The passenger side is a snap once you remove the heater panel. There is a way to do the drivers side without removing the booster or raising the engine. I've done it twice now, on a 90' and a 94'. It requires making a tool of sorts to work in the tight space to loosen/tighten the bolts. I bought a set (3) of these ratchet wrenches from Sears. You actually only need the one where bit goes to the outside on one of the angled ones.
I securely attached (rather crudely) a metal handle extension (from an old gasket scraper) to give me the leverage I needed.
I cut down the allen and torx bits so that they were as short as possible. This gives the max amount of working space.
So with this tool you can get in there to loosen/tighten the bolts. You must absolutely make sure you have proper alignment and purchase on the bolts (especially the OEM ones) to make sure you don't strip them. Clean out any dirt that might have gotten in there. I have found that firm constant pressure on them will loosen most. A sudden hard twist attempt will probably strip them. It's a craps shoot on the OEM bolts.
There's just enough room to loosen the bolts completely, but you wont be able to remove the bolts without removing the cover at the same time. In other words you remove the cover (and replace it) with the bolts in place. It takes a little wriggling to get it out (and in) but they do come out. Just be careful not to scratch the cam lobes or cam bearing surfaces with the bolts while installing or removing.
As for tightening, the is no way to get a torque wrench in there. I use an angle torque and "feel" method based on the how many degrees the others must be turned with a torque wrench once you get them snug. Just pay attention to the regular ones when you torque them. Then turn the back ones by the same amount of degrees with your tool. You'll be able to feel if your close, at least I can.
If your a purist your probably aghast by now but this does work.
Good luck and don't be surprised if you strip an OEM bolt when you try to remove them. It will one that you think will be no sweat, ask me how I know.
H
