Volvo 242/244/245, Known Issues and Common Problems
Overview
The Volvo 240 is legendarily tough, but let’s be straight: these cars are now pushing 30-50 years old. Most problems you’ll encounter are age-related rather than design flaws. Swedish engineering was conservative and overbuilt, which is why so many are still on the road. But rubber perishes, metal corrodes, and anything exposed to decades of oil, road salt, and heat will eventually fail.
If you’re buying a 240, accept that you’re taking on an old car. Budget for maintenance. The good news? Parts are cheap, plentiful, and the cars are dead simple to work on. Most issues can be fixed in a driveway with basic tools. The bad news? Deferred maintenance compounds quickly, and a neglected 240 can become a money pit.
These are not collector cars. They’re usable classics. Drive them, fix them, repeat.
Engine
Oil leaks from valve cover, front crank seal, and rear main seal
What happens: 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.
Why it happens: Rubber gaskets and seals harden with age and heat. The B21/B23 red-block engine runs warm, and if the PCV system is clogged, crankcase pressure forces oil past every seal it can find. Valve cover nuts also loosen over time.
How to fix it: Before replacing gaskets, check and clean the PCV system (see below). For the valve cover, torque the nuts to 60 Nm (not more, you’ll crack the cover). If that doesn’t stop the leak, replace the valve cover gasket and the half-moon rubber seals at the cam towers. Use genuine Volvo or Elring gaskets.
Front crank seal is best done during a timing belt change. Rear main seal requires gearbox removal. Don’t ignore a weeping rear main, once it starts pouring, you’ve got a big job. Some owners live with a slow seep and just check oil regularly.
Severity: Minor annoyance initially, but a clogged PCV can turn it into a mess. Rear main seal failure is a weekend-killer.
Clogged PCV system (flame trap, oil separator box)
What happens: Oil leaks from multiple places, rough idle, high oil consumption, smoke from the engine bay. Sometimes the oil filler cap pops off under pressure.
Why it happens: The PCV (positive crankcase ventilation) system recirculates blow-by gases. The flame trap (a mesh filter) and oil separator box get clogged with sludge, especially on short-trip cars. Blocked breathers create crankcase pressure, which forces oil past every seal.
How to fix it: Replace the flame trap (cheap, about $5-10, part lives under the intake manifold) and clean or replace the oil separator box. Volvo designed this as a service item, but many owners forget it exists. Also replace any collapsed or oil-soaked breather hoses. Do this every 50,000 km or if you see oil leaks appearing everywhere at once.
Severity: Urgent if symptoms are present. Cheap fix, no excuses for ignoring it.
Piston ring wear and oil consumption (LH 2.4 engines, 2010-2018 T5/T6)
What happens: 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.
Why it happens: Some LH 2.4 and modern T5/T6 engines (pre-2019) had piston ring issues. Rings don’t seal properly, allowing oil into the combustion chamber. 240s with the B21/B23 are generally bulletproof, but high-mileage examples may show some consumption.
How to fix it: On 240s, if consumption is excessive (more than 1L per 1,000 km), check compression and consider a rebuild or engine swap. Rings can be replaced, but it’s a big job. For newer Volvos, this often requires new pistons and rings under warranty or recall. On the 240, it’s usually just age.
Severity: Needs attention if consumption is high. Budget for a rebuild or live with topping up.
Timing belt and water pump failure
What happens: Belt snaps, engine stops immediately. If it’s an interference engine (all B21/B23 are), valves hit pistons. Game over. Water pump failure causes overheating, coolant loss.
Why it happens: Timing belts are a wear item. Volvo says 10 years or 100,000 km (160,000 km on later four-cylinders). Water pumps fail from bearing wear or seal leakage.
How to fix it: Replace the timing belt, tensioner, and idler pulleys as a kit. Do the water pump at the same time, it’s right there, and the labour overlaps. Use OEM or quality aftermarket (Aisin, Gates). Torque the crank pulley nut to spec and align timing marks carefully. If you’ve never done this, get a mate who has or pay someone. Bentley or Haynes manual walks you through it.
Severity: Urgent. This is not negotiable. If the belt’s age or history is unknown, do it immediately.
