spark plugs

[CJ_Boxster]

Ok i found the spark plug part numbers... Its Bosch Copper Sparkplug 7402. Order them at Napa, They probably wont have them instock but 4-6 bucks a plug is alot better than dealer price of 12 a plug. I have them and the torque curve is much smoother, Idle is better too.

[porsche986spyder]

Originally Posted by CJ_Boxster

Ok i found the spark plug part numbers... Its Bosch Copper Sparkplug 7402. Order them at Napa, They probably wont have them instock but 4-6 bucks a plug is alot better than dealer price of 12 a plug. I have them and the torque curve is much smoother, Idle is better too.

Thanks again!

[Adam]

Did a 2003 boxster S come with Bosch or Beru plugs? Also, I don't have nearly 60k miles on my car. It's around a 1/3rd of that but it's been almost 4 yrs. Could the plugs possibly weld themselves into the cylinder heads if I don't change them soon?
I Noticed Pelican is selling the colder plug 14 FGR 6 KQU for both the base and S models?? http://www.pelicanparts.com/catalog/shopcart/996M/POR_996M_BAStun_pg1.htm

It looks like they are selling the S guys the wrong plug?
Part Diagram Locations for: 99917020791
Model Main Diagram Description
Boxster 986 (1997-2004) Ignition System Spark plug, 14FGR 6KQU
996 (1999-2005) Ignition System Spark plug, 14FGR 6KQU

[Tool Pants]

The part numbers you listed is Beru for the plug used on the 2.7 and 3.2 986.

The 2.5 1997-1999 uses a different plug. The Beru part number is 14 FR 7 LDU.

So they are selling the 2.5 owners the wrong plug.

[Adam]

Jim posted this below
2.7L - Bosch FGR 6KQC
3.2L - Bosch FGR 7KQC
- Beru 14 FGR 6 KQU
- Beru 14 FGR 7 KQU

It looks like the 2.7L and the 3.2L use different plugs?

[Tool Pants]

No, that is part of the Bently shop manual errors. Page 03-30.

2.7 and 3.2 use the same heat range plug. 6. Bentley has a 7 listed for the 2.7. But for the 3.2 it has listed 6 and 7. The strange thing is for the 3.2 it shows the Beru plug with 2 different heat ranges - figure that one out.

[Adam]

I see that in my Bently. Thanks I think I know the answer to this, but is it a good idea to change the plugs every 4 years regardless of mileage?