Lancia Dedra 835

Turbodiesel with distributor injection pump and 90 hp. Simple, robust technology without common rail. Injection pump and turbo are the main wear items, but overall long-lived.

• !! Timing belt — interference engine from 80,000 km

  The 1.4 12V is an interference engine: a snapped timing belt causes valve contact and engine damage. Change interval every 60,000 km or 4 years. Many used vehicles have exceeded this service.

  Symptoms: No warning before failure; then immediate engine shutdown, no restart possible.
  250–600 $
  Ad timing belt kit FIRE 1.4 840A2000timing belt kit Lancia Y 1.4
• !! Distributor injection pump worn from 150,000 km

  The Bosch distributor injection pump loses delivery precision with age. Starting problems and power loss are the result. Reconditioning by a Bosch service centre is cheaper than a new part, but requires a specialist workshop.

  Symptoms: Difficult cold starting especially in winter, rough running, black smoke on acceleration.
  500–1,500 $
  Ad injection pump 835A4000 1.9 TDSBosch VE- pump Lancia Dedra 1.9 Diesel
• !! Turbocharger — shaft seal leaking from 120,000 km

  The turbocharger of the 1.9 TDS loses oil through the shaft seal at high mileage. Oil enters the intake tract and is burnt off. Short-trip operation without a turbo cool-down phase accelerates wear.

  Symptoms: Blue smoke on acceleration, rising oil consumption, oil film in the charge air hose.
  300–1,000 $
  Ad turbocharger 835A4000 1.9 TDSTurbo gasket Lancia Dedra 1.9 Diesel

Simple 1.6-litre injected unit with 75 hp. Base engine of the Dedra, robust but low on power. Timing belt every 60,000 km, otherwise straightforward.

• !! Timing belt change every 80,000 km from 60,000 km

  The 16V engine is an interference engine with a shorter change interval than comparable units. Engine removal is not strictly necessary for a timing belt change, but the twin camshafts require precise valve timing alignment.

  Symptoms: No warning before failure; immediate engine shutdown and severe valve damage.
  200–500 $
  Ad timing belt kit 183A1000 1.8 16Vtiming belt Lancia Dedra 1.8 GT
• ! Ground cable corroded — ignition issues from 80,000 km

  The battery ground cables on the chassis oxidise and cause sporadic misfires, starting difficulties and error messages. Cleaning and re-securing the earth connections usually fixes the problem immediately.

  Symptoms: Sporadic starting problems, occasional misfires, instrument lighting flickers.
  30–200 $
  Ad Massekabel Lancia Dedra 835batteryleitung Dedra 1.6 ie
• ! Thermostat faulty — engine does not warm up from 100,000 km

  The thermostat sticks in the open position, and the engine reaches operating temperature only slowly or not at all. Particularly noticeable in winter due to poor cabin heating. Cheap part, but the change requires draining the coolant.

  Symptoms: Temperature needle stays low, heating does not get warm, increased consumption in short-trip driving.
  60–200 $
  Ad thermostat Lancia Dedra 1.6 iethermostat 835C1000

Revised 1.6-litre with 90 hp and electronic injection. Noticeably more power than the i.e., same basic technology. Watch the timing belt and ignition distributor.

• !! Timing belt — interference engine from 60,000 km

  The 1.9 TDS is an interference engine. Timing belt change every 80,000 km or 5 years. Always replace the water pump and tensioner at the same time. Clutch replacement requires removing the entire drivetrain.

  Symptoms: No warning before failure; immediate engine shutdown.
  200–500 $
  Ad timing belt kit 835A4000 1.9 TDStiming belt Lancia Dedra 1.9 Diesel
• ! Ignition distributor worn from 100,000 km

  The mechanical ignition distributor with cap and rotor wears out and causes misfires and power loss. Moisture inside the distributor housing worsens the problem in wet weather.

  Symptoms: Engine stutters in damp conditions, rough running especially in the cold, power drop under load.
  100–350 $
  Ad distributor Lancia Dedra 1.6Verteilerkappe 159B9000
• ! Ground cables and connectors corroded from 80,000 km

  Ground cables and connectors oxidise regularly at this vehicle age. The result is sporadic starting problems, misfires and error messages. Systematically cleaning and replacing all earth points is the best remedy.

