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Post by erictheviking666 on Oct 10, 2010 22:12:44 GMT -5
As the title states I just replaced my head and the new one is non-EGR. I haven't started it yet because I'm waiting on the bigger jets for the carb, (also did 72cc BBK) so I was wondering.... Since the little EGR tube on the front of the valve cover no longer bolts to the flange on the head, do I need to block that tube off? Will it suck air back through that tube and cause a negative pressure issue in the crankcase? Anybody ever do this before and just leave the tube unattached? I will eventually order a non-EGR valve cover, but this project has depleted all my cash for the time being so I can't order a new one yet.
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Post by D-cat on Oct 10, 2010 22:36:53 GMT -5
I have not done this (my bike has never had EGR), but having read how the EGR is supposed to be hooked up, you do want to plug/cap the disconnected tube(s) or you'll suffer a vacuum issue.
Don't confuse the EGR system with the valve cover vent; that still wants to be hooked up to the airbox intake, or a catch canister if you have replaced the airbox with high-flow.
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Post by indy50 on Oct 10, 2010 23:35:00 GMT -5
Eric... if your nw head looks like this then dont worry about blokin anything, you can remove the egr pipe etc & use the cover, just get a non egr cover when u can
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Post by erictheviking666 on Oct 11, 2010 0:58:07 GMT -5
Cool thanks, I'll try that.
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Post by scootercapecod on Oct 12, 2010 12:07:36 GMT -5
When I did the Hoca Performance head it was non EGR and the original was EGR. No trouble with it for almost 1000 clicks on the chinameter.
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Post by rapidjim on Oct 12, 2010 13:55:57 GMT -5
I replace egr heads with non egr heads with no issues. Just make sure you plug the vacuum source to the canister.
Jim
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Post by erictheviking666 on Oct 12, 2010 14:02:17 GMT -5
Fired it up today before work. I just cut the tube, pinched it off, and JB welded it, problem solved. Thanks!!
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