142 / 144 / 145

1966-1974 / Sedan / Estate / Sweden

All 142 / 144 / 145 problems All workshop issues

Common Cooling System

Heater Core Blockage or Leaks

Symptoms

No heat from the vents, sweet smell of coolant in the cabin, wet carpets, fogged windows, low coolant level.

Cause

Corrosion and sediment buildup block the tiny heater core passages. Old cores develop pinhole leaks and drip onto the passenger footwell.

Fix

Back-flush the heater core by disconnecting the hoses at the firewall and running water through in reverse.

If blocked solid, it's heater core replacement time, the dashboard comes apart on most 140s, which is a full-day job.

Fit a new core, replace the hoses, flush the system, and use proper coolant.

Some fit an inline filter to prevent future blockages.

Know something we don't?

Owned a Volvo 142 / 144 / 145? Share your experience with this issue. What worked, what didn't, costs, tips. Help the community.

Submit an update

// More 142 / 144 / 145 problems

Other known issues

Common Cooling System

Radiator Core Leaks and Corrosion

Coolant dripping from the radiator core, overheating, low coolant level without obvious external leaks, white crusty deposits on the radiator.

Critical Cooling System

Thermostat Stuck Open or Closed

Stuck 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.

Common Engine

Oil Leaks from Front and Rear Crankshaft Seals

Persistent 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.

Common Engine

Worn Valve Guides and Oil Consumption

Blue smoke on startup or deceleration, fouled spark plugs, rising oil consumption between changes (more than half a litre per 1,000 km).

Common Engine

Carburettor Issues (SU or Zenith-Stromberg)

Rough idle, hesitation, stalling when cold, flat spots under acceleration, poor fuel economy, black exhaust smoke.

Critical Engine

Worn Timing Chain or Belt Tensioner

Rattling 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.

View all 21 142 / 144 / 145 problems