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I dont want to drain my oil to check this myself so does anyone know the thread size for the 4bd1t oil pan drain plug?
 

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Pulled the oil pan drain plug on a '89 4BD1T. It has M20 x 1.5 threads.
 

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That's a Fumoto valve. Got one on my pan, makes oil changes über easy.
 

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That's a Fumoto valve. Got one on my pan, makes oil changes über easy.
Depending on the exit direction of the drain plug, these valves could possibly be broken off by rocks, branches, etc. This would be especially true if they point straight down. Probably not an issue on the 4BD1/2s as they would protrude mostly to the side.
 
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