BMW M62B44-S2 Engine (1996-2001) – Specs, Problems & Compatibility Database

The M62 B44 is mechanically robust with good longevity when properly maintained. Early models (1996-1998) are prone to intake manifold runner actuator failure, but post-1998 revisions resolved this with improved diaphragm materials. Regular coolant changes (every 2 years), use of correct BMW Longlife-98 oil, and attention to vacuum hoses ensure long-term reliability. The strong V8 architecture supports high mileage with minimal wear when serviced correctly.

Primary issues include IMRA failure (especially pre-1998), VANOS solenoid faults, coolant leaks from the expansion tank, and oil leaks from the valve cover and rear main seal. These are well-documented in BMW service bulletins and stem from material aging, thermal stress, and maintenance neglect. The 1998 actuator update significantly improved system durability.

The M62 B44 was used in the E38 7 Series (740i, 740iL) and E31 8 Series (840Ci). It was BMW's flagship naturally aspirated V8 during this era, offering strong torque for luxury coupes and sedans. No licensed applications outside BMW. The engine was succeeded by the M62TU and later S62 performance variant.

Yes, though naturally aspirated. Bolt-on modifications like performance intake, exhaust, and chip tuning can yield modest gains (10-15%). Aggressive camshafts and porting are possible for higher output. The engine's strong bottom end supports moderate increases, but gains are limited without forced induction. Enthusiasts often pair ECU tuning with free-flow exhausts for improved throttle response and mid-range torque.

In combined driving, expect 15.0–17.5 L/100km (19–16 mpg UK). Highway cruising can achieve ~12.0 L/100km (~24 mpg UK), while city driving may exceed 20.0 L/100km (14 mpg UK). Real-world figures depend on driving style and vehicle weight, with E31 models generally less efficient than E38. The V8's smoothness comes at the cost of higher fuel consumption compared to inline-six engines.

Yes. The M62 B44 is an interference engine. If the timing chain fails or skips, pistons will contact open valves, causing catastrophic internal damage. While the double-row roller chain is durable, any signs of wear or noise should be investigated immediately to prevent engine seizure. Regular oil changes help maintain chain tensioner function and lubrication.

BMW specifies SAE 10W-40 oil meeting BMW Longlife-98 standard. Use a high-quality synthetic or semi-synthetic designed for petrol engines. Change oil every 15,000 km or 2 years to protect the VANOS system and timing chain. Proper lubrication is essential for long-term reliability, especially under sustained load or high-temperature operation.