Oil leak mystery... By nalrac (Read 7,407 times)

[nalrac]

I just found this, and it says that the seal is 25x40x5... Does that sound right? .roketa.com/product/parts_detail.jsp?partId=5452&partName=ENGINE%20ASSEMBLY(3)" rel="nofollow" target="_blank">.roketa.com/product/parts_detail.jsp?partId=5452&partName=ENGINE%20ASSEMBLY(3)

[sprocket]

No that is the bearing seal for the trailing arm...

[alleyoop]

Here you go get the following seal:
Ok Troops,
Sprocket mentioned that a 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....

So I googled for the seals and found the HONDA Oil Seal and I just ordered 4 at $2.11 each plus $1.75 shipping.
Alleyoop
.powersportsplus.com/parts/detail/honda/HP-91201-KCW-880.html" rel="nofollow" target="_blank">.powersportsplus.com/parts/detail/honda/HP-91201-KCW-880.html

[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.

Question for JR: You mentioned using Red RTV as a sealer on the pre-cut gasket. Can you give me some details about how you do that? Is it a thin layer on one side or both? Which side?

Thanks! You guys are awesome

Adam

[JR]

Adam what I do is clean, clean, clean and then I place a thin layer on the engine side with my finger, just a nice thin coat, then place the same thing on the outside cover, place the gasket in place on the engine, then carefully place the outside cover on. put all the blots in and pull them down a little at a time until it's properly torqued.

Any excess silicone that might ooze out wipe off while wet and then put her together, give it say 30 minutes to set, fill her up with oil and warm her up, let her cool and check the bolt torque again.

Again just a very thin layer so thin that you can at least notice it's there, it will not hurt the gasket and is just a little more insurance of a good seal. The red RTV or some call it "gasket maker" is at all auto parts and can stand extreme temps and some people don't even use a gasket but use this stuff alone. Clean is the key and then all will be well.

JR

[nalrac]

Thanks JR,

I picked up some red RTV yesterday. I'll follow your recommendations and let you know how it goes. Thanks!!

Adam

[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?

[JR]

A defective seal or it was damaged during installation is the only two things I know of that can cause this?

JR

[nalrac]

OK. In your experience, can I remove the cover without destroying the gasket?

[sprocket]

You may have a hairline crack.. I have seen that happen. Your florescent stuff should show you the crack... Often occurs from over tightening bolts, sometime just poor castings, inclusions etc.