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c612pro · 04-07-2013, 10:46 PM

Actually losing cam lobes does not necessarily affect the lash as the base circle is not really affected. The fact that there is no vacuum at low engine speed indicates possibly having a cam ground off spec, maybe lobe center off, if the vacuum gauge fluctuates wildly that shows a vacuum leak. At least a good look inside the oil filter and the engine should tell you if there is mechanical trouble.

04-07-2013, 10:46 PM	#9
c612pro Junior Member Join Date: Jan 2012 Location: surrey bc canada Posts: 2 Likes: 0 Liked 0 Times in 0 Posts	Re: 396/375 hp/motor issues Actually losing cam lobes does not necessarily affect the lash as the base circle is not really affected. The fact that there is no vacuum at low engine speed indicates possibly having a cam ground off spec, maybe lobe center off, if the vacuum gauge fluctuates wildly that shows a vacuum leak. At least a good look inside the oil filter and the engine should tell you if there is mechanical trouble.