Plenum Installation Question
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 411
From: WV
On my 89 when I loosen the top runner to plenum bolts the runners expand out enough for me to just slide the plenum out. To put it back in I just slide it back in and tighten it back up. I don't know if all the runners out there open up enough to do this. but Im sure glad mine do...
..If yours is so tight you can't do this, the only thing you can do is loosen up one side of the runners at the bottom...WW
..If yours is so tight you can't do this, the only thing you can do is loosen up one side of the runners at the bottom...WW
Burning Brakes
Joined: Oct 2004
Posts: 898
Likes: 1
From: Pearland Texas
Well, if I remember correctly there are a couple of torx head bolts that are only accessible from the backside. That means they are blocked by other engine components. Once the upper bolts are removed I just tapped on it with a rubber mallet and it pulled up. 
Plus make sure all the hoses and tubes are disconnected.
Plus make sure all the hoses and tubes are disconnected.
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
on my 87, I tightened the bottom up, inside and out, and when I slid the plenum in there was enough room to get it and the gaskets in with out issues. something you might try is to use a large flat tip screwdriver and gently slide it in , there's some give
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 411
From: WV
I didn't think mine was the only one that would work this way and allow me to just slide the plenum into place without loosening the runners.I see there are quite a few others. If you look at the plenum you will see it is cut at an angle (like a wedge) instead of straight up and down, to allow you to slide the plenum in..Just don't use any type of adhesive on the gaskets or you can't get them in without them sticking and screwing up...
..WW
..WW
Last edited by WW7; Mar 11, 2011 at 07:20 AM.
