Hot answers tagged pcv-valve
First: what you're suggesting is illegal if you live in a state where it's illegal to remove an emissions device. At a minimum, you're making your car non-street legal. That aside, you're creating pollution for no good reason. There's a zero percent chance that your catch can will be more effective than a modern catalytic converter, especially when ...
Whether or not it's right for your car, I can't say as I don't know anything about Audis. However, it's normal for there to be some (not a lot) oil in the intake of the cars I'm familiar with.
The pulsing should not be a huge issue. Remember that your 4-cyl engine will not have a constant vacuum associated with it as it is only drawing it twice per revolution of the crankshaft, which means you'll get vacuum pulses. Vehicles with more cylinders will have a more constant vacuum draw, but will still have vacuum pulses ... they'll just be less ...
The PCV system reduces pollution by collecting "blow-by" (unburned gasoline and oil vapor) that would otherwise be vented into the air we breathe. The PCV system routes blow-by back to the intake system so it can be burned properly. PCV is designed to handle these by-products correctly; it is not harmful to the engine. Placing a closed container on the end ...
I think everyone is missing the point of the catch can in the first place. The catch can sole purpose it to keep oil from going into your intake and being burn, which is BAD for the environment. You would put the catch can INLINE with the PVC return line to the Intake. When installed this way (the proper way), it is still recirculating the fumes, but ...
The Haynes manual is correct you need to remove the intake to access the PCV valve. The hose from the valve cover to the intake tube is a breather hose. The valve in question.
It certainly looks cracked. You could try spraying some EGR cleaner at the crack while the engine is idling. If the EGR cleaner gets sucked in through the cracked pipe, the revs of the engine will change, which will confirm you have an air leak.
I'm not sure that the valve you have pictured is the PCV valve. A PCV valve traditionally is a connection between the intake manifold and the crank case. The line pictured, from the crank case to the air filter, is most likely a fresh air intake or breather line. But i think your on the right track to look for the PCV valve. A poorly working PCV system can ...
For such a cheap part, if you suspect the vacuum hoses then just replace it to remove it from the list of possible causes. From my knowledge the MJ tritons were still carburettor. If this is the case then perhaps it might be worth trying to diagnose a possible carburettor issue. If it performs this behaviour at any particular throttle position then it might ...
What I see missing here is the fact that the PCV system does far more than just retain EPA compliance, the blow-by contains dozens of damaging compounds that must be removed as soon as they enter the crankcase by fresh air entering one bank, and the foul nasty vapors evacuated or "sucked" out the opposite bank while still in a gaseous state. If you do NOT ...
I think you need to give more information about the application to attract answers. For example, define "dissipate": do you mean to scrub off enough thermal energy to bring temps to within 2 degrees of ambient? 20? 200? Is the goal to use this intermittently or for constant use? Big difference in BTU's there. And is your goal to bring the shaft to 0 rpm ...
If the oil return passages are plugged, then at high rpm or after sustained operation you may be building up lots of oil in the head which is then finding it's way out into the airbox. Since you did have some parts come apart inside the top end, maybe some of the baffle ended up in the return passages and is preventing sufficient oil drainback.
Take Timo's advice. If it 'aint broke, don't fix it. If it's not a scheduled service item, don't mess with it unless you've actually got a problem.
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