? I always have just tightened the spark plugs until I feel the crush sleeve yield, and then a bit more ?
If they're threaded straight and the socket is straight on the plug then I would think you'd really have to be yarding on the wrench to get the head to strip out...
Rising Sun Bio
2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering,
no more Sanden OBA
1FZ-FE factory lockers +
Safari intercooled turbo, CDL switch, cup holder, Metric TLC leather, heated seats, JDM switches, PUMA OBA.
Warn M12000 waiting for a bumper.
Limited TRD 2UZ-FE SOLD