The M52TU, M54, and M56 benefitted a lot from aluminum engine blocks, but all can suffer from dreaded pulled head bolt threads. Here's how to fix that issue forever.

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The N55's oiling system is one job away from near perfection. Find out how you can take M4 parts and improve your 335i or 435i engine right here!

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BMW's N55 and S55 engines are modern marvels, but their advanced Valvetronic system can also be their downfall. Find out how to fix their issues here!

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The BMW N5X engines are generally great but have a few fatal flaws. Their camshaft bearing ledges wear out as they age, leading to very costly repairs.

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BMW loves making mid-year changes, and this might be the trickiest one. If you end up with an early N52, follow this guide to convert your old-style coils.

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Video Editor Stephen had a power loss in his Spec E46 race car in 2022. With 25,000 race miles on the odometer, a leak-down test highlighted the problem.

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Compression testing is one of the most common procedures for checking the relative health of an engine. If you ever want to know where you stand in terms of the overall health of your engine, a

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Determining BMW's EU5 & EU6 direct fuel injectors takes a special process. Follow this guide to identify what injectors you'll need for your replacement.

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