Fuel injector clogging and leaking (K-Jetronic, LH 2.2/2.4)
What happens: Rough idle, hesitation, hard starting, fuel smell. One or more cylinders run lean or rich. LH 2.4 injectors (yellow-top) can leak when hot.
Why it happens: Old fuel leaves varnish deposits. Injectors clog or seals perish. The 240’s continuous injection system (K-Jetronic or LH) is sensitive to fuel quality. Leaking injectors wash down cylinder walls, dilute oil, and create a fire risk.
How to fix it: Remove injectors, send them for ultrasonic cleaning and flow testing (many shops do this for $10-20 per injector). Replace O-rings and seals. If they’re beyond saving, get a tested set from a breaker or buy new. For LH 2.2, use black-top injectors. LH 2.4 uses yellow-tops. Do not mix them, different flow rates.
Severity: Needs attention. Leaking injectors are a fire hazard.
Fuel pump and relay failure
What happens: Car cranks but won’t start, or cuts out randomly. Sometimes you’ll hear the pump prime when you turn the ignition on; other times, silence.
Why it happens: The fuel pump relay (white plastic block, usually under the driver’s seat or in the engine bay) is a known weak point. Contacts corrode or the solder joints crack. Pumps themselves can fail, especially if the tank’s run low and sucked up debris.
Why it happens (in-tank pre-pump): 240s from about 1978 onward have a lift pump in the tank to prevent vapour lock. This can fail, causing hard starting or hesitation under load.
How to fix it: Swap the relay first, cheap, easy. If that doesn’t work, bridge terminals 2 and 30 (or 87 and 30, depending on type) with a wire to manually run the pump for testing. If the pump runs, replace the relay. If not, check the pump itself. Pre-pump replacement involves dropping the fuel tank. Main pump is under the car near the rear axle (early cars) or in-tank (later ones). Use a Bosch or genuine Volvo pump.
Severity: Urgent when it fails, but usually gives warning (intermittent no-starts).
Cooling System
Leaking radiator, hoses, and heater core
What happens: Coolant drips or puddles under the car, sweet smell, overheating, steam from under the bonnet. Heater core leaks soak the passenger footwell.
Why it happens: Original brass/copper radiators corrode from the inside out, especially if the coolant’s been neglected. Plastic end tanks crack. Rubber hoses perish. Heater cores rot from acidic coolant or road salt (they’re buried in the heater box).
How to fix it: Replace the radiator with an aluminium aftermarket unit (cheaper and more effective than OEM). Replace all coolant hoses, top, bottom, heater feed, heater return, and any small bypass hoses. Use proper hose clamps (worm-drive, not spring). Heater core replacement is a dashboard-out job; budget 6-8 hours. Some people bypass it if they don’t need heat, but that’s a bodge.
Flush the system and refill with 50/50 ethylene glycol (blue or green universal coolant). Change it every 3-5 years. Neglected coolant turns acidic and eats everything.
Severity: Needs attention before it overheats. Heater core failure is a major pain.
Thermostat sticking or failing
What happens: Engine runs cold (heater barely works, fuel economy drops) or overheats. Temperature gauge behaves erratically.
Why it happens: Thermostats wear out or get stuck open/closed. Some previous owners fit the wrong temperature unit (82°C vs 92°C). The 240 runs best at 92°C, it reduces piston slap and improves fuel economy.
How to fix it: Replace the thermostat with a 92°C unit (genuine Volvo or quality aftermarket). Make sure the jiggle pin (small brass valve) is at 12 o’clock when you install it, this lets air bleed out. Refill the system slowly to avoid air pockets.
Severity: Minor to moderate, depending on symptoms. Overheating is urgent.
Water pump bearing failure and seal leakage
What happens: Coolant drips from the weep hole on the pump, or you hear a grinding/squealing noise from the front of the engine. Overheating follows.
Why it happens: Bearings wear, seals perish. Water pumps are a wear item.
How to fix it: Replace the pump. Do it when you do the timing belt, same area, overlapping labour. Torque bolts evenly in a cross pattern. Use a new gasket and O-ring. Silicon grease on the O-ring helps installation.
Severity: Urgent when symptoms appear. Plan ahead and do it with the belt.
