Oil leak mess! By nalrac (Read 6,455 times)

[Bashan]

Well what I think is that you were right and I was wrong. That shouldn't be that hard and you'll save yourself a boatload of money. We'll have to remember the UV dye, that's a great diagnostic tool. Let us know how it shakes out. Rich

[nalrac]

Thanks Rich! I'll get it installed and let you know how it goes.

The most amazing thing to me, at this point, is how a leak in that location can be picked up by the tire AND the fan and flung/misted everywhere. I mean, there's oil all the way up at my gas tank and fuel pump. I guess that's why it's important to not assume you know where the leak is coming from.

[Bashan]

A couple years ago I decided to make my own windshield lowers for my Vulcan 1500 to help with riding through the winter using my heated suit. What I found with trying different shapes and sizes was really amazing. Just a small change from one template to another would make a huge, and generally unpredictable, difference in the airflow characteristics. Air would change from hitting my knees to bobbling my helmet from side to side with say just trimming an inch off of the sides. I soon realized that on a bike the air swirls and churns all around the myriad parts much more than I could have imagined. My point is, even on the sleekest of bikes, there's going to be a ton of air currents to carry a small oil leak anywhere and everywhere. After trying probably thirty different templates I settled on a compromise that was some better than what Kawasaki offered. So I'm not surprised you had oil everywhere, this seems to be characteristic of scooters and motorcycles. I accidentally left the dipstick slightly loose on one of my scooters a while back and I swear I'm still getting oil off of the bike. Rich

[sprocket]

I agree... a tiny bit of oil sure can travel and get on everything!

[nalrac]

So, I picked up a gasket yesterday. It took a while but I was able to get the cover off and the old gasket stripped. However, there's been some new developments.

When I removed my flywheel I noticed a quarter sized puddle of oil on the lip below the stator. After shining my blacklight on it I could see a trail of oil coming from the crankshaft oil seal. The seal itself was covered in oil (it was glowing really bright under the light). A leaky shaft oil seal explains more easily how the fan could be blowing the oil around.

Now, I have a few questions regarding this and the gasket:

1. I failed to get the size of the oil seal. What should I purchase? I want to pick one up today at the local shop.

2. I was able to use a razor blade and scrape a majority of the old gasket off. However, there's still some residue in a few places. How should I clean this off? Does it matter?

3. Should I use a gasket sealer of some type?

4. Anything I'm missing?

[sprocket]

You can try RTV on the seal, but it is only temporary.

Here is the seal stuff...

Honda has seals that fit the GY6 engines.. they are a bit thicker but work...

Stock seals are 19.8x30x5mm....

Honda part number 91201 - KCW - 880 19.8x30x7mm...

You might try regular dino oil if you are running synthetic oil.. it often leaks at the seals

Switching to dino will often stop it....

[nalrac]

Hey Sprocket,

I have an MC-13-150 and I just found this, and it says that the seal is 25x40x5... Does that sound right?

www.roketa.com/product/parts_detail.jsp?partId=5452&partName=ENGINE%20ASSEMBLY(3)

Also, FYI, I've always been on dino oil.

[Bashan]

Alley's Oil Seal Thread

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[Bashan]

Sept 1, 2011 10:52:03 GMT -6 nalrac said:

I have an MC-13-150 and I just found this, and it says that the seal is 25x40x5... Does that sound right?
www.roketa.com/product/parts_detail.jsp?partId=5452&partName=ENGINE%20ASSEMBLY(3)

Nope, sorry, that's for the swing arm. Rich

[nalrac]

Hey Guys,

I stopped by the local scooter shop here in Charlotte, NC called Carolina Fun Machines. Really nice place and nice people. They had a 19.8x30x5 in stock. After getting home I popped the old one out and confirmed that it is, indeed, a 19.8x30x5. So, it looks like I have everything in order to do the installation over the weekend.

I picked up some degreaser and acetone along with some 3M heavy duty scrub pads. I want to take some time and clean it up while it's torn apart and do it right.

Thanks! You guys are awesome

Adam

[jct842]

for any one chasing a anti freeze leak they make a dye for it too. John

[nalrac]

Yeah. I saw that too. Really great stuff.

[nalrac]

Hey All,

I have some great news and not-so-great news...

Great news: I was able to eliminate the leak entirely at the gasket. I used the red RTV and the pre-cut gasket together as recommended and it worked great. No more leak.

Not-so-great news: Although I replaced the seal there's still a leak behind the stator. I believe it's the lower bolt that holds the stator. It seems that the oil is seeping around it. However, I can't be 100% sure. What I did, though, is remove the stator and fill the bolt hole with the red RTV. I also oiled the crankshaft and filled the area in front of the seal and around the shaft with the RTV. I put it all back together, let it cure for a few hours, and let it run for about 30 minutes with no sign of a leak anywhere. I'm hoping that the problem is solved.

The bike is in the garage for the next few days (a storm is in town until Wed.) but after that, I will do a road test and let you know how it goes.

Thanks,

Adam

[nalrac]

I drove my scooter to work for the first time this morning. There is still a leak behind the stator!

I'm not sure if it's the seal but I assume that it is. I'm pretty certain that it's not overfull. What could cause this?

[Bashan]

I think you'll have to get the dye off the shelf again to figure out where the leak is. Still haven't considered the nuclear option? Just ribbing you, Rich