  Symptoms: Sporadic starting difficulties, occasional stalling at idle, instrument panel failures.
  30–200 $
  Ad Massekabel Lancia Dedra 835Steckverbinder wiring loom Dedra

16-valve version with 131 hp — sportiest naturally aspirated engine in the Dedra. Rev-happy and refined, but hydraulic tappets and camshaft phaser can be prone to issues at high mileage.

• !! Timing belt every 60,000 km — interference engine from 80,000 km

  The 1.8 i.e. is an interference engine. A snapped timing belt means valve contact and engine damage. On vehicles of this age without a service record, the timing belt must be replaced before use.

  Symptoms: No warning before failure; immediate engine shutdown.
  300–700 $
  Ad timing belt kit 836A5000 1.8 ietiming belt Lancia Dedra 1.8
• ! Hydraulic tappets rattle on cold start from 120,000 km

  The hydraulic valve lifters lose oil pressure overnight and rattle on cold start. The cause is worn oil seals inside the lifter or excessively long oil change intervals. High-quality engine oil delays wear.

  Symptoms: Metallic ticking on cold start for 10–30 seconds, disappears after warm-up.
  200–600 $
  Ad hydraulic lifter 183A1000 1.8 16Vvalvestößel Lancia Dedra 1.8 GT
• ! Oil leak at camshaft seal from 100,000 km

  The camshaft seals and valve cover become leaky at high mileage. Oil seeps from the top of the engine and can drip onto the exhaust system. Usually a cheap secondary repair to do alongside a timing belt change.

  Symptoms: Oil film on the cylinder head, oil smell after driving, occasional blue smoke when oil drips onto the exhaust manifold.
  80–300 $
  Ad camshaftndichtring 183A1000Simmerring camshaft Dedra 1.8 16V

1.8-litre injection unit with 101 hp. Good compromise between power and consumption for the compact class. Replace timing belt and water pump regularly.

• !! Timing belt every 60,000 km — interference engine from 60,000 km

  The 1.6 i.e. is an interference engine with a short timing belt change interval. Used vehicles of this age often have no documented service history. On failure: valve contact and engine damage.

  Symptoms: No warning before failure; then immediate engine shutdown.
  250–550 $
  Ad timing belt kit 835C1000 1.6 ietiming belt Lancia Dedra 1.6
• ! Idle control valve gummed up from 80,000 km

  The idle control valve (ICV) of the 1.8 i.e. fouls with deposits from the intake tract. The engine stalls when coming to a stop or has a fluctuating idle. Cleaning often helps; otherwise replacement is needed.

  Symptoms: Engine stalls when stopping, idle speed hunts between 500 and 1,200 rpm, rough tickover.
  80–300 $
  Ad idle air control valve 836A5000Idle Control Valve Lancia Dedra 1.8
• i Valve cover gasket leaking from 100,000 km

  The valve cover gasket hardens and leaks. Oil escapes from the top of the cylinder head and can drip onto hot exhaust components, causing a burning smell. Simple repair, but frequently ignored.

  Symptoms: Oil smell in the engine bay, visible oil film on the cylinder head, occasional smoke development.
  40–180 $
  Ad valve cover gasket 836A5000valve cover gasket Lancia Dedra 1.8

Two-litre sixteen-valve with 139 hp. Powerful engine with good torque, also known from the Fiat Coupé. Check timing belt and camshaft phaser regularly.

• !! Timing belt — change interval 80,000 km from 80,000 km

  The 2.0 16V is an interference engine: timing belt failure means total valve train damage. Recommended interval 80,000 km or 5 years. Many vehicles were factory-specified at 120,000 km — that is too long.

  Symptoms: No warning before failure; immediate engine shutdown.
  300–700 $
  Ad timing belt kit 836A3000 2.0 16Vtiming belt Lancia Dedra 2.0
• ! Oil leak at camshaft and crankshaft seals from 100,000 km

  Typical age-related picture: oil leaks from the shaft seals of both the camshaft (top) and crankshaft (bottom, at the gearbox). Seals are cheap, but the labour for the crankshaft seal is considerable.

