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FE Technical Forum / Lead substiute
« on: June 26, 2023, 06:21:45 PM »
I'm wondering if anyone who has been using MOTOR MEDIC lead substitute and on disassembly noticed a black buildup on the back of the intake valve. At 1,000 miles an unrelated condition required heads off and that is when I noticed this. Seems sort of sticky and resists removal with a wire wheel way more than a carbon or oil buildup would. I may have overdosed because I did not actually measure fluid ounces but just took a guess (figured not too important). I'm using the stuff because my exhaust seats are factory cast iron. Also, do I really need this additive?