Plug access 85 928s

[PC-85-928S]

How do you access the plugs on an 85 928s 32v?
It seems impossible to access them.
Is the tool in the hatch the only way to go?

[Fredfox]

It is not really that hard, the tool makes it easier.
Take off the two side air boxes.

[Mrmerlin]

first remove the cross brace then remove the 2 air tubes and the top portion of the aircleaner, then remove the side portions of the intake manifolds about 5 clamps a side.
Then get the tool for sparkplugs from the tool set , use care when pulling the sparkplug wires out so you dont snap off the connectors

[Landseer]

If the motor mounts are collapsed ( which they will be unless you or somebody else recently replaced them), its more difficult. Still doable with the tool noted, but a pain.

What works for me is a 1/2 drive ratchet, stepped down to 1/4, followed by one of a set of 1/4" drive extensions in various lengths, followed by a 1/4 to 3/8 step up, follwed by a 3/8 drive 13/16 sparkplug socket. The sparkplug socket has a 3/4" hex end, so it can alternately also be driven by a set of extensions ending in a 3/8 drive 3/4 socket. Usually I need to take the rubber insert out of the sparkplug socket to get a little extra bending to avoid the fender if the motor mounts are collapsed.

Once loose, I sometimes use a 1/4 drive air ratchet to wind them out.

The tool in the trunk has a spring so it has some flexibility. But its a little hard to drive it.

A magnet on an extension rod helps drag the plugs out of the tubes.

Putting plugs back in is pretty easy, drop them down the tubes and use the extensions with no ratchet to wind them in a few truns. They almost always self-center in the holes and start cleanly. A few rotations by hand ensures they aren't cross threaded.



The very first thing I do, though, is vacuum. Pull the wires. Tape some sort of hose onto the end of a shop vac. Suck everything out of the tubes before taking out the plugs. And do it again after the plugs are out. Gotta keep grit out. Sometimes the tubes are filled with oil, too. Suck it out before removing the plugs so it doesn't wash grit into the cylinders.

[porken]

The plenums are cast with indents to fit a spark plug tool (EG. cyl #3), but I can't imagine trying to replace all the plugs with the plenums on.

I use a 3/8" stubby driver, a 10" extension, and a spark plug socket with a built in universal drive.

[PC-85-928S]

this may sound like a stupid question, but here goes.
When you guys refer to removing the plenums or the side intake manifolds, (I assume they are the same thing), how do they come off?
Aren't they attached to the engine block?
Do you remove the 5 clamps on the upper rubber sleeves?
Are they attached from underneath?

[Danglerb]

Look around in case there is some kind of bolt or something, but pretty sure off come the hose things and off come the side things. Maybe just loosen the clamps on one side, and you might want to run a hose pick under the edge of the rubber to break it loose.