Which Copper Plugs

ferocity02 · Post by **ferocity02** » 13 Jan 2020, 18:01

Which exact (PN# please) copper plugs are recommend for a turbo 1998 S70? I see everyone recommending OEM plugs or copper plugs, but I haven't see anyone call out a specific part number for the copper plugs.

Post by **abscate** » 13 Jan 2020, 18:52

Every outlet uses different part numbers but I would go to anyone of our supporting vendors and use Their parts finder to source a set of either Volvo or Bosch single electrode spark plugs ( turbo) for your model and year

They will cost about $3 each from Bosch

This is a set of 5 OE Bosch FR7DPP (30637308) Spark Plugs, made in the same factory as Volvo 8692071

ferocity02 · Post by **ferocity02** » 14 Jan 2020, 13:06

Spark plug mfg's tend to have multiple plugs that are compatible with any one vehicle. And sometimes the best plugs for the vehicle are not what's recommended by the mfg.

I am looking for the PN for the copper plugs that are commonly recommended on these and other Volvo forums. I believe that Bosch is the preferred mfg of copper plugs for our cars.

Post by **erikv11** » 14 Jan 2020, 20:03

Bosch copper FR7DC
Bosch platinum FR7DPP

ferocity02 · Post by **ferocity02** » 14 Jan 2020, 23:53

Thanks! I just ordered a set of the FR7DPP plugs. These also can be found with Bosch PN 7955.

Post by **misha** » 15 Jan 2020, 01:06

erikv11 wrote: 14 Jan 2020, 20:03 Bosch copper FR7DC
Bosch platinum FR7DPP

Do they need to be re-gapped?
I know that Volvo ones in a set of 5 are properly gapped.

Cookeh · Post by **Cookeh** » 15 Jan 2020, 03:38

misha wrote: 15 Jan 2020, 01:06
erikv11 wrote: 14 Jan 2020, 20:03 Bosch copper FR7DC
Bosch platinum FR7DPP
Do they need to be re-gapped?
I know that Volvo ones in a set of 5 are properly gapped.

The FR7DPPs I bought were gapped correctly, as were three friends sets. The Volvo ones I bought were not (and had two broken plugs in the packet, so might be down to handling).

Post by **850 LPT** » 15 Jan 2020, 06:00

Agreed, I think re gapping is a thing of the past. Unless the packaging is damaged and one might suspect bent prongs.

Post by **abscate** » 15 Jan 2020, 07:59

I think they come at 0.75mm ().030" for Yemen) and people do report they run better at 0.70mm

On my turbo car, I gap new plugs at 0.70mm and run them 25k, then replace. I have found regapping needed at 15000 miles

Cookeh · Post by **Cookeh** » 15 Jan 2020, 08:01

abscate wrote: 15 Jan 2020, 07:59 I think they come at 0.75mm ().030" for Yemen) and people do report they run better at 0.70mm

On my turbo car, I gap new plugs at 0.70mm and run them 25k, then replace. I have found regapping needed at 15000 miles

The three sets I can account for were gapped to 0.7mm, if we're talking about the FR7DPPs. Of course that is a tiny sample size.