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BMW N42 Engine

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BMW N42 Engine For Sale

This engine was an in-line 4 cylinder available in 1.8 and 2 liter displacements. In this sense, this engine marks the return of the propeller house, after almost 25 years, of a 2-liter unit split into 4 cylinders. The latest was the 2-liter unit of the M10 family, fitted until 1977 on the BMW 320 and BMW 520.

This engine replaces the two M43 and M44 engines. The new engine is characterized by the presence of the new VANOS double variable valve timing system, which acts on both the intake and exhaust valves. In any case, the distribution was double camshaft in head driven by chain and 4 valves per cylinder. Still with regard to distribution, this engine introduces the Valvetronic system, which, working together with the double VANOS, ensures a continuous variation of the timing of the two camshafts according to the engine load. Power was adBosch DME ME9.2 electronic injection.

Best Engine Replacement Procedure
  1. Swap the engine’s oil, fuel and oil filters, and coolant.
  2. Install new engine and external coolers if existing.
  3. Cleanse the cooling system thoroughly, then replace the water pump.
  4. Renew necessary hoses and belts.
  5. Install a new timing belt, spark plugs, and wires.
  6. Replace essential gaskets and seals, focusing on the oil pan, front, and rear main seals.
  7. Clear the vehicle’s computer codes before engine installation.
  8. Ensure the replacement engine matches the original specifications.
  9. Transfer exhaust manifolds, mounts, distributor, and sensors from the old engine.
  10. Disable fuel and ignition before ignition to prime the oil.
  11. Ensure no plugs or tape remain on the engine before installation.
7 Common Mistakes to AVOID!
  1. Not resetting the vehicle’s computer codes before installation.
  2. Skipping the step of adding engine oil before the first startup.
  3. Forgetting to deactivate the fuel and ignition systems, essential for priming the oil.
  4. Ignoring the replacement of the oil cooler or the radiator’s integrated oil cooler.
  5. Overlooking the cleaning of the radiator and checking the operation of the cooling fans.
  6. Not swapping out the flywheel and its securing bolts.
  7. Trying to initiate the engine’s first run without proper priming.
Warranty Info
Review our Warranty, Return & Exchange policies before ordering. Standard Warranty: 30 days parts replacement. Extended Warranty: Optional 90 days. No labor costs covered. Defective parts may be replaced or refunded. Read more.