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Jitse · 10-15-2017

Please check your plenum also for straightness, there can be some problems because of this.
The plenum is cut open , and after it they welded , if they not supported it on a stiff metal plates with the bolt holes tighten to it , it can be that the plenum is bend if this is not done proper.
I had the same issue with my Siamesed plenum, using Jerry’s thicker gaskets, and a bit more torque about 30Nm solved my vacuum leaks.
How did your plenum looks from the inside, did they smoothed it after welding...

10-15-2017	#9
Jitse Join Date: Aug 2013 Location: Holland Posts: 80	Re: Siamese Intake Sealing Woes Please check your plenum also for straightness, there can be some problems because of this. The plenum is cut open , and after it they welded , if they not supported it on a stiff metal plates with the bolt holes tighten to it , it can be that the plenum is bend if this is not done proper. I had the same issue with my Siamesed plenum, using Jerry’s thicker gaskets, and a bit more torque about 30Nm solved my vacuum leaks. How did your plenum looks from the inside, did they smoothed it after welding...