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Valve seat recession?? B20F head 120-130 1966

posted by  blackjackmc on  Wed Apr 27 09:32 CST 2005
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last visit: Mon Jul 27 10:24 CST 2009
[RELATED]

Gday George. I have been running 100mm of ATF to 30litres of fuel in my rebuilt b20e for 2years now with no sign of seat recession. ATF has high zinc content and is the base of most upper cyl lubricants on the market. It certainly looks like seat degradation, you can insert or try other head with ATF. I rev mine hard and am pleased so far with result. Regards Jack.






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