A8 / S8 (D2 Platform) Discussion Discussion forum for the D2 Audi A8 and S8 produced from 1994-2002

Spark plugs?

Old 09-16-2002, 04:59 PM
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Default Spark plugs?

Anyone knows where are the sparkplugs and how long it takes to replace them?
I think I know where to look for them ,but I need some directions before I do any work . All I want to do is check them if they were replaced or not by my frendly dealer.
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Old 09-16-2002, 07:07 PM
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Default Re: Sparkplugs .

They are under the plastic valve cover and each one has its own coil attached to the top of it. Remove the plastic covers (no need to remove the center cover over the intake manifold). Each ignition coil has two (I think) small bolts holding it in place. Remove the bolts and pull up on the coil- take care not to pull or damage the wires running to the coil (you may need to disconnect the wires from the coil at the coil). Once the coil is off, the spark plug is right there. Be sure to blow out (compressed air) any dirt and debris BEFORE removing the spark plug so that it doesn't drop into the cylinder. The torque specified for the plugs is 30 Nm, but remember- it's an aluminum block, so take it easy! My preference for plugs is Bosch Platinum Plus 4.
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Old 09-16-2002, 08:35 PM
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Default Re: Sparkplugs .

Skiracer Tanks for your help.By the way I have the
same year and color, but the wheels .Yours looks cool.Thanks again for info.
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Old 09-17-2002, 04:20 AM
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Default Look at the procedure for Valve Cover Replacement

Skiracer is exactly correct, if you look at the procedure for valve cover replacement, it covers most of this, and has a few pictures.<ul><li><a href="http://groups.yahoo.com/group/AudiA8repair/files/">More Info here on spark plugs</a></li></ul>
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Old 09-17-2002, 06:10 AM
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Default Re: Sparkplugs - Comments, and a question


As others have pointed out, it's very simple.
I just did this job last night.

The engine beauty covers are held on with two allen
bolts, I believe they are 5mm. On the passger side,
you need to remove the air intake. Loosen the hose
clamps where it connects to the air box, then when it
connects to the manifold. The pipe will come out, then
you can remove the plastic.

Don't drop the coil bolts, they will fall into the engine
tray and be hard to extract (don't ask me how I know).
I found it easier to disconnect the coil from the wire
than to pull on the wire. There is a silver colored
metal piece on the coil that prevents the plug from
coming off. Press that down, and the plug will come
off the coil. It's hard to describe, but once you see
it, you will understand.

You need a 5/8" spark plug socket to remove the plug.
Don't even try to do this with a standard socket, because
you won't be able to get the plug out of the well.

The new plugs get torqued to 20ft lbs. I would not try
to install new plugs without a torque wrench. You do not
want to strip a plug in the head!

One final note / comment / question: On my car, the
#8 (driver side, closest to the firewall) plug well was
full of oil. When I removed the coil, the rubber connector /
boot broke in half. I guess sitting in oil caused it to break
down. I sucked out the oil, and installed a new plug.
The car ran fine for a few minutes, but then it started
running on 7 cylinders. I assume I need a new boot
for that coil.

Also, I assume I need a new valve cover gasket as well,
right? The valve cover gasket should keep the oil from
getting into the plug well, right?

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Old 04-28-2019, 06:22 PM
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Default oil in spark plug well - valve cover gasket

Originally Posted by barryl View Post

The valve cover gasket should keep the oil from
getting into the plug well, right?
Yes; the spark plug well seals are separate pieces from the valve cover periphery gaskets, but come with the gaskets. I just put on a new set of valve cover gaskets and I could see that I screwed up 2 of the 8 seals that keep oil out of the well just by looking down into the wells. Simple matter to pull the valve cover and reposition the round seals. I ended up sticking the gaskets and seals to the valve covers with permatex so they wouldn't drop out of position as I maneuvered the covers back into place.
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Old 04-30-2019, 07:49 AM
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Um....you just answered a 17 year old post. Just sayin'
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Old 05-01-2019, 03:02 AM
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Right; meant to. That's the great thing about these forums - the info keeps, so others can search and find the info they need.
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Old 05-16-2019, 05:57 PM
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Default Iridium.. the only way to fly.

You cannot outrun technology.. pc
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Old 06-02-2019, 04:49 AM
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Posts: 19

Just think of the technology in 2002 compared to today! I actually laughed when I bought my A8 last year and found it had a car phone in the passenger armrest. It's like finding a payphone at the gas station. The kids have fun with it though.
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