine to check for unusual noise and vibration. NOTE: If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop after hydraulic pressure rises.
6. Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including engine oil and engine coolant.
7. Bleed air from passages in lines and hoses, such as in cooling system.
8. After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to specified level if necessary.
9. Summary of the inspection items

INSPECTION CHART

Scheme 35

INSPECTION OF CAMSHAFT SPROCKET (INT) OIL GROOVE

1. Check engine oil level. Refer to " «INSPECTION»(ref-320190-S21592702432009071300000) ".
2. Perform the following procedure so as to prevent the engine from being unintentionally started while checking. Release fuel pressure. Refer to " «FUEL PRESSURE CHECK»(ref-320188-S03462428842009071300000) ". Disconnect ignition coil and injector harness connectors if practical.
3. Remove IVT control solenoid valve.
4. Crank engine, and then make sure that engine oil comes out from IVT control cover oil hole. End cranking after checking. WARNING: Be careful not to touch rotating parts (drive belts, idler pulley, and crankshaft pulley, etc.). CAUTION: Engine oil may squirt from IVT control solenoid valve installation hole during cranking. Use a shop cloth to prevent engine oil from splashing on worker, engine components and vehicle. Do not allow engine oil to get on rubber components such as drive belts or engine mount insulators. Immediately wipe off any splashed engine oil.
5. Clean oil groove between oil strainer and IVT control solenoid valve if engine oil does not come out from IVT control valve cover oil hole. Refer to " «SCHEMATIC»(ref-320190-S04631411462009071300000) ".
6. Remove components between IVT control solenoid valve and camshaft sprocket (INT), and then check each oil groove for clogging. Clean oil groove if necessary.
7. After inspection, installation of the remaining components is in the reverse order of removal.

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1. Remove the camshaft relating to the valve oil seal to be removed. Refer to " «REMOVAL AND INSTALLATION»(ref-320185-S37368103112009071300000) ".
2. Remove the valve lifters. Refer to " «EXPLODED VIEW»(ref-320185-S41807191352009071300000) ". Correctly identify the location where each part is removed from. Keep parts organized to avoid mixing them up.
3. Turn the crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent the valve from dropping into the cylinder.
4. Remove the valve collet using Tool. Tool number: KV10116200 (J-26336-A) : KV10115900 (J-26336-20) : KV10109220 (-) CAUTION: Do not damage the valve lifter holes.
5. Remove the valve spring retainer and valve spring. CAUTION: Do not remove the valve spring seat from the valve spring.
6. Remove the valve oil seal using Tool. Tool number: KV10107902 (J-38959)

1. Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are lower than required quantity, fill to the specified level. Refer to " «FLUIDS AND LUBRICANTS»(ref-320187-S28858193382009071300000) ".
2. Use procedure below to check for fuel leakage.
3. Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel leakage at the connection points.
4. Start engine. With engine speed increased, check again for fuel leakage at connection points.
5. Run engine to check for unusual noise and vibration. NOTE: If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop after hydraulic pressure rises.
6. Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including engine oil and engine coolant.
7. Bleed air from passages in lines and hoses, such as in cooling system.
8. After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to specified level if necessary.
9. Summary of the inspection items

INSPECTION CHART

Scheme 38

1. Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are lower than required quantity, fill to the specified level. Refer to " «FLUIDS AND LUBRICANTS»(ref-320187-S28858193382009071300000) ".
2. Use procedure below to check for fuel leakage.
3. Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel leakage at the connection points.
4. Start engine. With engine speed increased, check again for fuel leakage at connection points.
5. Run engine to check for unusual noise and vibration. NOTE: If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop after hydraulic pressure rises.
6. Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including engine oil and engine coolant.
7. Bleed air from passages in lines and hoses, such as in cooling system.
8. After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to specified level if necessary.
9. Summary of the inspection items

INSPECTION CHART

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