Question about 1990 Volvo 740
The oil trap is on my ' 90 volvo 740T.
Can it be flushed with an (engine flush) cleaner or does it have to be removed and replaced with a new one?
Thank you very much for answering my previous question.
I would replace the flame trap, it costs about 5 bucks, and you would have to remove it to clean it anyway. Takes about 10 minutes.
Posted on Nov 04, 2008
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Posted on Jan 02, 2017
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The blowby vapors that end up in an engine's crankcase contain moisture as well as combustion byproducts and unburned fuel vapors. The crankcase is sealed to prevent the escape of these gases into the atmosphere, but the vapors must be removed to prevent oil contamination that leads to sludge formation. The positive crankcase ventilation (PCV) system siphons these vapors from the crankcase and routes them into the intake manifold so they can be reburned in the engine.
The main component in the PCV system is the PCV valve, which is usually located in the valve cover. A hose connects the PCV valve to the intake manifold. A second hose between the air cleaner and crankcase or other valve cover (V6 or V8 applications) provides fresh air to help flush the vapors out of the crankcase. Some engines have a separate air filter for the PCV breather hose located inside the air cleaner.
Probably not read above for details.
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