Inspection

CAMSHAFT


Inspection


INSPECTION AFTER REMOVAL (EXHAUST SIDE)

Camshaft (EXH) Runout





1. Put V-block on precise flat table, and support No. 2 and 4 journals of camshaft.

CAUTION:
Never support No. 1 journal (on the side of camshaft sprocket) because it has a different diameter from the other three locations.
2. Set a dial indicator vertically to No. 3 journal.
3. Turn camshaft (EXH) to one direction with hands, and measure the camshaft runout on a dial indicator. (Total indicator reading)

Standard and limit : [1][2]Camshaft, Engine "Camshaft".

4. If it exceeds the limit, replace camshaft (EXH).

Camshaft (EXH) Cam Height





- Measure the camshaft (EXH) cam height with a micrometer.

Standard : [1][2]Camshaft, Engine "Camshaft".

- If wear exceeds the limit, replace camshaft (EXH).

Camshaft (EXH) Journal Oil Clearance

CAMSHAFT (EXH) JOURNAL DIAMETER





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

Standard : [1][2]Camshaft, Engine "Camshaft".

- Tighten VVEL ladder assembly bolts to the specified torque. Refer to "INSTALLATION" for the tightening procedure.





- Measure inner diameter (A) of VVEL ladder assembly (Exhaust side) with a bore gauge.

Standard : [1][2]Camshaft, Engine "Camshaft".

CAMSHAFT (EXH) JOURNAL OIL CLEARANCE
- (Oil clearance) = [VVEL ladder assembly (Exhaust side) inner diameter] � [Camshaft (EXH) journal diameter].

Standard and limit : [1][2]Camshaft, Engine "Camshaft".

- If the calculated value exceeds the limit, replace either or both camshaft (EXH) and VVEL ladder assembly and cylinder head assembly.

NOTE:
VVEL ladder assembly cannot be replaced as a single part, because it is machined together with cylinder head assembly.

Camshaft (EXH) End Play





- Install a dial indicator in thrust direction on front end of camshaft.
Measure the end play of a dial indicator when camshaft (EXH) is moved forward/backward (in direction of axis).

Standard and limit : [1][2]Camshaft, Engine "Camshaft".

- Measure the following parts if out of the limit.





- Dimension "A" for camshaft (EXH) No. 1 journal

Standard : 27.500 - 27.548 mm (1.0827 - 1.0846 in)

- Dimension "B" for cylinder head No. 1 journal bearing

Standard : 27.360 - 27.385 mm (1.0772 - 1.0781 in)

- Refer to the standards above, and then replace camshaft (EXH) and/or VVEL ladder assembly and cylinder head assembly.

NOTE:
Cylinder head assembly cannot be replaced as a single part,
because it is machined together with VVEL ladder assembly.

Camshaft Sprocket (EXH) Runout
1. Put V-block on precise flat table, and support No. 2 and 4 journals of camshaft (EXH).

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





2. Measure the camshaft sprocket (EXH) runout with a dial indicator. (Total indicator reading)

Limit : [1][2]Camshaft, Engine "Camshaft".

3. If it exceeds the limit, replace camshaft sprocket (EXH).

Valve Lifter (EXH)





- Check if surface of valve lifter has any wear or crack.
- If wear or crack is found, replace valve lifter (EXH). EM-
139, "Camshaft".

Valve Lifter Clearance (EXH)

VALVE LIFTER OUTER DIAMETER





- Measure the outer diameter at 1/2 height of valve lifter with a micrometer (A) since valve lifter is in barrel shape.

Standard : [1][2]Camshaft, Engine "Camshaft".

VALVE LIFTER HOLE DIAMETER





- Measure the inner diameter of valve lifter hole of cylinder head with an inside micrometer.

Standard : [1][2]Camshaft, Engine "Camshaft".

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

Standard : [1][2]Camshaft, Engine "Camshaft".

- If the calculated value is out of the standard, referring to each standard of valve lifter outer diameter and valve lifter hole diameter, replace either or both valve lifter and VVEL ladder assembly and cylinder head assembly.
NOTE:
Cylinder head assembly cannot be replaced as a single part, because it is machined together with VVEL ladder assembly.

INSPECTION AFTER REMOVAL (INTAKE SIDE)

Drive Shaft End Play





- Install a dial indicator in thrust direction on front end of drive shaft.
Measure the end play of a dial indicator when drive shaft is moved forward/backward (in direction of axis).

Standard and limit : [1][2]Camshaft, Engine "Camshaft".

- Measure the following parts if out of the limit.





- Dimension "A" for drive shaft No. 1 journal

Standard : 27.500 - 27.548 mm (1.0827 - 1.0846 in)

- Dimension "B" for cylinder head No. 1 journal bearing

Standard : 27.360 - 27.385 mm (1.0772 - 1.0781 in)

- If it exceeds the limit, replace VVEL ladder assembly and cylinder head assembly.
NOTE:
Cylinder head assembly cannot be replaced as a single part,
because it is machined together with VVEL ladder assembly.

Camshaft Sprocket (INT) Runout
1. Put V-block on precise flat table, and support No. 2 and 4 journals of drive shaft.
CAUTION:
Never support No. 1 journal (on the side of camshaft sprocket) because it has a different diameter from the other three locations.
2. Measure the camshaft sprocket (INT) runout with a dial indicator. (Total indicator reading)

Limit : [1][2]Camshaft, Engine "Camshaft".

