Hmm Ok well that in theory replicates the factory I guess, my only other thoughts are what size is all the pipe work compared to the factory ?
It could be that your pipe work is restricting air flow causing the pressure build up. Also how often to you check and empty the can itself? It could be that there’s quite a bit of oil in there and so it can’t ‘catch’ any more so it just spits it back out?
Generally the only way an engine smokes is if there is oil getting into the combustion chamber, you’ve eliminated rings and valve stem oil seals by fitting your factory cover set up, and that’s pin pointed your custom set up. I think it’s worth trying to compare every little detail that the factory set up has compared to custom and seeing what the difference is. Is there a restriction anywhere that’s causing a higher pressure build up?
Maybe the custom cover has a valve in it that’s blocked or partially blocked? Or is there something from the factory set up that you can in cooperate to the custom set up that will stop or reduce the oil flow?
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All the lines are 10an lines. They’re as large if not larger than the factory setup. The can is only about 2-3 weeks old. Possibly could have some sludge in there, worth checking since it’s been colder and wet and that’s when they tend to fill up the quickest. The custom valve cover is simple in nature. There’s nothing to get blocked or restricted. If you check out Integrated Engineering’s site or search the image you’ll understand why I say that. I’ve already put a new oil drain line from the turbo so that’s ruled out as well. Definitely no restrictions anywhere.
It’s something I have to live with for now until work out if or how to tap into the vacuum pump without effecting my brakes since it also runs off that pump.
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