1974-1993 / Sedan / Estate / Sweden
No start, or engine cuts out while driving.
Relay contacts corrode or solder joints crack. Very common.
Swap relay, or bridge terminals to test. Carry a spare relay and a jumper wire.
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Submit an updateIntermittent electrical gremlins, wipers stop, lights flicker, fuel pump cuts out, gauges go dead. You'll chase your tail trying to diagnose.
Headlights dim or fail, melted connector at the relay, burnt smell.
Brake lights or turn signals stop working, even though the bulbs are fine. Warning light on the dash.
Seepage or drips from the valve cover gasket, front timing cover, or rear of the engine. Oil may pool on top of the gearbox bell housing or drip onto the subframe. You'll smell burning oil if it hits the exhaust.
Oil leaks from multiple places, rough idle, high oil consumption, smoke from the engine bay. Sometimes the oil filler cap pops off under pressure.
Engine burns oil between changes, blue smoke on startup or acceleration. Spark plugs may foul. Not specific to the 240, but worth noting for anyone considering newer Volvos.