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Repair and Replacement of BMW Engines

Repairing a BMW Engine: Factors to Consider

The repair of a BMW engine depends on the extent of damage it has incurred. The decision to proceed with repairs should only be made after a thorough diagnostic process, which includes computer diagnostics, compression testing, oil pressure measurement, as well as checking the settings and synchronization status.

If the engine is immobilized due to chain breakage or synchronization issues, it is usually more feasible to visually inspect the damages post dismantling the valve cover and oil pan. In such cases, repair is often not cost-effective, leading to engine replacement with a functional one.

Instances Where BMW Engine Repair is Feasible

In scenarios involving damage to the cylinder head or head gasket, confirmed by the presence of exhaust gases in the cooling system, the gasket is replaced along with a set of fastening bolts after positioning the head preliminarily and verifying its seal.

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A common issue, especially in 1.8-liter petrol engines, is the lack of seal in valve seals, which can be replaced (depending on the car model) without dismantling the cylinder head.

Engine replacement is advised in cases of severe damage, requiring cylinder block dismantling, piston ring or piston replacement, crankshaft replacement, and bearing inserts. The traditional «engine repair,» sometimes referred to as «overhaul,» is gradually becoming obsolete.

The production technology of modern engines and, primarily, the pricing policy of engine parts manufacturers dictate that potential BMW engine repairs are significantly more expensive than replacing a complete engine assembly.

Replacing the engine with a used or new one is cheaper in various issues. For example, if piston rings or cylinder liners need replacement, if honing blocks become unusable, or if crankshaft grinding or replacement is required.

Repair or Replacement Timeframes

The repair duration depends on the type of damage and the repair method used. The shortest time associated with complete engine replacement generally takes 2 working days (depending on the type and model of the vehicle). In the case of an exchange, the duration may extend to 3-5 days as the old engine needs dismantling, and the new one requires assembly.

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The longest BMW engine repair, related to block damage, usually takes several working days. The exact time and cost are always estimated prior to repair and depend on the vehicle model and engine type.

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Factors Affecting the Price of BMW Engine Repair and Replacement

The cost of engine repair or replacement includes: prices of parts, seals, subcontractor services (head planning, leak checking, possible scraping), cost of a used engine and its transportation for servicing, dismantling of components, and reinstalling the new engine.

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