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Ah, the elusive rear bank plugs.
I'm a turbo model, if your an NA it'll be a little easier as you have less vacuum lines to deal with.
If it's your first time, you better budget 45 minutes to pull the plenum, and 30 minutes to put it back on.
You will need two(maybe one) gaskets. One is the upper to lower plenum gasket.(NEED this gasket) the other is the throttle body to plenum gasket. Also get some white out, or similar marking stuff that comes off.
If your have a turbo model you need to pop the rear turbo intercooler line off. bolt on the turbo, plenum, and then a hose clamp. (12 mm bolts, not sure on the hose clamp)
next mark the throttle cable that goes to the back of the plenum with the white out to get it in the same spot when you put it back together. then there are two small bolts there. (10 mm I think?)
next get the two small bolts holding some electrical stuff onto the passengers side of the plenum. should be the same size as the throttle body bolts.
Next, there is a small tube for the EGR equipment that flows into the rear manifold (at least on the turbo there is) four bolts, two into the plenum, two into the "pre cat" I believe they are 12 mm
Next, there are three mounting points for the plenum right by the firewall. I believe still 12 mm. one on the driver's side, one on the passengers side, and one right under the throttle body.
Next you might as well start on the vacuum lines, 'cause some of them are a pain to pull off. This is where I like to get a little tricky though. My car has a large rubber hose going to the drivers side of the plenum to the drivers side of the car. I forget what it's for. that has a "pinch type" hose clamp. get that line off. now there is one going to the back of the plenum. pull that one. next there is one going to the passengers side of the plenum, by the electrical stuff with the two small 10mm bolts. (at least on the turbo. I believe that it goes to the blow off valve, so the NA's may not have that.)
Next, instead of pulling the rest of the vacuum lines, and running the chance of hooking it all up wrong, I pull the (4) 12mm(maybe 10mm, but I think there 12s.) bolts going through the throttle body to the plenum. note, this requires removing the y-pipe, (turbo) or the intake pipe (NA) to the throttle body.
Ok, now that the throttle body is dangling there, go two the two small 10 mm bolts holding the injector wiring on the front of the pelum. next is the three 12 mm bolts going inbetween the runners half way up the plenum. then there are two 12 mm nuts on the side of the plenum where it feeds into the engine. There are also a few (don't remember how many, maybe 4?) bolts on the front of the plenum.
Now, the plenum should be free, except for the vacuum lines, but you should be able to pick it up and spin it off to the side, and get at the rear spark plugs. BUT before you do, COVER THE HOLES for the lower plenum. DO IT. It's way less hassle than digging a washer out, or starting the car and not knowing there is a bolt in there, and fraggin your engine.
hopefully you've been storing your bolts and nuts in order, this will make reassembly easier.
If I forgot anything I appologize, but that's what I seem to remember, and I can't go out an pop the hood to refresh my memory at the moment. If I did forget anything, please post up.
Note: if you pull all the vacuum lines you don't need the throttle body gasket.
Note: on the turbo model, if you re-use gaskets that are more than a month or two old, congradulations, you now have a boost leak.
Note: on the turbos, I generally prefer copper NGK spark plugs. the platinum and iridium ones seem to get spark blow out at around 13~14 psi and above. This also means changing them more often.
That's about all I can remember at the moment.
Hope that helps.
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Repair, HELP WITH REPAIR
Jul 6 2005, 11:47 PM
