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Improved gas mileage after a few tweaks; what did I do right? 700 1986

Been there. I would have bet the plug thread was crossed on a new purch.

Besides the PB Blaster, remove the plugs when the engine is warm. The coefficient of expansion is greater for aluminum than steel. Work the plugs in and out after a good long soak of several days.

Important: Before installing new plugs, clean up the head threads with a cotton rag lightly soaked with carb cleaner and a cleaned up old plug. When everything is clean you should be able to twist the plug in all the way by hand.

When using anti seize, reduce the normal torque of 220 in-lbs by 40% to 132 in-lbs and, 132 is not much.

Photo: It was a long time since this electrode last saw daylight. The gap was wide enough to measure with a yard stick. The distributor was also very worn but somehow the car ran fine.

--
Tom F Back to three 940s. Mods, RainX. Lien holder on two more (the kid's). Rust in pieces, '78 245







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