Engine Mechanical (KA24DE): Diagnosis Nissan Frontier D22

NVH Troubleshooting Chart - Engine Noise

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 the engine.
4. Check the specified noise source.

If necessary, repair or replace these parts.

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SEC. 140 . 147 . 220 . 221 . 226

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1. Warm up engine.
2. Turn ignition switch OFF.
3. Release fuel pressure. Refer to "FUEL PRESSURE RELEASE " .
4. Remove all spark plugs. Clean area around plug with compressed air before removing the spark plug.
5. Disconnect camshaft position sensor harness connector at the distributor.
6. Remove fuel injector fuse 3 on FUSE BLOCK (J/B) behind the instrument lower panel driver's side.
7. Attach a compression tester to No. 1 cylinder.
8. Depress accelerator pedal fully to keep throttle valve wide open.
9. Crank engine and record highest gauge indication.
10. Repeat the measurement on each cylinder as shown above. Always use a fully-charged battery to obtain specified engine speed. Compression pressure: kPa (kg/cm 2 , psi)/300 RPM Standard 1,226 (12.5, 178) Minimum 1,030 (10.5, 149) Difference limit between cylinders 98 (1.0, 14)
11. If compression in one or more cylinders is low: Pour a small amount of engine oil into cylinders through spark plug holes. Retest compression. If adding oil improves cylinder compression, piston rings may be worn or damaged. If so, replace piston rings after checking piston. If pressure stays low, a valve may be sticking or seating improperly. Inspect and repair valve and valve seat. Refer to " «VALVE»(ref-183499-S35167398642005081400000) " and " «VALVE SEAT»(ref-183499-S39328071532005081400000) " . If valve or valve seat is damaged excessively, replace it. If compression in any two cylinders adjacent cylinders is low, and if adding oil does not improve compression, there is leakage past the gasket surface. If so, replace cylinder head gasket.
12. Reinstall spark plugs, fuel injector fuse, fuel pump fuse, and reconnect camshaft position sensor harness connector at the distributor.
13. Erase the DTC stored in the ECM.

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1. Raise vehicle and support it with safety stands.
2. Remove engine under cover.
3. Drain engine oil.
4. Remove front suspension member.
5. Remove oil pan bolts.
6. Remove oil pan. Insert Tool between cylinder block and oil pan. Be careful not to damage aluminum mating surface. Do not insert screwdriver, or oil pan flange will be damaged. Slide Tool by tapping on the side of the Tool with a hammer.
7. Pull out oil pan from front side.

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1. Use a scraper to remove old liquid gasket from mating surface of oil pan. Also remove traces of liquid gasket from mating surface of cylinder block.
2. Apply a continuous bead of liquid gasket to mating surface of oil pan. Use Genuine Silicone RTV or equivalent. Refer to "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ". Apply to groove on mating surface. Allow 7 mm (0.28 in) clearance around bolt hole. Be sure liquid gasket diameter is 3.5 to 4.5 mm (0.138 to 0.177 in). Attaching should be done within 5 minutes after coating.
3. Install oil pan. Tighten oil pan bolts in numerical order.: 6.4 - 7.5 N.m (0.65 - 0.76 kg-m, 56 - 66 in-lb) Wait at least 30 minutes before refilling engine oil.
4. Install parts in reverse order of removal.

Inspection

Check for cracks and excessive wear at roller links. Replace chain if necessary.

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1. Install crankshaft sprocket. Make sure that mating marks of crankshaft sprocket face front of engine.
2. Install the idler sprocket and lower timing chain using the mating marks and the paint marks made during the removal process. CAUTION: Be careful not to tear or damage the cylinder head gasket.
3. Install chain guide and chain tension arm.
4. Install lower chain tensioner and remove the pin securing the piston into the tensioner body.
5. Front cover installation: Using a scraper or other suitable tool remove all traces of liquid gasket from the cylinder block and front cover mating surfaces. Install new crankshaft seal in front cover. Apply a continuous bead of liquid gasket to front cover. Refer to " «LIQUID GASKET APPLICATION PLACES»(ref-183499-S21514295742005081400000) " . NOTE: Use Genuine Silicone RTV or equivalent. Refer to "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ". Be sure to install new front oil seal. Refer to " «FRONT OIL SEAL»(ref-183499-S33540063502005081400000) " . Also place RTV sealant on the head gasket surface. Install the front cover to the engine.
6. Install oil strainer and oil pan. Refer to " «INSTALLATION»(ref-183499-S07431806222005081400000) " .
7. Install the oil pump and distributor drive shaft. NOTE: Make sure the flat side of the distributor drive shaft is facing the engine. Failure to do so will result in the distributor being out of time.
8. Install the following parts: Crankshaft pulley. A/C compressor and idler pulley bracket. Radiator shroud and cooling fan with coupling. A/C compressor, alternator and power steering pump drive belts. Air duct.