Oil pan leaking

[George050994_imp]

Good day everybody!!

I hope you are all having some nice rides and amazing trips

I have come again seeking for help so I can have a better understanding how this beautiful machine works

It has come to my attention some leaking in the oil pan at the left side of my engine and I was just wondering if there's a gasket between the engine and the oil pan, I am not able to see anything in between other than a thin layer of silicone.

What should i do? I'm thinking in removing the whole oil pan then adding some silicone and put it back in my next oil change schedule.

Has anyone experience this before I have attached some pictures so you can have a better idea.

 

[beardyweirdy@me.com_imp]

Hi,

Before you strip it down, you could try torquing up all the engine bolts to make sure they are correct.

If there aren’t any that stand out as loose and it continues you can try it again but loosen each one a smidge then torque up to the correct tightness incase there’s a bit of stiction.

Might be worth casting an eye over the workshop manual too, just to see it there are any notes on it.

Also, with regard to the gasket, I’m fairly sure it’s a liquid gasket and there isn’t a material one in there - not 100% tho. and a look at a parts diag. should confirm.

Good luck.


Sent from my iPhone using Tapatalk

 

[Lord Popgun]

I believe you are the first to report an oil pan leak.

The service manual says to use Three Bond 1207B or equivalent. Amazon has it available. I got mine there.

A Google search says the Locktite equivalent is 5970 but 1207B is much better. YMMV.

SM says to tighten the bolts in a chriscross pattern in 2 or three steps. A specific torque value is not listed or shown.

 

[1973cb750]

id say that coming from the allen plug or higher up the pan uses honda bond gasket maker no gasket but i highly doubt thats the leak clean it and ride a little see if you can see the source better use some carb or brake cleaner

 

[George050994_imp]

Hi!
Quick question, where is this big allen bolt connected to? Is it going through the oil pan? Or is it going to the crankcase? Should I tighten this one as well? Because I have tighten all small 8mm bolts underneath based on popgun advise (thank you btw)
I will ride this afternoon to the city to get some groceries and I will check if it's still leaking.
I can't thank you guys enough for your replies and I appreciate all the help you are always willing to provide :beerchug:

 

[Lord Popgun]

I can’t find anything specifically on that big allen bolt in the SM or even a good picture in the crankcase section. Typically ones like that are gallery plugs and this appear to be one of them. There are others on the engine that are very obviously gallery plugs. The parts listing doesn’t seem to show it, but you can look here, or pick a different year: https://www.partsfish.com/oemparts/a/hon/511a8d7ef870022e4ccd3242/crankcase
One of the listed flange bolts is it, I would imagine.

Gallery plugs are usually a install at the factory and never touched again kind of thing. At least mine is bone dry. Hope it stays that way

Before you go messing with a lot of bolts, you should follow the above advice and clean off all the oil and just ride the bike. After every ride check for leaks and find the actual source and go from there.
Oil leaks can be in places that are not where the oil ends up due to wind blowing it, or dripping, etc.

 

[max]

Can it be the chain lube? the bike is leaning over when parked and some lube may gradually find it's way down the surface of the engine.



Using wd90 gear oil this is what my left side of the engine looks like, it just wicks down to this part of the block.
Does not worry me because the paint does not corrode under that " protective layer ", just something to check.

 

[Lord Popgun]

Can it be the chain lube? the bike is leaning over when parked and some lube may gradually find it's way down the surface of the engine.



Using wd90 gear oil this is what my left side of the engine looks like, it just wicks down to this part of the block.
Does not worry me because the paint does not corrode under that " protective layer ", just something to check.

Max, Greta Thunberg wants to have a word with you…

 

[peterbaron]

I can’t find anything specifically on that big allen bolt in the SM or even a good picture in the crankcase section. Typically ones like that are gallery plugs and this appear to be one of them. There are others on the engine that are very obviously gallery plugs. The parts listing doesn’t seem to show it, but you can look here, or pick a different year: https://www.partsfish.com/oemparts/a/hon/511a8d7ef870022e4ccd3242/crankcase
One of the listed flange bolts is it, I would imagine.

Gallery plugs are usually a install at the factory and never touched again kind of thing. At least mine is bone dry. Hope it stays that way

Before you go messing with a lot of bolts, you should follow the above advice and clean off all the oil and just ride the bike. After every ride check for leaks and find the actual source and go from there.
Oil leaks can be in places that are not where the oil ends up due to wind blowing it, or dripping, etc.

+1 .... rule # 1 = diagnose it first before any attempt!!!

 

[GoldOxide_imp]

Can it be the chain lube? the bike is leaning over when parked and some lube may gradually find it's way down the surface of the engine.



Using wd90 gear oil this is what my left side of the engine looks like, it just wicks down to this part of the block.
Does not worry me because the paint does not corrode under that " protective layer ", just something to check.

Max, Greta Thunberg wants to have a word with you…

Max, Greta Thunberg wants to have a word with you…
lol - for sure Popgun.

If it is slung chain juice (like W90 gear oil, or similar), at least it will hide any real lump leaks you may have.

 

[1973cb750]

I can’t find anything specifically on that big allen bolt in the SM or even a good picture in the crankcase section. Typically ones like that are gallery plugs and this appear to be one of them. There are others on the engine that are very obviously gallery plugs. The parts listing doesn’t seem to show it, but you can look here, or pick a different year: https://www.partsfish.com/oemparts/a/hon/511a8d7ef870022e4ccd3242/crankcase
One of the listed flange bolts is it, I would imagine.

Gallery plugs are usually a install at the factory and never touched again kind of thing. At least mine is bone dry. Hope it stays that way

Before you go messing with a lot of bolts, you should follow the above advice and clean off all the oil and just ride the bike. After every ride check for leaks and find the actual source and go from there.
Oil leaks can be in places that are not where the oil ends up due to wind blowing it, or dripping, etc.

+1 .... rule # 1 = diagnose it first before any attempt!!!

+1 .... rule # 1 = diagnose it first before any attempt!!!
:beerchug:

 

[the Ferret]

In the old days we would clean the spot and then spray on a dry white powder like foot powder to see where it gets damp

 

[max]

George have you cleaned the area and checked for where the oil appears from?

Because this photo looks identical to your third picture according to the screenshots i have from both.

 

[George050994_imp]

Hello!

Yes I did clean this side of the engine with some gas and I confirmed the oil leak is coming from this thin layer of silicone :-/.

 

[max]

In the mean time things are looking up, Greta was on holiday in NZ and emailed me, once i explained i had a wooden leg and had trouble cleaning the bike she volunteered and cleaned the oily mess up in my driveway.

Have to agree it's much better looking now and Greta is happy for an old guy like me to drive it round for a few more years and posed in front of the bike to thank the forum members for their support in getting the job done, what a nice thing to do!





Just amazing what can be achieved when the stars line up together:excited

 

[Lord Popgun]

:rofl: :rofl: :beerchug:

 

[peterbaron]

^^:rofl::rofl:^^
:clap:

 

[GoldOxide_imp]

lol max. Did you manage to get a tip on what she used to breakdown and clean-up the oil stain? And why isn't she wearing leather ("leather" - is that still allowed?) moccasins?

= = =

Here is to hoping the CB1100 posted oil leak is a non-issue. :biker:

 

[max]

GO she always carries some " seal oil " ( get it ? ) with her and it is a renewable product which is
environmentally friendly and sustainably extracted from " selected animals " who volunteer to save the planet, it does a great cleaning job!

The jacket she wears is nylon which apparently is exempt from " just stop " for practical reasons, i could go on but.....

 

[George050994_imp]

Stares in Greta