CVVT & Camshaft: Inspection: Camshaft

Using a micrometer, measure the cam lobe height.

Cam height 

[Standard value]

Intake: 47.2 mm (1.835 in.)

Exhaust: 45.8 mm (1.803 in.)

Courtesy of KIA MOTORS AMERICA, INC.

If the cam lobe height is below specification, replace the camshaft.

1. Clean the bearing caps and camshaft journals.
2. Place the camshafts on the cylinder head.
3. Lay a strip of plastigage across each of the camshaft journals.

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4. Install the bearing cap (A) and thrust bearing cap (B) to the specified torque.

   Tightening torque 

   Step 1: 5.8 N.m (0.6 kgf.m, 4.3 lb.ft, 52.1 lb.in)

   Step 2: 9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb.ft)

   Courtesy of KIA MOTORS AMERICA, INC.

   Courtesy of KIA MOTORS AMERICA, INC.

   NOTE: Do not turn the camshaft.
5. Remove the bearing caps.
6. Measure the plastigage at its widest point.

   Bearing oil clearance 

   [Standard value]

   Intake

   No. 1 journal: 0.037 - 0.067 mm (0.0015 - 0.0026 in.)

   No. 2, 3, 4 journal: 0.030 - 0.067 mm (0.0012 - 0.0026 in.)

   Exhaust

   No. 1 journal: 0.027 - 0.057 mm (0.0010 - 0.0022 in.)

   No. 2, 3, 4 journal: 0.030 - 0.067 mm (0.0012 - 0.0026 in.)

   Courtesy of KIA MOTORS AMERICA, INC.

   • If the oil clearance is greater than specification, replace the camshaft.
   • If the oil clearance is still over the specification after replacing the camshaft, replace the bearing caps and cylinder head as an assembly.
7. Completely remove the plastigage.
8. Remove the camshafts.

1. Install the camshafts.
2. Install the bearing cap (A) and thrust bearing cap (B) to the specified torque.

   Tightening torque 

   Step 1: 5.8 N.m (0.6 kgf.m, 4.31 lb.ft, 52.1 lb.in)

   Step 2: 9.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb.ft)

   Courtesy of KIA MOTORS AMERICA, INC.

   Courtesy of KIA MOTORS AMERICA, INC.

3. Using a dial indicator, measure the end play while moving the camshaft back and forth.

   Camshaft end play 

   [Standard value]

   Intake: 0.04 - 0.18 mm (0.0016 - 0.0071 in.)

   Exhaust: 0.02 - 0.18 mm (0.0008 - 0.0071 in.)

   Courtesy of KIA MOTORS AMERICA, INC.

   Courtesy of KIA MOTORS AMERICA, INC.

   • If the end play is greater than specification, replace the camshaft.
   • If the end play is still over the specification after replacing the camshaft, replace the bearing caps and cylinder head as an assembly.
4. Remove the camshafts.