Vintage and Classic Hondas

Jug O-Rings

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RodneyCB750K1979
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Jug O-Rings

RodneyCB750K1979
Some parts diagrams show large o-rings around the base of the four cylinders.  Mine doesn't appear to have o-rings unless they are so old and deteriorated to see.  Comments?  This is a 1979 Honda CB750 L  DOHC.

TOOLS1
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TOOLS1
Administrator
 I can't tell from the picture if they are there, or not, but there are supposed to be O-rings there. They are very skinny, have you tried cleaning the groove with a dental pick? That's how I remove them.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."

1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
RodneyCB750K1979
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RodneyCB750K1979
I tried prying with a very small screw driver and it doesn't look like rubber material.  The material is below the aluminum surface. My engine gasket kit did not have o-rings.  
Lucky 1
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Lucky 1
Many "kits" are missing parts. Very common.
Not sure what the "L" stands for but you can look
it up on the Bike Bandit webpage under OEM parts.
You have one of the most powerful tools in the world. The internet.


This is the 1979 CB750K .
On a Roadstar Adventure.
RodneyCB750K1979
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RodneyCB750K1979
I ordered a set of 0-rings.  I decided to start digging and was able to verify there is an o-ring there and it was so dried and cracked, I had to dig it out in pieces.  Probably due to the age and heat and also exposure to paint remover and solvents.



I wanted to be sure an 0-ring was there before I screwed something up.  Thanks for everyone's help.
SoonerRon
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Re: Jug O-Rings

SoonerRon
In reply to this post by RodneyCB750K1979
Do yourself a favor and get some orings on there. I screwed up on my rebuild and forgot to install them. Now I have a leaky engine. Not much but enough to really hack me off.
1979 CB750K
1978 CB750 Four SS (gone but not forgotten!)
RodneyCB750K1979
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RodneyCB750K1979
OMG. What a bummer.

I forgot to install a dowel pin on my clutch cover.  Should I remove the clutch cover with it's new gasket coated with sealant to install this dowel?  Not as bad as the jug o-rings.  Engine has to come out to fix that.
TOOLS1
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TOOLS1
Administrator
You know, you only put sealant on the cover side of a gasket, and never the case side. So since I'm sure you already knew this, and only put sealant on the cover side, go on, and remove it to install the dowel. However if, you forgot, and put sealant on both sides of the gasket, don't worry about it. Just hang onto the dowel in case you ever remove the cover again.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."

1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
Lucky 1
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Lucky 1
I agree with TOOLS1.  There are two dowel pins. I looked it up for you.
On a Roadstar Adventure.
RodneyCB750K1979
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RodneyCB750K1979
I learn something every day. I put sealant on both sides of the gasket to prevent leakage but see now the advantages of sealing one side only. With one dowel pin in place, the center pressure point shouldn't be too far off.  
750K8
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Re: Jug O-Rings

750K8
When you rebuild my CB450 Rodney, you need to document every single step. No mistakes with Honda's awesome race twin motor.
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