Vintage and Classic Hondas

Oil System

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Hoko
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Oil System

Hoko
What parts in the oil system on old SOHC bikes are weak and could possibly leak and cause the engine to lose oil pressure and what should they be replaced with?  I would like to make sure this never happens.
78 CB750F3 Super Sport
Austin, TX
Re-run
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Re: Oil System

Re-run
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As long as the bypass in the filter housing is working right, there isn't much. Mainly the filter screen and pump. Keep the screen clean and every so often check the pump clearances.

A bigger issue is clogs in the oil galleys in the head. Use a good oil with good detergents, such as rotella, and you can minimize this risk.
The ride IS the adventure. The destination is just to get gas!
TOOLS1
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Re: Oil System

TOOLS1
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In reply to this post by Hoko
About the only problem I have ever heard of with the SOHC is that they are highly allergic to RTV Silicone.
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)
shinyribs
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Re: Oil System

shinyribs
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The o-rings that seal the oil pump to the engine shrink and will leak. It won't really show up on a gauge (trust me) but it can cause a loss of pressure. I replaced mine on my chopper and it started shifting better. So replaced the ones on my '76F and IT started shifting smoother,too. Easier to find neutral as well.

Maybe it won't lose so much pressure to cause damage to the engine,but it can affect that countershaft thingy in the tranny and allow it to kinda shift sloppy.

Sorry. I know that's a vague explanation. I can't really explain what all is going on, I just know I saw definite improvements by doing this.
Hoko
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Re: Oil System

Hoko
Thx for that info, I'm going to be cleaning that screen soon anyway, I can replace the oring then. :)  So, why is RTV Silicone bad for the oil system?
78 CB750F3 Super Sport
Austin, TX
TOOLS1
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Re: Oil System

TOOLS1
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Because it squeezes out inside, and then breaks off in little balls, and clogs up the oil passages. Just ask Shiny about it.  
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)
Hoko
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Re: Oil System

Hoko
TOOLS1 wrote
Because it squeezes out inside, and then breaks off in little balls, and clogs up the oil passages. Just ask Shiny about it.  
TOOLS
Ah, yes that would not be good, thx for that info.  
78 CB750F3 Super Sport
Austin, TX
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