  Symptoms: Oil drops under the engine, oil film at the gearbox-engine interface, oil smell in the engine bay.
  80–350 $
  Ad Simmerring camshaft 836A3000crankshaftndichtring Lancia Dedra 2.0 16V
• ! Valve train rattles with incorrect clearance from 120,000 km

  The 2.0 16V rattles when valve clearance is out of spec — annoying but not dangerous. The cause is often neglected maintenance or worn shims. Correct valve clearance restores quiet running.

  Symptoms: Rattling from the valve train, louder when cold, quietens slightly after warm-up.
  100–400 $
  Ad valve shims 836A3000valvespiel einstellen Dedra 2.0 16V

All-wheel-drive version with 169 hp — rarest and most sought-after Dedra variant. Viscous AWD, turbocharger and complex engineering. Spare part availability extremely difficult; a collector's item.

• !! Connecting rod bearing failure under high load from 60,000 km

  The connecting rod bearing shells of the turbocharged two-litre engine wear out at 60,000 km and must be replaced preventively. On tuned vehicles the damage occurs earlier. Bearing failure can lead to crankshaft breakage and total engine loss.

  Symptoms: Knocking from the lower engine area, louder under load; in advanced stages a metallic impact.
  2,500–6,000 $
  Ad connecting rod bearing 835A8046 2.0 Turboconnecting rod bearingschalen Dedra Turbo
• !! Head gasket — exhaust smell in coolant from 100,000 km

  The cylinder head gasket of the turbo engine fails under high thermal load. Check by opening the expansion tank and sniffing for exhaust gases. Overheating caused by a faulty thermostat or water pump accelerates the damage.

  Symptoms: Exhaust smell in the coolant expansion tank, pressure build-up in the cooling system, white steam from the exhaust.
  500–1,500 $
  Ad cylinder head gasket 835A7046head gasket Delta HF Integrale
• !! Exhaust valves — thermal erosion on cylinder 4 from 80,000 km

  The standard exhaust manifold routing channels hot gases directly past the exhaust valves of the 4th cylinder into the turbo. Thermal overload erodes the valves. Solution: aftermarket tubular manifold (600–850 €).

  Symptoms: Compression loss on cylinder 4, slight power drop, rougher running at high revs.
  600–1,500 $
  Ad Fächerkrümmer Delta HF Integraleexhaust valvee 835A7046

Turbocharged two-litre with 162 hp, sporty top engine. Check turbocharger and intercooler at high mileage. Timing belt and turbo oil supply are critical.

• !! Connecting rod bearings — preventive change at 60,000 km from 60,000 km

  According to practical experience, the connecting rod bearing shells of the Integrale engine must be replaced at 60,000 km. Failure leads to crankshaft breakage. On collector vehicles with unknown history, an oil pressure test before purchase is mandatory.

  Symptoms: Dull knocking from the lower engine, louder at higher revs and load; oil pressure drops.
  2,000–5,000 $
  Ad connecting rod bearing 835A7046 Integraleconnecting rod bearingschalen Delta HF Integrale
• !! Timing belt — shortened intervals on the turbo from 70,000 km

  The manufacturer interval of 120,000 km is considered insufficient. Experienced mechanics recommend 70,000–80,000 km or 4 years. On the turbo engine, higher thermal loads accelerate belt wear.

  Symptoms: No warning before failure; immediate engine shutdown and severe valve damage.
  300–800 $
  Ad timing belt kit 835A8046 2.0 Turbotiming belt Dedra Integrale Turbo
• ! Oil loss at the cylinder head from 80,000 km

  The turbocharged five-cylinder shows typical oil leaks at the valve cover and cylinder head gasket. The problem worsens at higher mileage. Oil on the turbocharger can create a fire hazard.

  Symptoms: Oil film on the engine block and turbocharger housing, oil smell after hard driving, drips under the engine.
  100–400 $
  Ad valve cover gasket 835A8046cylinder head gasket Dedra 2.0 Turbo