In-Vehicle Repair

Valve Springs

Special Tool(s):

Material:

Removal

CAUTION: During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces, that enters the oil passages, coolant passages or the oil pan can cause engine failure.

1. With the vehicle in NEUTRAL, position it on a hoist.

2. Remove the camshafts.

3. CAUTION: If the camshafts and valve tappets are to be reused, mark the location of the valve tappets to make sure they are assembled in their original positions.

NOTE: The number on the valve tappets only reflects the digits that follow the decimal. For example, a tappet with the number 0.650 has the thickness of 3.650 mm.

Remove and inspect the valve tappets.
4. Remove the spark plugs.

5. WARNING: Always wear protective goggles when working with compressed air. This can prevent injury. Failure to follow these instructions can result in personal injury.

CAUTION: Use compressed air at 7 to 10 bars (100-150 psi). Do not disconnect the compressed air from the cylinder until the valve spring, valve spring retainer and valve collet is installed.

Connect compressed air supply to the No. 1 cylinder.

6. NOTE: Place all parts in order to one side.

Apply compressed air to the cylinder and remove the valve spring.
^ Using the special tools, compress the valve spring and remove the valve collet, using some grease and a small screwdriver.
^ Remove the valve spring retainer and the valve spring.





Installation

1. NOTE: Check the seating of the valve collet.

Using the special tools, install the valve spring.
^ Insert the valve spring and the valve spring retainer.
^ Compress the valve spring and install the valve collet using some grease and a small screwdriver.





2. Disconnect the compressed air supply.
3. Repeat the appropriate removal and installation steps for all of the other cylinders.
4. Install the spark plugs.
5. Coat the valve tappets with clean engine oil and insert them.
6. Install the camshafts.