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.
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HOMESERVICE MANUALSJEEP1985CJ-7 L6-258 4.2L VIN C 2-BBLREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSSERVICE AND REPAIR
1985 Jeep CJ-7 L6-258 4.2L VIN C 2-bbl
Emission Control Systems: Service and Repair
1985 Jeep CJ-7 L6-258 4.2L VIN C 2-bblSECTION Service and Repair
CTO VALVE, REPLACE
4-151, 6-258 & V8-360
1. Drain a sufficient amount of coolant from radiator to bring fluid level below CTO valve.
2. Identify and tag CTO valve vacuum hoses and disconnect hoses from valve.
3. Place a suitable drain pan directly below CTO valve and remove valve from thermostat housing.
4. Reverse procedure to install.
6-258 & V8-360
1. Drain coolant from radiator.
2. On V8 engines, remove air cleaner assembly.
3. Identify and tag vacuum hoses and disconnect from valve.
4. On six cylinder engines, place a suitable drain pan directly beneath CTO valve.
5. Remove valve from intake manifold or engine block on six cylinder engines, or from thermostat housing or intake manifold on V8 engines.
6. Reverse procedure to install.
NON-LINEAR VACUUM REGULATOR (NLVR) VALVE, REPLACE
6-258 & V8-360
1. Identify and tag vacuum hoses and disconnect from valve.
2. Remove valve.
3. Reverse procedure to install.
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.