Question about 2000 BMW 3 Series

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Bmw 3 series when engine warm noise from rear of engine

Sounds like awhistle remove dipstick and noise goes lots of pressure from dipstick when removed

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Try replacing the pcv (positive crancase ventilation) its a 5 dollar part at most auto part stores might be a little more since its a german car

Posted on May 13, 2009

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Please help

possible coolant blockage in engine. Fan does not run because temp sensor is located is part of coolant that is not getting hot. Describe loud noise please. You are likely facing terminal engine failure, however, try back-flushing coolant passages on engine. This may be tricky, but you could remove thermostat and try running engine, or fabricate a rubber stopper on the end of a garden hose to put in hole where thermostat goes, remove lower radiator hose and flush water as hard as possible. A big rust flake could be blocking coolant flow. PS: have you recently had any work done on cooling system? I have seen some stupids use so much sealant when replacing a water pump that excess blocks coolant flow. Lots of luck. "The rusty one"

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