Author Topic: Chain gouged the oil seal on my cb550f (Read 7344 times)

Chris Liston · « **on:** December 14, 2011, 09:08:26 PM »

Long story short while riding today the bracket that keeps the center stand from hitting the chain came loose causing my center stand to basically ride the chain and put a nice chain gouge in the stand. I hadn't realized it was happening in the quick ride around the block. So while seeing if it caused any damage I popped off the sprocket cover and was greeted to a nice pool of oil. With the center stand putting pressure on the chain it must have caused the chain and sprocket to move inward just abit to the engine and the leading edge of the chain to put a small cut/gouge in the oil seal between the two cases.

Here is a pic:

Can this seal be replaced without breaking the cases apart? I believe I have the replacement in a 550 Oil Seal Kit I purchased a few years ago when I replaced a leaking shifter shaft seal.

I tried searching other posts but couldn't find a definitive answer.

Thank you...

dave500 · « **Reply #1 on:** December 14, 2011, 09:47:27 PM »

was the pool of oil more or less inside that little separate area that covers the oil pump?was the seal as clean as that or have you cleaned it?if the seal was that clean its not leaking but your oil pump o rings are,,this fills up that void in the cover and spews out when you remove it,ive seen those seals much worse than yours and not leaking,you can change them without splitting the case,you can even use a brass freeze plug in it.

CoachDoc · « **Reply #2 on:** December 14, 2011, 09:50:30 PM »

First, are you using an O-ring chain. That gouge is exactly what I and many others have previously posted due to the too wide O-ring chain. Second, in your photo it doesn't look like that large seal is leaking. It is probably 3-4 mm. thick, and you've just barely gotten into it. I wonder if there was a PO who may have used an O-ring chain and you never had reason to look for the damage until prodded by your episode today. Anyway, if you don't see any oil leaking from that seal, then your leak is elsewhere. If that seal is indeed leaking, someone (TT perhaps) previously posted that you have to split the cases to replace it.

dave500 · « **Reply #3 on:** December 14, 2011, 09:56:15 PM »

you can use a self tapping screw and lever it out then tap a new one in like you would the countershaft seal,i dont think that seal is leaking.

Chris Liston · « **Reply #4 on:** December 14, 2011, 10:00:56 PM »

There is no o-ring chain on the bike. I've had it since 2000.

dave, now that you mention it the oil was pooled in that area over the pump. I know the seal wasn't gouged previously and that my chain must have done it when the center stand put pressure on it. I will have to run the bike and inspect the area with the cover off. I did clean the seal once I removed the cover to get a better look at it. If it is the oil pump seals are the available from Honda?

Frostyboy · « **Reply #5 on:** December 14, 2011, 10:19:15 PM »

I was one who suffered damage there from an oring chain also & it ground away at the cases as well. You don't have a problem with that seal. If you are tempted to change it as Dave described, have a look at the new seal first. I'm not certain, but I think there's a locating dowel. I'd leave it be if it was mine.

Dimitri13 · « **Reply #6 on:** December 14, 2011, 10:23:21 PM »

I had the same problem (oil pooling in the front sprocket cover). It was because the PO installed an aftermarket oil pressure gauge and that started leaking. I just took some teflon tape to the threads that go into the case. Haven't had a problem since.

dave500 · « **Reply #7 on:** December 14, 2011, 10:47:17 PM »

no location dowell on the seal,if the oil is from the pump it may be a slow leak and taken a while to build up under the cover,i get the o rings for the pump at any bearing service,i use two 13.6x 2.4 and one 47x 3.2

Frostyboy · « **Reply #8 on:** December 14, 2011, 10:56:50 PM »

Quote from: dave500 on December 14, 2011, 10:47:17 PM

no location dowell on the seal

Cheers for the clarification Dave, like CoachDoc said, I could remember something TT referred to once as well, I just found it here.
http://forums.sohc4.net/index.php?topic=1526.msg10800#msg10800

bryanj · « **Reply #9 on:** December 14, 2011, 11:30:28 PM »

The oil pump cover seal is the one that frequently leaks and Honda dont supply it or list a part number

Chris Liston · « **Reply #10 on:** December 17, 2011, 02:11:24 AM »

I went in with a flashlight and pretty one of the small orings is leaking on the pump as there is oil in the space right in front of it. I ordered the 3 new orings. I'm going to put alittle black rtv around the plug to seal that up. Hopefully be next week I'm leak free.

