:drive: For BMW DISA Valve Repair Kit Rebuild Rattle Aluminium Fix Overhaul M54 2. The M60, M62 and M62TUB V8 engines used in the E31 840i, E32, E38 and E39 all suffer from PCV valve failure when they reach a certain age. The engine idle sometimes hunts but not always. This valve changes the air movement in the intake manifold. Having known nothing about these I've done a bit of light reading. Answer: You don’t list the particular of the BMW in question so I will answer in general terms. at idle engine will feel rough, idle poorly and have a lack of power essentially this is caused by combustion gases escaping between the valve and valve seat when they are not sealing correctly new idle air control valve iac for bmw e30 e36 320i 325is e34 525i 13411433626 2 offers from $179 the fusebox in an e46 3-series is inside the glove box, Symptoms of fault: The symptoms of this fault are very obvious there is a rattling noise coming from the DISA valve, SES light is lit and getting a lean mixture fault or rough running at idle. If you disassemble a worn out DISA valve and look at the bell crank lever it’s common to not even recognize that it once had a hex shape on the protrusion. The Positive Crankcase Vent ( PCV ) sole purpose is to relieve the pressure that builds up inside your engine’s crankcase by sucking out the gases, oil and. repair bmw e60 vacuum pump oil leaks / reparat pompa vacuum.
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