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.
1978 MG MidgetFACTORY OEM SERVICE PROCEDURE
Exhaust Gas RECIRCULATION: Maintenance
- Remove EGR valve and clean base of valve with a wire brush. Using a spark plug cleaner, clean valve seat and metering valve by holding the diaphragm upward. Blast valve at 30 second intervals until clean.
- Remove all traces of carbon and cleaning compound (from spark plug cleaner) using compressed air. Inspect ports in manifold for carbon build-up. Light deposits are acceptable.
- If heavy deposits have accumulated, the manifold must be removed for cleaning. Install EGR valve and bring engine to normal operating temperature. Repeat EGR test.
Factory Service Tools
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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.
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