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Message started by och on 07/29/22 at 13:57:08

Title: Oil drain bolt?
Post by och on 07/29/22 at 13:57:08

Anyone happen to know the size for the oil drain bolt? I was just doing my oil change, and I stripped the bolt a little bit, I'm afraid next oil change I'll strip it completely, so I need a new one.

If anyone can tell me the part number for oem bolt and crush washer, and also the size of the bolt - I'm considering getting a better quality bolt.

Title: Re: Oil drain bolt?
Post by Needles on 07/29/22 at 16:33:35

Supposedly the oil drain plug is either 14mm or 17mm head, depending on the year. Mine is a 2002, and it takes a 15mm...

Title: Re: Oil drain bolt?
Post by och on 07/29/22 at 16:47:36

Mine is a 14mm head, but its a flanged head, apparently its a M12x1.25 20mm bolt. I ordered a zinc plated class 10.9 bolt for my next oil change.

Title: Re: Oil drain bolt?
Post by Smith2 on 07/29/22 at 17:29:31

4A464D250 wrote:

Mine is a 14mm head, but its a flanged head, apparently its a M12x1.25 20mm bolt. I ordered a zinc plated class 10.9 bolt for my next oil change.

This - 12mmx1.25. I personally use the Goldplug or Votex with the magnetic ends. Very good plugs. I've used them on all my bikes. You can get them on Amazon a little cheaper.
https://goldplug.com/shop/mp06/
https://votex-us.com/DP011

Title: Re: Oil drain bolt?
Post by justin_o_guy2 on 07/30/22 at 01:31:39

I bought one with a magnet in the end.

Title: Re: Oil drain bolt?
Post by och on 08/22/22 at 20:49:59

Here is a photo of the OEM drain bolt. It is indeed a M12x1.25x20, but it has a non standard head. It is a 14mm flanged head, which is very small for the M12 bolt, usually they come with 17-19mm heads.

But look at the design of this head. It is tapered, so you can never put a wrench tight onto it, and the edges of the hexagon are filleted, so it is basically pre-stripped. Dumbest bolt design I've ever seen.

http://https://i.imgur.com/6b5Hh7G.jpg

Title: Re: Oil drain bolt?
Post by Garry on 08/23/22 at 02:19:51

It most likely won’t be the bolt that is damaged it will probably be the thread in the crankcase. Alloy is much softer than steel!

Title: Re: Oil drain bolt?
Post by Serowbot on 08/23/22 at 06:30:43

Tighten it like you would a pickle jar... it's not holding anything structural.
People have been known to crack the case tightening them down. (worst feeling in the world)

Title: Re: Oil drain bolt?
Post by och on 08/23/22 at 08:02:49

Ugh, I get that the aluminum alloy case is much softer than the bolt, but the bolt itself is pretty much stripped from the factory. There is not much access room to the bolt, so a 12 point wrench is the most practical tool for this bolt, but it cant really grab the head. I will replace this bolt with an allen head next oil change.

Title: Re: Oil drain bolt?
Post by justin_o_guy2 on 08/23/22 at 11:03:29

That is another place to grind a tool.
The sides that fit the bolt head don't start to create the corner until a ways from the radius of the wrench. Grind the wrench and it will be able to grab the part of the bolt down at the bottom of the head,where it still has the flats meeting properly instead of the part where the bolt looks rounded.

Title: Re: Oil drain bolt?
Post by och on 08/23/22 at 13:49:33

7D6264637E7948784870626E25170 wrote:

I dont know if its clear in the picture, but the head of the bolt is tapered, you can never get the wrench all the way to the flange of the head, it always slip onto the rounded part of the head, and easily strips it even further. Considering that this bolt is bound to be oily, it only makes things even worse. I was having a bit of trouble with it during my last oil change, I thought I had stripped it.

For my next oil change, I bought an allen socket bolt, should make things way easier. https://www.mcmaster.com/96144A292/

http://https://i.imgur.com/GwQYao2.jpg

Title: Re: Oil drain bolt?
Post by justin_o_guy2 on 08/24/22 at 03:37:52

I wasn't suggesting you keep that screwed up bolt.