Vacuum tree
Senior User
Joined: Mar 2002
Posts: 450
Likes: 0
From: Charter Oak, Iowa
Vacuum tree
Is there such a thing as a vacuum tree for my '89 5.0 EFI upper intake that has seven branches instead of mine which has six?? I want to move the pcv line to the vacuum tree instead of it's current location on the back of the upper plenum. I was also thinking I could tap a new vacuum nipple in too but not sure what the plenum looks like on the inside and I don't want to drill in the wrong place. Has anybody done this?
Thanks
Randy
Thanks
Randy
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Vacuum tree
What's the matter with the factory PCV location? Even if it broke off, that'd be the place to drill & tap for a pipe nipple. Running it to the vacuum tree wouldn't give enough flow & might oil up some of the other vacuum lines.
Elder User
Joined: Apr 2002
Posts: 541
Likes: 0
From: Victoria, Texas
Vacuum tree
I dont know if this is the poster's reason, but the stock location dumps all crankcase ventilation into the #8 cylinder. This is said to cause higher temps I believe in that cylinder, possibly burning a hole in the piston or burning the valve. I know I had a burned valve this past spring in that cylinder, and after much research came to the conclusion that the pcv was to blame. I still have not had time to move it, but i'm not even sure i will, it made it 160,000 mi. on the first set of heads, and I doubt i'll have the truck for another 160,000 or so.
