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On average, the cost for a BMW 735i Positive Crankcase Ventilation (PCV) Valve Replacement is $239 with $144 for parts and $95 for labor. Prices may vary depending on your location.
| Car | Service | Estimate | Shop/Dealer Price |
|---|---|---|---|
| 1988 BMW 735iL6-3.5L | Service typePositive Crankcase Ventilation (PCV) Valve Replacement | Estimate$402.91 | Shop/Dealer Price$492.39 - $721.46 |
| 1986 BMW 735iL6-3.5L | Service typePositive Crankcase Ventilation (PCV) Valve Replacement | Estimate$382.91 | Shop/Dealer Price$472.42 - $701.51 |
| 1987 BMW 735iL6-3.5L | Service typePositive Crankcase Ventilation (PCV) Valve Replacement | Estimate$382.91 | Shop/Dealer Price$472.42 - $701.51 |
| 1991 BMW 735iL6-3.5L | Service typePositive Crankcase Ventilation (PCV) Valve Replacement | Estimate$382.91 | Shop/Dealer Price$472.38 - $701.44 |
| 1990 BMW 735iL6-3.5L | Service typePositive Crankcase Ventilation (PCV) Valve Replacement | Estimate$382.91 | Shop/Dealer Price$472.45 - $701.56 |
| 1985 BMW 735iL6-3.5L | Service typePositive Crankcase Ventilation (PCV) Valve Replacement | Estimate$382.91 | Shop/Dealer Price$472.42 - $701.51 |
| 1989 BMW 735iL6-3.5L | Service typePositive Crankcase Ventilation (PCV) Valve Replacement | Estimate$387.91 | Shop/Dealer Price$477.18 - $706.09 |
| 1992 BMW 735iL6-3.5L | Service typePositive Crankcase Ventilation (PCV) Valve Replacement | Estimate$387.91 | Shop/Dealer Price$477.84 - $707.23 |
The PCV Valve transfers gasses from inside the crankcase to the intake manifold where they are burned as part of the normal combustion process. Excess fumes are burned by the engine, rather than released into the atmosphere.
PCV valve failure can be caused by other engine problems. To ensure that this is not the case, a mechanic should test your engine after replacing the PCV valve, to make sure that the car runs well and doesn’t have other issues.
In general, it is a good practice to replace the PCV valve during every major tune-up. Changing the engine oil and flushing the engine on a regular basis will prevent sludge build-up inside the oil pan that may cause the PCV valve to fail.
As excess gas accumulates in your crankcase, the PCV valve redirects it through the intake manifold, where they are used as a normal part of your engine’s process. When the PCV valve fails, your engine won’t redirect this excess gas that it depends on. As such your vehicle will not run smoothly, and it will likely get much worse gas mileage.
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