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My '70 Charger (numbers-match 318, never opened up as far as I can tell) has an intermittent lifter tap when cold. One lifter, driver side bank, flat refuses to pump up for about five minutes - until the engine is at FULL temperature. Doesn't happen every time, either, so I'm guessing it's some floating gunk in the oil system that sometimes plugs up a galley at that lifter. Car runs fine, doesn't miss when this is going on...but DAMN it's loud.
I seem to remember there's an additive you can put in hot oil, run for a few minutes to circulate it and "scrub" the gunk out of the passages, then drain and change the oil. What is that stuff, any recommendations? I'd really rather not take this engine apart to replace lifters (which will also mean an upgraded cam...I know myself...) if I can help it...but if I have to, I have to.
I seem to remember there's an additive you can put in hot oil, run for a few minutes to circulate it and "scrub" the gunk out of the passages, then drain and change the oil. What is that stuff, any recommendations? I'd really rather not take this engine apart to replace lifters (which will also mean an upgraded cam...I know myself...) if I can help it...but if I have to, I have to.