mxt_77

That could just as likely be caused by not properly torquing the drain bolt, regardless of whether or not you re-used a crush washer. If you had over-torqued it previously, it could've deformed the washer and caused a bad seal, or if you didn't torque it enough then the drain bolt could've backed out on its own.

From my experience, when I do my own oil change, the washer is still flat when I remove it for the next change, but after I once let a dealer do the oil change (not on the S2000), the crush washer was completely deformed when I removed it the next time. This was obviously a result of over-torquing.

w00t692

When you torque the drain bolt, i find it's very obvious when you crush the washer somewhat. It feels like you just stripped the threads, but you just crushed the washer a bit. I torque it until it does that very slightly, and that's always been tight enough.

RobTheGob

I think it's far more likely to be caused by an under-torqued drain bolt - not just as likely.

If you reuse the crush washer and torque the bolt properly - the worst case scenario is a slow leak.

bd307

Here is a reading about washers. FYI, re-using old washer would not cause the damage like someone posted above.

How did you know the oil leak was caused by the old washer?

ans2k

that is a very good point. it did seem like the old washer was over torque. the last oil change was done by the dealer. the washer could have been over torqued. the washer did looked odd. but against my better judgement, i re-used it.

how did i know it was the washer? well everything was torque down by a torque wrench at 90 ft-lbs. when the car was towed back to my place the oil drain bolt was loose. loose as in 1 turn from falling out, well actually less than that, because i put my hand around it and it came out. but it could have rotated a little while it was being towed. and ever since i used a new washer with every oil change, guess what? the oil drain bolt never came loose. for only 25 cents, i rather not risk it.

again, you can never make a judgement call off one extremity, like my case. so far, i guess im the only unlike bastard this happened to. it could all be a very unlucky coincidence that the oil drain bot came loose when i re-used my washer. go ahead and re-use the washer, or hell just buy a J's2k oil drain valve. but, if this happens to you, just post up saying "oops". lol

mxt_77

^ BTW... I'm pretty sure 90ft-lbs is over-torqued, too. From what I recall, the drain bolt only has to be torqued to ~30 ft-lbs. So, maybe you're the one at fault.

w00t692

You torqued your drain bolt to 90 ft/lbs?

what are you retarded?

Like, important suspension components and motor mounts use that much torque.

Not your effin drain bolt.

SgtB

90ft/lbs is %300 torque. I guarantee you the washer smeared and that was the cause of the leak. Common sense will tell you that if a washer shows signs of damage, or deformity, than of course it should be replaced.

ans2k

Yep that would be my fault. Oh well no harm done. No harm no foul. oh well.

SgtB