Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Timing Inspection
2015 Kia Optima SX TurboSECTION Timing Inspection
WARNING: This page is about a different variant/trim than selected.
- Set up an oscilloscope as follows :
Channel A (+): Signal terminal of the CMPS #1 (back probe), (-): ground
Channel B (+): Signal terminal of the CKPS (back probe), (-): ground
- Start the engine and check for signal waveform compared with reference waveform below.
- There are 60 signals of CKPS (Including missing tooth) during the semi-cycle of CMPS #1.
- There are 3~5 signals of CKPS between the switching point of CMPS #1 and the missing tooth of CKPS.
- Is the signal waveform normal?
YES
- Go to next step as indicated below.
NO
- Repair or readjust as necessary, if air gap of the CKPS is exceeds specification (0.3~1.7 mm (0.012~0.067 in)). If OK, check that the crankshaft and camshaft are correctly aligned the matching marks of the pulleys. Repair or readjust as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.