Oil Leak - Pooling around rear of vertical cylinder

[Porsche Monkey]

I guess my frame will have to wait for powdercoat then.

[Porsche Monkey]

M900 has no head gasket.

There are a few o-rings in there that's all.

So is there anything fancy abouts these o-rings?  I'm not a big fan of my local dealership and prefer to stay away.  I have tons of assorted o-rings at work that I assume would do the job.  If I go this far with it though I may just yank off the other head and clean up the ports while I'm at it. 

[yotogi]

So is there anything fancy abouts these o-rings?  I'm not a big fan of my local dealership and prefer to stay away.  I have tons of assorted o-rings at work that I assume would do the job.  If I go this far with it though I may just yank off the other head and clean up the ports while I'm at it. 

DO NOT TAKE JUST MY ADVICE

I checked my valves this weekend for the first time and replaced the o-rings on mine. I didn't notice anything too special about these, but I imagine that they are special, high-temp o-rings. They are also hell-of tight putting the covers back on, so I imagine you would need ones really close to the original size. They seem to be a little loose going on and off, so there is room for some slop on size. All that said, do you really want an o-ring failure when you don't have to replace them all that often?

If you don't like your dealership, support one of the forum sponsors like Ducati Seattle, I am sure they would mail some to you.

[Porsche Monkey]

I was talking about the o-rings between the cylinder and head. 

[Speeddog]

For the cost of the O-rings vs. the PITA if a substitute one leaks, not worth it IMO.

Caveat...*you* work on a lot of very nice air-cooled motors, so likely your O-rings are top quality.

[Porsche Monkey]

That's exactly what I was getting at.  I have bunches of top quality stuff at the shop. If its just a regular o ring than I probably have several.

[ducpainter]

I'm not sure if they're 'special' or not.

I seem to recall them being green...but my memory isn't like derbys.

[Porsche Monkey]

I'm not sure if they're 'special' or not.

I seem to recall them being green...but my memory isn't like derbys.

That's all I need bud   Its gonna be shitty weather next week, maybe ill have a go at it.

[yotogi]

I was talking about the o-rings between the cylinder and head. 

I don't know why I bothered chipping in on one of your questions given the differences in our experience working on things mechanical.

I seem to recall them being green...but my memory isn't like derbys.

I (now) know you are talking about different o-rings, but the green ones for my valve covers were replaced with black ones from the dealer. If the green signified anything, that may be something that changed recently.

[Porsche Monkey]

Hey no worries at all bud

[ducpainter]

I don't know why I bothered chipping in on one of your questions given the differences in our experience working on things mechanical.

I (now) know you are talking about different o-rings, but the green ones for my valve covers were replaced with black ones from the dealer. If the green signified anything, that may be something that changed recently.

Which makes me think even more they're not 'special'.

I just mentioned the color because a guy that works with the stuff everyday might get a clue about the material required based on the description.

[Porsche Monkey]

Since its just an oil passage it shouldn't be a problem.  I just didn't want to pull the head and find some fancy armunulum crush washers or square orings.  Just have to figger out a nut removing device. 

[Speeddog]

Standard box wrench with a little judicious grinding will let you get the head nuts off.

This will let you put 'em back on:

[Porsche Monkey]

That's what I was envisioning, problem is I don't own any cheap wrenches that I'm willing to butcher.   

[ducpainter]

That's what I was envisioning, problem is I don't own any cheap wrenches that I'm willing to butcher.   

I'll sell you one for big bucks.