It must have been happening for some time as I though it was a leaky oil pan gasket and had replaced that but I did notice alittle oil leak around the gasket area and it more than likely is the leaky oring on the pump. Thanks

dave500 · « **Reply #11 on:** December 17, 2011, 02:48:54 AM »

if the o rings cant seal it,,rtv wont,dont use silicone on these important seals,,new o rings will do the job im sure.

Chris Liston · « **Reply #12 on:** December 17, 2011, 05:33:10 AM »

I do plan on running the bike prior to pulling anything off to verify the actual location of the leak and go from there. Based on the fact that the oil was pooled in the oil pump location in the sprocket cover. If the counter shaft plug is not leaking the rtv will just be to cover the area that the chain wore off the rubber. Don't worry, I plan on fixing , not bandaiding. Western Hills had the 3 orings for the pump and I ordered them last night. I'm going to thoroughly clean the area over the weekend and then run it next week and keep an eye on the the suspected problem area and proceed from there.

Hopefully I get this cleared up in the next few weeks.

Chris Liston · « **Reply #13 on:** April 04, 2012, 06:54:14 AM »

Well, I cleaned everything up. The countershaft seal is not leaking. I replaced the 3 orings behind the oil pump and the one on the side with the spring inside.
The one that appears to be still leaking and 'just alittle bit' is the oil pump cover seal. I've read here that it is no longer available from Honda.
Has anyone bought one from a hardware store and just matched it up?

Thanks

Duanob · « **Reply #14 on:** April 04, 2012, 08:27:40 AM »

LOL I'm always greeted by a pool of oil when I remove the sprocket cover. I've replaced all the seals at the shafts now the oil pump is the only culprit left. It's really nothing I worry about but I get to it when I can. Also your gouged oil seal is pretty common on these bikes. Frankly I've never seen one that wasn't a little gouged. As long as it doesn't break through your fine.

Curious what the part numbers are for the oil pump o-rings or what size they are? Anybody have that info would be greatly appreciated.

bryanj · « **Reply #15 on:** April 04, 2012, 09:56:30 AM »

I have some cover "O" rings but postage to the US will be a killer for you. PM if you want to go ahead and i will get a price BUT I am away till the 15th April

Chris Liston · « **Reply #16 on:** April 04, 2012, 11:37:11 AM »

http://www.westernhillshondayamaha.com/fiche_section_detail.asp?section=123123&category=MOTORCYCLES&make=HONDA&year=1976&fveh=2943

Duanob · « **Reply #17 on:** April 04, 2012, 12:24:06 PM »

Thanks guys.

Bryan I'll probably just buy them here in the states, thanks.

Chris did Western Hills have the o-rings in stock or did they have to order them from japan?

Chris Liston · « **Reply #18 on:** April 04, 2012, 04:53:47 PM »

I'm not sure if they had them in stock or needed to order them.
The o-rings that I replaced were number
18 - 2 of them
19 - 1
21 - 1

They cover o-ring isn't even listed. Not sure what size or part number it would be. Bryanj, do you have the part number?

Thanks

TwoTired · « **Reply #19 on:** April 04, 2012, 05:06:23 PM »

Quote from: Chris Liston on April 04, 2012, 04:53:47 PM

They cover o-ring isn't even listed. Not sure what size or part number it would be. Bryanj, do you have the part number?

I'd like the dimensions of that cover o ring, to do a local search.

Cheers,

dave500 · « **Reply #20 on:** April 04, 2012, 10:29:59 PM »

i took a pump body and cover down to my local bearing supply and we just sized one up,,i bought four of them,,i shouldve kept the invoice with the size on it!

bryanj · « **Reply #21 on:** April 04, 2012, 10:38:48 PM »

TT I worked it out as 46 x 2 and There is an O ring of the same size used on a Goldwng,
part number 93105-216-000 or 91305-426-003,

TwoTired · « **Reply #22 on:** April 04, 2012, 10:43:52 PM »

Quote from: bryanj on April 04, 2012, 10:38:48 PM

TT I worked it out as 46 x 2 and There is an O ring of the same size used on a Goldwng,
part number 93105-216-000 or 91305-426-003,

Thanks Brian!

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Author Topic: Chain gouged the oil seal on my cb550f (Read 7344 times)