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.
PREGLOW System
The pencil element glow plugs are comprised of a housing with screw-in threads. A heater bar is also pressed into the housing. The single-pole connecting bolt is screwed to housing by means of a non-releasable round brass nut. The pencil element glow plugs are designed for a voltage of 11.5 volts and are operated as a parallel circuit.
The heating element consists of a heating and control winding connected in series. When the glow system is switched on, a current of approximately 30 amps will flow to each glow plug.
The winding increases its resistance with increasing temperature and limits the current to approximately 8-15 amps. This will protect the glow plug against overload. After a glow time of 9 seconds, a heater bar temperature of approximately 1500°F (900°C) will be attained.
Use the Manual With the Right Hardware
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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.