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proper spark plug gap? 850 1995

posted by  Mr. Detail on  Thu Jun 2 06:09 CST 2011
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last visit: Mon Sep 8 11:44 CST 2014
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I want to change out my spark plugs and plan to buy a set of Bosch FR7DC copper plugs. Can someone please tell me again what the proper gap would be for these?
Maybe they are already gapped.








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proper spark plug gap? 850 1995

posted by  jadnhm on  Thu Jun 2 07:52 CST 2011
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last visit: Tue May 22 18:03 CST 2012
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The factory gap is listed in your owner's manual, which is either in your glovebox or online here:
https://www.customers.volvocars.com/owners/ownerlibrary.aspx

For my car (1998 AWD with LPT) the gap is as follows:
Spark plugs Bosch FR 7 DC or Champion RC9YC
Spark plug gap 0.028" (0.7 mm)
Turbo-charged models: Champion RC8PYP (or equivalent)
Spark plug gap 0.03" (0.75 mm)

I personally am using a larger gap based on some encouragement I read on another forum
http://volvospeed.com/vs_forum/topic/91668-slightly-increased-spark-plug-gap-for-those-running-stock-boost/

I started using NGK BKR7E which I now see is maybe a bit on the cold side for my car, and I found the idle a bit rough. Increased plug gap made things real smooth.

--
1998 V70 AWD->FWD->AWD Turbo 215k+







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