In a weak moment I figured it's time to replace spark plugs in my '94 N/A. It still runs fine, but I know the plugs have at least 100,000 miles on them. I Bought the recommended Bosch platinum FR7DP's with standard center ground. The first plug I pulled was Volvo brand with 3 ground electrodes. The Bosch plugs are longer than the OEM plugs - by the height of the center electrode. So my question, is there enough clearance in this engine to run the Bosch Platinums? Or do I need to get the flatter multi-electrode style.
This isn't one for trial and error!
Thanks for any help.
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