3. If it exceeds the limit, replace camshaft sprocket (INT).

Valve Lifter (INT)





- Check if surface of valve lifter has any wear or crack.
- If wear or crack is found, replace VVEL ladder assembly and cylinder head assembly. [1][2]Camshaft, Engine.
NOTE:
Since the valve lifter (INT) cannot be replaced by the piece, VVEL ladder assembly and cylinder head assembly replacement are required.

Valve Lifter Clearance (INT)

VALVE LIFTER OUTER DIAMETER





- Measure the outer diameter at 1/2 height of valve lifter (INT) with a micrometer (A) since valve lifter is in barrel shape.

Standard : [1][2]Camshaft, Engine "Camshaft".

VALVE LIFTER HOLE DIAMETER





- Measure the inner diameter of valve lifter hole of cylinder head with an inside micrometer.

Standard : [1][2]Camshaft, Engine "Camshaft".

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

Standard : [1][2]Camshaft, Engine "Camshaft".

- If the calculated value is out of the standard, replace VVEL ladder assembly and cylinder head assembly.
NOTE:
Since the valve lifter (INT) cannot be replaced by the piece, VVEL ladder assembly and cylinder head assembly replacement are required.

VVEL Ladder Assembly

DRIVE SHAFT OPERATIONAL CHECK





- Hold the both ends of the drive shaft (A) and rotate it to check that it rotates smoothly.
CAUTION:
Turn VVEL ladder assembly upside down to prevent the drive shaft from dropping off.

CONTROL SHAFT OPERATIONAL CHECK





- Move control shaft (A) to the small stopper and large stopper to check that the control shaft functions smoothly.
CAUTION:
Turn VVEL ladder assembly upside down to prevent the drive shaft from dropping off.

LINK CHECK FOR BACK-LASH (BONDING)





- Check that the link and the shaft of drive shaft and control shaft are not fixed.
- Check this by moving drive shaft and control shaft in the axial and rotation directions.
- If there is an unusualness related to the above three, replace VVEL ladder assembly and cylinder head assembly.
NOTE:
VVEL ladder assembly cannot be replaced as a single part, because it is machined together with cylinder head assembly.

INSPECTION AFTER INSTALLATION

Inspection of Camshaft Sprocket (INT) Oil Groove
CAUTION:
- Perform this inspection only when DTC P0011, P0012 is detected in self-diagnostic results of CONSULT-III and it is directed according to inspection procedure of EC section. On Board Diagnostic (OBD) System Generic Scan Tool (GST) Function, "DIAGNOSIS-nosis Description"
.
- Check when engine is cold to prevent burns from the splashing engine oil.
1. Check engine oil level. Inspection.
2. Perform the following procedure to prevent the engine from being unintentionally started while checking.
a. Release the fuel pressure. Testing and Inspection.
b. Disconnect ignition coil and injector harness connectors. Exploded View.
3. Remove intake valve timing control solenoid valve. Exploded View.





4. Crank engine, and then check that engine oil comes out from intake valve timing control solenoid valve hole (A). End crank after checking.

1 : Intake valve timing control cover (bank 1)
Arrow: Engine Front

WARNING:
Be careful not to touch rotating parts (drive belt, idler pulley, and crankshaft pulley, etc.).
CAUTION:
- Prevent splashing by using a shop cloth to prevent the worker from injury from engine oil and to prevent engine oil contamination.
- Prevent splashing by using a shop cloth to prevent engine oil from being splashed to engine and vehicle. Especially, be careful no to apply engine oil to rubber parts of drive belt, engine mounting insulator, etc. Wipe engine oil off immediately if it is splashed.
5. Perform the following inspection if engine oil does not come out from intake valve timing control solenoid valve oil hole of the cylinder head.
- Remove oil filter, and then clean it. Exploded View.
- Clean oil groove between oil strainer and intake valve timing control solenoid valve. Engine Lubrication System Engine Lubrication System Schematic, "Engine Lubrication System".
6. Remove components between intake valve timing control solenoid valve and camshaft sprocket (INT), and then check each oil groove for clogging.
- Clean oil groove if necessary. Engine Lubrication System.
7. After inspection, install removed parts in the reverse order.

Inspection for Leakage

The following are procedures for checking fluid leakage, lubricant leakage.
- Before starting engine, check oil/fluid levels including engine coolant and engine oil. If any are less than the required quantity, fill them to the specified level. Maintenance.
- Follow the procedure below to check for fuel leakage.
- Turn ignition switch to the "ON" position (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leakage at connection points.
- Start engine. With engine speed increased, check again for fuel leakage at connection points.
- Run engine to check for unusual noise and vibration.

NOTE:
If hydraulic pressure inside chain tensioner drops after removal/installation, slack in guide may generate a pounding noise during and just after the engine start. However, this does not indicate a malfunction. The noise will stop after hydraulic pressure rises.
- Warm up engine thoroughly to check that there is no leakage of fuel, or any oil/fluids including engine oil and engine coolant.
- Bleed air from lines and hoses of applicable lines, such as in cooling system.
- After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill them to the specified level, if necessary.