The Definitive S2 Spark Plug Thread

[Fat Audi 80]

There has been lots and lots written about the correct Spark Plug for the S2 engine.

Mainly the discussions are regarding the correct type and the tightening torque required.

The correct part number is: Bosch F5DP0R

Nothing else but Bosch F5DP0R spark plugs, anything else could cost less in terms of plugs and a lot in terms of engine repair!

There IS NO BETTER spark plug than the F5DP0R for a stock S2 engine, and even up to 400 BHP.

HTH,

Mihnea

The correct tightening torque is 30Nm as per the attached. It has been documented many many many times that you should check your plugs regularly with the suggested wisdom being at least every oil change or every six months.

Referencing threads:

http://www.s2forum.com/forum/showthread.php?t=3189&highlight=spark+plug+replacement

http://www.s2forum.com/forum/showthread.php?t=23409&highlight=spark+plug+torque

http://www.s2forum.com/forum/showthread.php?t=18859&highlight=spark+plug+torque

Camcover Gasket Replacement;

http://www.s2forum.com/forum/showthread.php?t=20197&highlight=spark+plug+replacement

HTH chaps...

(Please let me know if there are errors or omissions)

Cheers,

Steve.

[Greg_S]

I'd better check my plugs are tight again at the weekend after fitting them last week too

[MattS2]

Check those plugs!

I did mine the other day and was quite surprised
One thing I'd like to add is make sure the spark plug socket is very secure, it can take some time trying to get it out of the hole.

I also found it easier to remove the cover with the throttle damper removed.

Good one Steve

Matt.

[Rusty]

What's a throttle damper

I always use a dab of copper grease on the threads but be careful if you do as you can over-torque. Also, even if you're a dab hand with the spanners, be careful with torque wrenches and if it doesn't feel right or you feel it start to yield then I guess you're a bit off!

[MattS2]

What's a throttle damper

What's the bit that is on a triangulated bracket that felt like a damper?


Matt.

[Rusty]

Sorry should explain, mine's missing after a garage bodged a screw into one of the mounting holes and it snapped off. I tried to drill it out... nuff said really It just makes driving in traffic a faff IME.

[MattS2]

There's me thinking you were taking the p15s.

[Rusty]

Moi

Anyhoo, back to sparky plugs.

[Jamo]

Its a trait prone to only the Bosch spark plug in my experience. When i used to run the NGK plugs in my S2, i NEVER had one come loose. Since changin over to Bosch plugs (NGK's dont like the high boost), they work loose. The washer is the fault of the design. They are junk. A torque is all well and good, but if you change plugs every day, you learn to "feel" when a plug is tight

There are a few threads about

[GT500]

[steve1234]

Thanks for the heads up steve, you learn something everyday. all the best steve D.

[Audi_CQ]

Uses std F5DP0R in my 2.5 both daily use and on track days without a problem. 500+++ hp dep. on boost

[Heat Seeking Missile]

Good work Steve

Any idea where these magical plugs can be obtained from?

Mark

[S2central.net]

An Audi dealer, VAGparts, Bosch outlet, GSF, ECP, quattro corner ...

[M_GORDON]

Bravo!

My meca mount me ones Champion spark and in low vel. into the city, the car was a tractor JAJAJAJAJA. The rpms goes down and up everytime!

Rocco has one problem with the repro when the car pass from 1.1bar and his problem was the SPARK!
He have 2 spark with 2 electrodes, other 2 with 4 and only one the Bosch F5DP0R. When, he change all Sparks and the turbo runs to 1,7bar