Inspection
CAMSHAFT
Inspection
INSPECTION AFTER REMOVAL
Camshaft 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 to one direction with hands, and measure the camshaft runout on a dial indicator. (Total indicator reading)
Standard and limit : Refer to "Camshaft" [1][2]Camshaft, Engine.
4. If it exceeds the limit, replace camshaft.
Camshaft Cam Height
1. Measure the camshaft cam height with a micrometer.
Standard cam height(Intake and exhaust) : Refer to "Camshaft" [1][2]Camshaft, Engine.
Cam wear limit : Refer to "Camshaft" [1][2]Camshaft, Engine.
2. If wear exceeds the limit, replace camshaft.
Camshaft Journal Oil Clearance
CAMSHAFT JOURNAL DIAMETER
- Measure the outer diameter of camshaft journal with a micrometer
(A).
Standard : Refer to "Camshaft" [1][2]Camshaft, Engine.
CAMSHAFT BRACKET INNER DIAMETER
- Tighten camshaft bracket bolt with the specified torque. Refer to "INSTALLATION" for the tightening procedure.
- Measure inner diameter (A) of camshaft bracket with a bore gauge.
Standard : Refer to "Camshaft" [1][2]Camshaft, Engine.
CAMSHAFT JOURNAL OIL CLEARANCE
- (Oil clearance) = (Camshaft bracket inner diameter) � (Camshaft journal diameter).
Standard and limit : Refer to "Camshaft" [1][2]Camshaft, Engine.
- If the calculated value exceeds the limit, replace either or both camshaft and cylinder head.
NOTE:
Camshaft brackets cannot be replaced as single parts, because there are machined together with cylinder head. Replace whole cylinder head assembly.
Camshaft End Play
- Install a dial indicator in thrust direction on front end of camshaft.
Measure the end play of a dial indicator when camshaft is moved forward/backward (in direction to axis).
Standard and limit : Refer to "Camshaft" [1][2]Camshaft, Engine.
- Measure the following parts if out of the limit.
- Dimension "A" for camshaft 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 and/or cylinder head.
Camshaft Sprocket 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. Measure the camshaft sprocket runout with a dial indicator.
(Total indicator reading)
Limit : Refer to "Camshaft" [1][2]Camshaft, Engine.
- 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. [1][2]Camshaft, Engine.
Valve Lifter Clearance
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 (Intake and exhaust) : Refer to "Camshaft" [1][2]Camshaft, Engine.
VALVE LIFTER HOLE DIAMETER
- Measure the inner diameter of valve lifter hole of cylinder head with an inside micrometer.
Standard (Intake and exhaust) : Refer to "Camshaft" [1][2]Camshaft, Engine.
VALVE LIFTER CLEARANCE
- (Valve lifter clearance) = (Valve lifter hole diameter) � (Valve lifter outer diameter)
Standard (Intake and exhaust) : Refer to "Camshaft" [1][2]Camshaft, Engine.
- 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 cylinder head.
INSPECTION AFTER INSTALLATION
Inspection of Camshaft Sprocket (INT) Oil Groove
CAUTION:
- Perform this inspection only when DTC P0011, P0021 is detected in self-diagnostic results of CONSULT-III and it is directed according to inspection procedure of EC section. P0011, "DIAG-
nosis Procedure".
- Check when engine is cold so as to prevent burns from the splashing engine oil.
1. Check engine oil level. 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. Disconnect ignition coil and injector harness connectors. Exploded View and Exploded View Removal And Installation, "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 : 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 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 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 fluids leakage, lubricates leakage.
- Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required quantity, fill to the specified level.
- Use procedure below to check for fuel leakage.
- Turn ignition switch "ON" (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 timing chain tensioner drops after removal/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.
- Warm up engine thoroughly to check 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 to the specified level, if necessary.
