Oil Drain Plug Crush Washer-Stupid Question

rmorrow · 07-09-2010, 06:13 PM

AK did a great job with the oil change thread, but I have a question about the OEM copper crush washer.
One side of the washer has a greater amount of surface area, and a very small indention/cut-out in the ID of the washer. The other side has a smaller amount of surface area. In AK's DIY Oil Change Thread (Step 6) there is an enlarged view of the washer. Does the side of the washer closest to me in the picture (the side with the small cut-out in the ID) go against the oil pan, or against the head of the drain plug? I used to change my oil all the time, many years ago. This was when the washer was a reusable washer. A disposable washer is new to me.
Stupid question, but I damn sure do not want to put the washer on incorrectly.
I am blind as a bat anyway, so both sides look flat to me...

azn370z · 07-09-2010, 06:21 PM

Place the larger side against the oil pan. But it really won't make a difference which way it goes.

NeedforZ · 07-09-2010, 06:22 PM

lol... I wondered the same thing the first time I changed the oil..

http://www.the370z.com/nissan-370z-g...ientation.html

Trips · 07-09-2010, 06:27 PM

Asking a Stupid Question is Better than Making a Stupid Mistake. In this situation your good.

rmorrow · 07-09-2010, 07:03 PM

Thanks guys. I do feel kind of like an idiot now. When I put the side with the small notch against the head of the drain plug, and then look directly down at the plug, it is kind of obvious that it fits this way.

07-09-2010, 06:13 PM	#1 (permalink)
rmorrow Base Member Join Date: Jun 2010 Location: Houston Posts: 79 Drives: 2010 370z Sports MT Rep Power: 14	Oil Drain Plug Crush Washer-Stupid Question AK did a great job with the oil change thread, but I have a question about the OEM copper crush washer. One side of the washer has a greater amount of surface area, and a very small indention/cut-out in the ID of the washer. The other side has a smaller amount of surface area. In AK's DIY Oil Change Thread (Step 6) there is an enlarged view of the washer. Does the side of the washer closest to me in the picture (the side with the small cut-out in the ID) go against the oil pan, or against the head of the drain plug? I used to change my oil all the time, many years ago. This was when the washer was a reusable washer. A disposable washer is new to me. Stupid question, but I damn sure do not want to put the washer on incorrectly. I am blind as a bat anyway, so both sides look flat to me...

07-09-2010, 06:21 PM	#2 (permalink)
azn370z A True Z Fanatic Join Date: Nov 2008 Location: Seattle Posts: 1,722 Drives: z34 - R1 Rep Power: 489	Place the larger side against the oil pan. But it really won't make a difference which way it goes. __________________ 2010 k23 H&R sport springs / Spc rear camber arms / SSR SP1 / Berk cbe / Varis cf lip / Nismo S-Tune side skirts

07-09-2010, 06:27 PM	#4 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,728 Drives: 🔰 Rep Power: 10	Asking a Stupid Question is Better than Making a Stupid Mistake. In this situation your good. __________________

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07-09-2010, 06:22 PM	#3 (permalink)
NeedforZ Base Member Join Date: Mar 2009 Location: DFW Texas Posts: 163 Drives: 370z Touring 7AT Rep Power: 16	lol... I wondered the same thing the first time I changed the oil.. http://www.the370z.com/nissan-370z-g...ientation.html

07-09-2010, 07:03 PM	#5 (permalink)
rmorrow Base Member Join Date: Jun 2010 Location: Houston Posts: 79 Drives: 2010 370z Sports MT Rep Power: 14	Thanks guys. I do feel kind of like an idiot now. When I put the side with the small notch against the head of the drain plug, and then look directly down at the plug, it is kind of obvious that it fits this way.