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.
Engine mount control: Function
The changeover valve connects the engine mounts to the vacuum supply. When activated by the DDE master control module, the changeover valve switches vacuum to the engine mounts which in turn switch to "soft".
The engine mounts are activated as follows:
- From "soft" to "hard" when 1050 rpm is exceeded
- From "hard" to "soft" when 950 rpm is not reached
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.