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The Terminator
Engine/Tuning
Using Valve Cover Breathers
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<blockquote data-quote="MalcolmV8" data-source="post: 14099231" data-attributes="member: 8854"><p>Heads up for the OP. I've tried breathers on a variety of cars including my Cobra and the oily engine blow by smell is noticeable. Maybe I'm just picky but when you have to drive with the windows up because it's a little cool out and you can smell that oily blow by smell coming through the vents then its not for me. I removed the breathers and went right back to PCV setup that recirculates the blow by into the intake to get burnt.</p><p></p><p>As for the blow by needing to be pulled from the crank case or else it forms varnish and and has an acidic reaction with the oil. Well I've read up a lot on that and can't tell if it's BS or just for emissions or holds any merit. I can tell you my personal experience on my turbo'd honda I built which I ran for 2 years as a daily driver. It had no PCV system. Instead the block and valve cover are just vented to a catch can which initially just had a breather but the smell coming into the cab of the car was killing me. So I ran a hose from the catch can all the way under the car to the rear bumper by the tail pipe and put the breather filter over there. I would still smell it once in a while but not nearly as bad.</p><p>Anyways after 2 years of daily driving that car and running it hard in boost I found no traces of sludge build up or anything else bad going on when pulling the valve cover and oil pan for inspection. Maybe 2 years of DD is not enough but I'd think if nothing has formed yet then nothing will. FYI I used mobil 1 full syn and changed the oil every 5k miles.</p></blockquote><p></p>
[QUOTE="MalcolmV8, post: 14099231, member: 8854"] Heads up for the OP. I've tried breathers on a variety of cars including my Cobra and the oily engine blow by smell is noticeable. Maybe I'm just picky but when you have to drive with the windows up because it's a little cool out and you can smell that oily blow by smell coming through the vents then its not for me. I removed the breathers and went right back to PCV setup that recirculates the blow by into the intake to get burnt. As for the blow by needing to be pulled from the crank case or else it forms varnish and and has an acidic reaction with the oil. Well I've read up a lot on that and can't tell if it's BS or just for emissions or holds any merit. I can tell you my personal experience on my turbo'd honda I built which I ran for 2 years as a daily driver. It had no PCV system. Instead the block and valve cover are just vented to a catch can which initially just had a breather but the smell coming into the cab of the car was killing me. So I ran a hose from the catch can all the way under the car to the rear bumper by the tail pipe and put the breather filter over there. I would still smell it once in a while but not nearly as bad. Anyways after 2 years of daily driving that car and running it hard in boost I found no traces of sludge build up or anything else bad going on when pulling the valve cover and oil pan for inspection. Maybe 2 years of DD is not enough but I'd think if nothing has formed yet then nothing will. FYI I used mobil 1 full syn and changed the oil every 5k miles. [/QUOTE]
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