In the middle of replacing the oil pressure sensor on a 1FZFE and the FSM (Factory Service Manual) recommends Toyota adhesive 08833-00080 (discontinued), or three bond 1344, or Loctite 242 applied to three threads before installation.
I know others have used everything from Permatex high temp thread sealer to RTV (!), FIPG, or Teflon tape, but the concern with those is that they may leave behind particles and pieces that could get pushed into the oil galley if/when the sensor is removed and replaced in the future. Some even say install it dry as the threads are BSPT (British Standard Pipe Taper) which are designed to seal against themselves.
There appears to be at least a couple Three Bond 1344 variants, 1344J and TB1344E, and it's not clear which is the better one to choose. Both appear to be low strength and fast curing.
Also, when replacing the sensor in a system full of oil, the threads will be dripping so any thread locker or sealer will likely not work as designed unless the drippage is stopped and the threads are cleaned off.
And then there's Loctite 242.
Tossing this out for discussion, experts chime in.
I know others have used everything from Permatex high temp thread sealer to RTV (!), FIPG, or Teflon tape, but the concern with those is that they may leave behind particles and pieces that could get pushed into the oil galley if/when the sensor is removed and replaced in the future. Some even say install it dry as the threads are BSPT (British Standard Pipe Taper) which are designed to seal against themselves.
There appears to be at least a couple Three Bond 1344 variants, 1344J and TB1344E, and it's not clear which is the better one to choose. Both appear to be low strength and fast curing.
Also, when replacing the sensor in a system full of oil, the threads will be dripping so any thread locker or sealer will likely not work as designed unless the drippage is stopped and the threads are cleaned off.
And then there's Loctite 242.
ThreeBond 1344H | ThreeBond Group
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www.threebond.co.jp
Tossing this out for discussion, experts chime in.
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