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 MANUALSVOLVO1987240 GL, 4D SEDAN, AUTOMATIC, AW70REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMPCV SYSTEMDESCRIPTION

1987 Volvo 240 GL, 4D Sedan, Automatic, AW70

PCV System: Description

1987 Volvo 240 GL, 4D Sedan, Automatic, AW70SECTION Description

Closed crankcase ventilation systems usually consist of one or more of the following: PCV valve, oil separator, blow-by filter and connecting hoses. For illustration of typical PCV systems, See Figure to Figure .

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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.