I can never seem to get the conventional copper washers used on sump and gearbox drain plug bolts to seal 100%. Even with a brand new washer, blue hyolmar and the correct torque, there'll always be annoying drips, it seems. So this time, having changed the engine oil, gearbox and transfer box oils, I've used ordinary steel washers, but wound a couple of loops of PTFE thread tape around the bolts before re-inserting them. No sign of a single drip yet! But I'm just wondering (since I've never seen this practice ever recommended anyplace) if there's anything I've overlooked by doing this that might bite me in the arse a few hundred miles into the future. Any ideas?
- posted
8 years ago