For 1990-2009 cars

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Does the engine knock at idle when hot? | -- | Go to Step 2 | System OK
2 | Inspect the drive belts. Are the belt loose or worn? | -- | Go to Step 3 | Go to Step 4
3 | Tension or replace the belts, as necessary. Is the repair complete? | -- | Go to Step 1 | --
4 | Inspect the A/C compressor and the generator. Is either the compressor or the generator faulty? | -- | Go to Step 5 | Go to Step 6
5 | Replace the faulty A/C compressor or the generator. Is the repair complete? | -- | Go to Step 1 | --
6 | Inspect the valve train. Are valve train components faulty? | -- | Go to Step 7 | Go to Step 8
7 | Replace faulty valve train components. Is the repair complete? | -- | Go to Step 1 | --
8 | Inspect the engine oil. Is the proper viscosity oil used in the crankcase? | -- | Go to Step 10 | Go to Step 9
9 | Install oil of the proper viscosity for the expected seasonal temperatures. Is the repair complete? | -- | Go to Step 1 | --
10 | Inspect the piston pin clearance. Is the clearance more than the specified value? | 0.014 mm (0.0005 in) | Go to Step 11 | Go to Step 12
11 | Replace the piston and the pin. Is the repair complete? | -- | Go to Step 1 | --
12 | Inspect the connecting rod alignment. Is the alignment faulty? | -- | Go to Step 13 | Go to Step 14
13 | Inspect and replace rods as necessary. Is the repair complete? | -- | Go to Step 1 | --
14 | Inspect the piston-to-bore clearance. Is the clearance equal to the specified value? | 0.03 mm (0.0012 in) | Go to Step 16 | Go to Step 15
15 | Hone the bore and fit a new piston. Is the repair complete? | -- | Go to Step 1 | --
16 | Inspect the crankshaft balancer. Is the balancer loose? | -- | Go to Step 17 | Go to Step 18
17 | Torque or replace worn parts. Is the repair complete? | -- | Go to Step 1 | --
18 | Measure the piston pin offset toward the thrust side. Is the offset equal to the value specified? | 0.8 mm (0.031 in) | Go to Step 19 | System OK
19 | Install the correct piston. Is the repair complete? | -- | Go to Step 1 | --