Aug 31, 2021 · BMW S65 Positive Crankcase Ventilation Valve. Like most other cars from the period, the S65 equipped BMW M3 used a Positive Crankcase Ventilation (PCV) system. What it essentially does is take unburnt fuel (blow-by gas) and reintroduce it into the combustion chamber, so it’s fully burnt.

Jul 8, 2018 · It not a conventional pcv valve system on the s65: it's a baffle type system in the valve cover that separate the oil vapors and oil droplets.

Feb 2, 2020 · PCV issues are also common to a wide range of BMW engines and are not specific in any way to the S65 engine. The primary job of the PCV is to alleviate pressure inside of the engine’s crankcase and reroute excess crankcase gasses back to the intake manifold be be burnt off in the combustion chamber.

A functioning crankcase pressure venting system, or PCV, is critical to preventing blowby and catastrophe. Repair or upgrade your PCV system with our catalog of OEM PCV components and aftermarket PCV upgrades.

Jun 3, 2024 · To answer your original question, The S65 (same as most modern engines built in the last 40 years) operate best with a sealed crankcase under vacuum. You can google the topic to read about the many reasons why, ranging from improved piston ring seal, to reduced fuel dilution in the oil, oil leak mitigation, and reduced oil consumption and ...

Aug 7, 2018 · I can had some info on your question about the pcv system. The s65 internal "pressure" is breathing freely through the two oil separtors on the valve covers. Oil vapors go through the intake and back through the 8 throttles.

This Genuine BMW Positive Crankcase Ventilation (PCV) Valve (Mfg#11617836553) fits BMW E60 M5, BMW E63 M6, BMW E64 M6, BMW E90 M3, BMW E92 M3, BMW E93 M3. Clear codes & keep your emissions system working properly

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Integrated Dipstick: Knurled and black anodized oil dipstick simplifies oil volume inspection. Reservoir: Available in 6oz or 8oz capacity with a 1/4" NPT drain plug fitting. Serviceable: Easily removable baffle plates and drain plug for cleaning.

Apr 4, 2023 · This engine is using a PCV system that captures fumes in the crankcase and redirects them to the intake. This system redirects oil and carbon particles into the intake to burn. So, by doing this, you lose some of the oil in the process.