142 / 144 / 145
1966-1974 / Sedan / Estate / Sweden
Photo: Photo by Niels de Wit from Lunteren, The Netherlands / Wikimedia Commons CC BY 2.0
The 140 series replaced the Amazon and introduced Volvo's new naming convention: first digit for series, second for cylinders, third for doors. More importantly, it introduced crumple zones and a safety cell body structure that would define Volvo's engineering philosophy for decades. The car was bigger, more modern, and just as solidly built as the Amazon it replaced.
The 145 estate became the quintessential Volvo shape, establishing the boxy wagon look that the brand would carry through to the 240 and beyond. In Australia, the 140 series was popular with families who wanted something tougher than the typical Australian six-cylinder sedans. The B20 engine is nearly indestructible, and parts remain available through the strong Volvo club network. Good examples are getting harder to find as even the youngest cars are now over 50 years old.
Thinking of buying a 142 / 144 / 145?
What to look for, what to pay, what to avoid.
What to watch for.
Oil Leaks from Front and Rear Crankshaft Seals
Common Engine
Oil Leaks from Front and Rear Crankshaft Seals
CommonPersistent weeping or pooling of oil beneath the engine, especially at the front timing cover or rear main seal area. You'll see oil misting onto the bellhousing or dripping from the sump.
Age. The original rope-type rear main seal and lip seals up front harden and lose elasticity after decades. Heat cycling and long service intervals accelerate deterioration.
Front seal: straightforward when doing the timing belt, pull the crank pulley, pry out the old seal, tap in a new one (lip facing inward), reassemble. Rear main: gearbox-out job. On early B18/B20 engines, a rope seal is shimmed into the block and cap; later B20s use a lip seal. Use OEM Volvo seals or quality aftermarket (Elring, Reinz). While you're in there, replace the sump gasket and cork end seals, they're cheap insurance. Torque sump bolts progressively to avoid distortion.
Worn Valve Guides and Oil Consumption
Common Engine
Worn Valve Guides and Oil Consumption
CommonBlue smoke on startup or deceleration, fouled spark plugs, rising oil consumption between changes (more than half a litre per 1,000 km).
Valve stem seals harden and crack; valve guides wear oval. The B18 and B20 were never designed for modern extended oil change intervals, and many have seen neglect.
Start with valve stem seals, they can be done head-on with a spring compressor and a bit of patience. If guides are worn beyond spec (check with a dial gauge), they'll need knurling or replacement. A full valve job isn't expensive at a competent machine shop. While the head's off, lap the valves, check the seats, and replace the head gasket. Torque head bolts to spec in the correct sequence, critical to avoid warping.
Carburettor Issues (SU or Zenith-Stromberg)
Common Engine
Carburettor Issues (SU or Zenith-Stromberg)
CommonRough idle, hesitation, stalling when cold, flat spots under acceleration, poor fuel economy, black exhaust smoke.
Gummed-up jets, worn throttle spindles, perished diaphragms, incorrect float height, or vacuum leaks. Ethanol in modern fuel accelerates varnish buildup.
Strip and rebuild the carbs using a proper kit (needle, jet, diaphragm, float valve). Soak the bodies in carb cleaner, blow out all passages with compressed air, set float height to spec. Check throttle spindle play, if excessive, bushings are available or the body can be sleeved. Balance the carbs (on twin setups) using a Unisyn or vacuum gauges. Don't ignore vacuum hoses, any split or perished hose will lean out the mixture and cause erratic running.
Worn Timing Chain or Belt Tensioner
Critical Engine
Worn Timing Chain or Belt Tensioner
CriticalRattling or slapping noise from the front of the engine, especially on startup or idle. Loss of power, poor running, or misfires if timing has jumped.
The B18/B20 uses a chain (early) or belt (later). Chains stretch over time; belts wear and fray. Tensioners lose spring tension or hydraulic pressure.
Timing belt: replace every 10 years or 100,000 km, whichever comes first. It's a straightforward job, remove the radiator and front cover, align marks, fit new belt and tensioner, check tension with a gauge. Use OEM or Contitech belts. Timing chain: if rattling, check tension first (hydraulic tensioner may be stuck or weak). If chain is stretched, replace with a new chain, sprockets, and tensioner, the whole front cover comes off. While you're in there, do the water pump.
Radiator Core Leaks and Corrosion
Common Cooling System
Radiator Core Leaks and Corrosion
CommonCoolant dripping from the radiator core, overheating, low coolant level without obvious external leaks, white crusty deposits on the radiator.
Decades of heat cycling, poor coolant maintenance (tap water accelerates corrosion), road salt. The original brass cores rot through; plastic end tanks crack.
If the core is leaking, don't bother with stop-leak, it's a temporary bodge. Have it recored or replace it. OEM replacements are available; budget options exist but often use thinner cores. Flush the system thoroughly, replace hoses and clamps, refill with a 50/50 mix of quality glycol coolant and distilled water. Bleed air from the heater circuit and top of the radiator.
Thermostat Stuck Open or Closed
Critical Cooling System
Thermostat Stuck Open or Closed
CriticalStuck open: engine never reaches normal operating temperature (gauge sits low), poor heater output, high fuel consumption. Stuck closed: rapid overheating, gauge in the red, coolant boiling over.
Corrosion or mineral buildup in the thermostat housing. Old thermostats lose calibration or seize.
Test the thermostat by boiling it in a pan of water and checking opening temperature with a thermometer (should open around 82°C). If suspect, replace it, they're cheap. Use OEM or quality aftermarket (Wahler, Behr). Always fit a new gasket or O-ring, and bleed the system afterward.
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Common questions.
What should I budget for a decent 142/144/145?
For a usable driver, you're looking at anywhere from $3,000 to $8,000 depending on condition and location. A rust-free example with sorted mechanicals sits around $5,000-7,000.
How reliable are these as daily drivers?
Very reliable if maintained, but they're 50-year-old cars, set your expectations accordingly. The B20 engine is bulletproof and good for 250,000+ miles.
What's the best model year to buy?
**1971-1973 models are the pick.** By MY1971, Volvo extended the wheelbase 2cm, fitted the stronger B20D/B20E engines, and introduced proper equipment levels (L/DL/GL).
What are the common rust spots?
Rust is the 140's Achilles heel. Check these areas thoroughly or walk away: **Front end:** - Area around headlights and indicators, the wings rot from inside out - Inner front wings and wheel arches - Radiator support crossmember - Battery box - Lower grille area between bumper and body **Sills and doors:** - Sills are three-piece construction, if one's rusty, assume all three are compromised - Undersides of doors (water sits inside if drain holes blocked) - Body above the sills, especially at rear wheelarches **Underneath:** - Floor panels (front worse than rear) - Jack points/outriggers - Front crossmember - Steering box mounts - Chassis legs **Rear:** - Spare wheel well (the worst spot, check thoroughly) - Area between tail lights - Lower rear panel - Boot floor - On 145 Estates: tailgate bottom edge and rear side window surrounds **Windscreen/rear window:** - Rust around glass caused by failed rubbers or corroded chrome trim clips - Check for white "fog" inside the glass, means moisture and rust If you see surface rust, assume it's worse underneath.
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