Coolant temperature sensor and gauge issues
What happens: Temperature gauge reads wrong, or warning light comes on when the engine’s not actually hot.
Why it happens: The sensor (green two-pin unit on the thermostat housing) fails or its wiring corrodes. Sometimes the gauge itself goes bad.
How to fix it: Test the sensor with a multimeter (resistance drops as temperature rises). Replace if faulty. Check wiring and clean connectors. If the gauge is dead, you might need a new instrument cluster or a sensor mismatch (single-pin vs two-pin).
Severity: Needs attention, you’re flying blind without it.
Fuel System
Leaking fuel pressure regulator
What happens: Fuel smell, rough running, black smoke, poor fuel economy. You might see fuel dripping from the vacuum line or the regulator itself.
Why it happens: The diaphragm inside the regulator splits. Fuel gets sucked into the intake via the vacuum line, richening the mixture. Or it leaks externally.
How to fix it: Replace the regulator. Disconnect the vacuum line and check for fuel inside, if you see any, the diaphragm’s gone. Use genuine Volvo or Bosch. Pressure should be 2.5 bar on LH 2.2, 3 bar on LH 2.4. Don’t mix them, wrong pressure causes running issues.
Severity: Urgent if leaking externally (fire risk). Needs attention if internal.
Blocked fuel filter
What happens: Hesitation under load, stalling, won’t rev past a certain point, hard starting.
Why it happens: The inline fuel filter (big metal canister under the car, passenger side near the tank) gets clogged with rust and debris from old fuel tanks. Volvo filters are huge and last a long time, which is why people forget to change them.
How to fix it: Replace the filter every 50,000 km or when symptoms appear. Make sure you fit it the right way, arrow points toward the engine. Relieve fuel pressure first (pull the pump relay, crank the engine until it dies). Have rags ready, it’ll spill.
Severity: Needs attention. Won’t strand you immediately, but it will.
Air leaks in intake system (LH 2.4 mass airflow sensor)
What happens: Rough idle, hesitation, poor fuel economy, check engine light. Engine may stall.
Why it happens: The rubber accordion hose between the MAF sensor and throttle body cracks. Unmetered air enters, confusing the ECU. Also check for vacuum leaks at the intake manifold gasket, idle air control valve, and brake booster hose.
How to fix it: Replace the intake hose (cheap, about $20). Inspect and replace any cracked vacuum lines. Spray carb cleaner around suspected leak points with the engine running, if the idle changes, you’ve found it. Clean the MAF sensor with MAF-specific cleaner (CRC or similar). Do not use anything else, you’ll destroy the fragile hot-wire element.
Severity: Needs attention. Driveability suffers badly.
Electrical
Fuse box corrosion and composite fuse failure
What happens: Intermittent electrical gremlins, wipers stop, lights flicker, fuel pump cuts out, gauges go dead. You’ll chase your tail trying to diagnose.
Why it happens: The composite (blade-style) fuses in the main fuse box corrode or crack internally. They look fine but have failed. The fuse holders also corrode. The main power supply fuse for the LH fuel system (25A white holder, under the bonnet) is a common culprit, it melts the plastic housing from heat and resistance.
How to fix it: Replace any suspect fuses, even if they look OK. Keep spares in the car (IPD sells kits). Upgrade the main fuel system fuse holder to a waterproof type to prevent future meltdown. Clean fuse box terminals with contact cleaner and dielectric grease.
Severity: Minor annoyance to urgent, depending on what fails. Check it during any electrical diagnosis.
Fuel pump relay failure (covered above under Engine, but worth repeating)
What happens: No start, or engine cuts out while driving.
Why it happens: Relay contacts corrode or solder joints crack. Very common.
How to fix it: Swap relay, or bridge terminals to test. Carry a spare relay and a jumper wire.
Severity: Urgent when it fails.
Headlight relay and wiring overheating
What happens: Headlights dim or fail, melted connector at the relay, burnt smell.
Why it happens: Too much current through undersized wiring. The relay and its connector overheat and melt. Happens on nearly every 240 eventually.
How to fix it: Replace the relay and connector with a higher-quality setup. Some people re-wire with heavier gauge wire and modern relays. At minimum, clean the terminals, apply dielectric grease, and keep an eye on it.
