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Which Copper Plugs

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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erikv11
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Re: Which Copper Plugs

Post by erikv11 »

ferocity02 wrote: Tue Jan 14, 2020 11:53 pm Thanks! I just ordered a set of the FR7DPP plugs. These also can be found with Bosch PN 7955.
Oops - not true, Bosch 7955 is the FR7DC.

The FR7DPP is sold only as FR7DPP, AFAIK. I don't think there is a cross-reference to the older part numbering system like 7955.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'99 Camry V6 :shock: 130k
gone: '96 NA 850 210k, '98 NA V70 182k
ferocity02
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Re: Which Copper Plugs

Post by ferocity02 »

erikv11 wrote: Wed Jan 15, 2020 2:08 pm
ferocity02 wrote: Tue Jan 14, 2020 11:53 pm Thanks! I just ordered a set of the FR7DPP plugs. These also can be found with Bosch PN 7955.
Oops - not true, Bosch 7955 is the FR7DC.

The FR7DPP is sold only as FR7DPP, AFAIK. I don't think there is a cross-reference to the older part numbering system like 7955.
Oops I think you're right.
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RickHaleParker
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Re: Which Copper Plugs

Post by RickHaleParker »

The time it takes to check the gap is a whole lot less then doing it over. Checking the gap is no cost insurance.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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Re: Which Copper Plugs

Post by erikv11 »

Ugh. No one is saying to not check the gap, of course you check it.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'99 Camry V6 :shock: 130k
gone: '96 NA 850 210k, '98 NA V70 182k
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Re: Which Copper Plugs

Post by abscate »

It is an important enough issue that they remind us at every train station.
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mecheng
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Re: Which Copper Plugs

Post by mecheng »

Has anyone tried NGK?
1998 Volvo S70 T5 - SE - 240km - Sold July 2018
1997 Volvo 850 GLT - 190km
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Cookeh
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Re: Which Copper Plugs

Post by Cookeh »

mecheng wrote: Fri Jan 17, 2020 3:11 pm Has anyone tried NGK?
My car had been run on NGK PFR6Bs for at least 80,000 mi of its life. Ran perfectly.
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Re: Which Copper Plugs

Post by Goupil »

I did replace mine with FR7DC, and had to close the gap a little bit.
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Re: Which Copper Plugs

Post by jreed »

For what it's worth, my '97 855 GLT at 212K miles has been using Bosch FR7DC (7955) plugs for the past 140K miles. They have been working good so far. I replace them every 15K miles.
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94
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