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Home >> Nissan-Datsun >> 2012 >> Juke AWD L4-1.6L Turbo (MR16DDT) >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Camshaft, Lifters and Push Rods >> Camshaft >> Service and Repair >> Inspection

Inspection




CAMSHAFT

Inspection


INSPECTION AFTER REMOVAL

Camshaft Runout
1.Put V-block on a precise flat table, and support No. 2 and 5 journal of camshaft.

CAUTION:
Never support No. 1 journal (on the side of camshaft sprocket) because it has a different diameter from the other four locations.





2.Set dial indicator (A) vertically to No. 3 journal.
3.Turn camshaft to one direction with hands, and measure the camshaft runout on dial indicator. (Total indicator reading)
Standard and Limit: Camshaft.
4.If it exceeds the limit, replace camshaft.
Camshaft Cam Height





1.Measure the camshaft cam height with a micrometer (A).
Standard and Limit: Camshaft.
2.If it exceeds the limit, replace camshaft.
Camshaft Journal Oil Clearance

CAMSHAFT JOURNAL OUTER DIAMETER





Measure the outer diameter of camshaft journal with a micrometer (A).

Standard : Camshaft.

CAMSHAFT BRACKET INNER DIAMETER
- Tighten camshaft bracket bolts with specified torque. Removal And Installation.





- Measure the inner diameter of camshaft bracket with a bore gauge (A).





Standard: Camshaft.

CAMSHAFT JOURNAL OIL CLEARANCE
- (Oil clearance) = (Camshaft bracket inner diameter) - (Camshaft journal diameter)
Standard and Limit: Camshaft.
- If it exceeds the limit, replace camshaft or cylinder head, or both.
NOTE:
Camshaft bracket cannot be replaced as a single part, because it is machined together with cylinder head.
Replace whole cylinder head assembly.
Camshaft End Play
1.Install camshaft in cylinder head. Removal And Installation.





2.Install dial indicator in thrust direction on front end of camshaft.
Read the end play of dial indicator (A) when camshaft is moved forward/backward (in direction to axis).
Standard and Limit: Camshaft.
- Measure the following parts if out of the standard.





- Dimension (A) for groove of cylinder head No. 1 journal
Standard: 4.000 - 4.030 mm (0.1575 - 0.1587 in)
- Dimension (B) for camshaft flange
Standard: 3.877 - 3.925 mm (0.1526 - 0.1545 in)
- Refer to the standards above, and then replace camshaft and/
or cylinder head.
Camshaft Sprocket Runout
1.Put V-block on precise flat table, and support No. 2 and 5 journals of camshaft.

CAUTION:
Never support No. 1 journal (on the side of camshaft sprocket) because it has a different diameter from the other four locations.





2.Measure the camshaft sprocket runout with a dial indicator (A).
(Total indicator reading)
Limit: Camshaft.
- If it exceeds the limit, replace camshaft sprocket.
Valve Lifter





Check if surface of valve lifter has any wear or cracks.
- If anything above is found, replace valve lifter. Camshaft.
Valve Lifter Clearance
VALVE LIFTER OUTER DIAMETER





- Measure the outer diameter of valve lifter with a micrometer (A).
Standard: Camshaft.

VALVE LIFTER HOLE DIAMETER





Measure the inner diameter of valve lifter hole of cylinder head with an inside micrometer (A).
Standard: Camshaft.

VALVE LIFTER CLEARANCE
- (Valve lifter clearance) = (Valve lifter hole diameter) - (Valve lifter outer diameter)

Standard: Camshaft.

- If out of the standard, referring to the each standard of valve lifter outer diameter and valve lifter hole diameter, replace either or both valve lifter and cylinder head.

INSPECTION AFTER INSTALLATION

Inspection of Camshaft Sprocket (INT), (EXH) Oil Groove

CAUTION:
- Perform this inspection only when DTC P0011 or P0014 is detected in self-diagnostic results of CONSULT and it is directed according to inspection procedure of EC section. P0011 (P0011) or P0014 (P0014).
- Check when engine is cold so as to prevent burns by the splashing engine oil.
1.Check engine oil level. Testing and Inspection.
2.Perform the following procedure so as to prevent the engine from being unintentionally started while checking.
a.Release the fuel pressure. Testing and Inspection.
b.Remove intake manifold. Exploded View.
c.Disconnect ignition coil and injector harness connectors.
d.Support the bottom surface of engine using a transmission jack, and then remove the engine mounting bracket (RH) and engine mounting insulator (RH). Exploded View (M/T models)
or Exploded View (CVT models).
3.Remove intake or exhaust valve timing control solenoid valve. Exploded View.
- Lift the front side of the engine with a jack base to remove intake or exhaust valve timing control solenoid valve.
4.Clean the mounting area of intake or exhaust valve timing control solenoid valve, and then insert a clean waste with no oil adhesion into the oil hole of the cylinder head.
5.Install engine mounting insulator (RH) and engine mounting bracket (RH). (After the removal of intake or exhaust valve timing control solenoid valve and insertion of a waste into the oil hole.)
6.Perform cranking to check that engine oil comes out from the oil hole (mounting hole of intake or exhaust valve timing control solenoid valve) of cylinder head.
- Regarding the engine oil check, judge it by the amount of oil adhered to the wasted inserted into the oil hole.

WARNING:
- Never insert fingers into the oil hole.
- Be careful not to touch rotating parts (drive belt, idler pulleys and crankshaft pulley, etc.).

CAUTION:
- Never perform cranking without installing the engine mounting insulator (RH) and engine mounting bracket (RH).
- Prevent splashing by using a shop cloth so as to prevent the worker from injury from engine oil and so as to prevent engine oil contamination.
- Prevent splashing by using a shop cloth so as to prevent engine oil from being splashed to engine and vehicle. Especially, be careful not to apply engine oil to rubber parts of drive belt, engine mounting insulator, etc. Wipe engine oil off immediately if it is splashed.
7.Perform the following inspection if engine oil does not come out from intake or exhaust valve timing control solenoid valve oil hole of the cylinder head.
- Clean oil groove between oil strainer and intake or exhaust valve timing control solenoid valve. Refer to
Engine Lubrication System and Engine Lubrication System Schematic.
8.Remove components between intake valve timing control solenoid valve and camshaft sprocket (INT) or exhaust valve control solenoid valve and camshaft sprocket (EXH), and then check each oil groove for clogging.
- Clean oil groove if necessary. Engine Lubrication System and Engine Lubrication System Schematic.
9.After inspection, install removed parts in the reverse order.
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