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If you are talking about how to treat your car from new, then no, a citric flush is not needed if you perform the semiannual flush and refill recommended in the service manual.
if you are talking about repairing a neglected car that is having cooling system issues, it's best to start with a standard drain, and water flush, see if chunks of anything come out, and look for rust, or sediment in the block drain water. if this is found, then a citric flush may be warranted, but it can cause damage to a weak radiator/water pump, so prepare for more work if you start it...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!
My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!
1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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