Severity: Needs attention. Driving at night without lights will ruin your day.
Bulb failure sensor issues
What happens: Brake lights or turn signals stop working, even though the bulbs are fine. Warning light on the dash.
Why it happens: Volvo used a bulb integrity sensor to monitor voltage to each bulb. When it fails, you lose all brake lights (common) or other lights.
How to fix it: Test the sensor with a multimeter (check the Bentley manual for procedure). Replace if faulty. It’s inline with the wiring, usually near the fuse box.
Severity: Urgent if you’ve lost brake lights. Illegal and dangerous.
Transmission and Drivetrain
Worn transmission mounts (manual and auto)
What happens: Clunking when you shift or accelerate, excessive vibration, difficulty engaging gears. The shifter feels loose or notchy.
Why it happens: Rubber transmission mount deteriorates. It’s on the back of the gearbox, bolted to the crossmember. Engine movement transfers into the cabin.
How to fix it: Replace the mount (about $40-60). Jack up the gearbox slightly, remove the old mount, fit the new one. While you’re there, check the engine mounts, they often fail at the same time.
Severity: Needs attention. Won’t strand you, but it’s annoying and damages other components.
Rear differential whine or clunking
What happens: Whining noise from the rear, especially on deceleration or under load. Clunking when you take up the drive.
Why it happens: Differential bearings wear, or backlash increases in the ring and pinion. Low or contaminated oil makes it worse. The Dana 30 diff in the 240 is tough, but not indestructible.
How to fix it: Check the diff oil level (there’s a fill plug on the front of the diff). Top up with 75W-90 GL-5 gear oil. If it’s still noisy, the diff may need a rebuild or replacement. Some noise is normal, they all hum a bit.
Severity: Minor to moderate. If it’s loud or getting worse, have it looked at.
Worn driveshaft carrier bearing
What happens: Vibration or rumbling from under the car, especially at motorway speeds.
Why it happens: The centre support bearing (carrier bearing) on the two-piece driveshaft wears out. The rubber mount perishes.
How to fix it: Replace the carrier bearing and rubber mount (about $50-80 for the assembly). Requires dropping the driveshaft. Not difficult, just messy.
Severity: Needs attention before the vibration gets bad.
Suspension and Steering
Worn front control arm bushings and ball joints
What happens: Clunking over bumps, steering wander, uneven tyre wear (inside edge), pulling to one side. Failed MOT.
Why it happens: The front control arms have bushings at both ends and a ball joint. All wear out with age and mileage. Ball joints fail catastrophically if ignored.
How to fix it: Replace the entire control arm (cheaper and easier than pressing in new bushings). Ball joints can be replaced separately, but arms are so cheap ($30-50 each), it’s not worth the hassle. Use genuine Volvo or Meyle HD parts.
Severity: Urgent if ball joints are loose. Needs attention for bushings.
Steering rack leaks and worn tie rod ends
What happens: Power steering fluid leaks from the rack (usually at the pinion seal or end seals). Steering feels loose or vague. Clunking when you turn. Outer tie rod ends wear, causing play.
Why it happens: Rack seals perish. Tie rod ends are a wear item. The 240’s steering is robust, but not immune.
How to fix it: Small leaks can be lived with for a while, just top up the fluid. Major leaks require a rack rebuild or replacement. Tie rod ends are cheap and easy (about $20-30 each, plus alignment). Use a pickle fork or tie rod puller to separate them.
Severity: Needs attention if leaking badly or if tie rods have play.
Worn strut top mounts and bearings
What happens: Clunking from the front over bumps, steering feels notchy or doesn’t self-centre, uneven tyre wear (weird camber shifts).
Why it happens: The strut top hat bearing breaks or the rubber mount collapses. This allows the strut to move around, changing camber and caster on the fly.
How to fix it: Replace the strut top mounts (IPD HD or OEM). You can do this without removing the springs if you’re careful, but it’s easier with spring compressors. Check the bearings, if they’re crunchy or missing, replace them.
Severity: Needs attention. Tyre wear and poor handling make this a safety issue.
Sagging rear springs
What happens: Rear end sits low, poor handling, bottoms out over bumps.
Why it happens: Springs sag with age. Wagons are worse (they carried more weight).
How to fix it:
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