Author Topic: Oil pump - oil leak seal ?  (Read 521 times)

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Offline greenjeans

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  • 1972 CB750K2
Oil pump - oil leak seal ?
« on: August 01, 2011, 04:35:46 PM »
1975 CB750K

Last few times I've been out riding, I've noticed afterwards that my oil tank is very full.
Almost so full that I worry that there is no oil in the motor.  It also was full enough to cause some oil to come out of the tank - at the cap.  The cork seal is intact and has a pretty good indention of where it conctacts the tank.  I took the easy way out and just flipped it around.  I have a new cork seal ordered.  The idiot (oil light) light works - it flickered last week, so I immediately got 1/2 quart of oil in there.   This bike is somewhat new to me.  I have done all the routine safety things, and the 3000 mile tuneup.   I have also dropped the oil pan and cleaned it and the screen for the oil pump thoroughly.  I had the chain oiler all the way out so I threw about a quart of oil on the chain.  That has since been tightened so that very, very little oil comes out at all.

So....  It sounds  like I have too much oil in there ??    That doesn't seem right to me because at the last oil change, I dropped the oil pan, and the bottom of both hoses to make sure the tank was free of debree.
I put 3.75 quarts back in there. 

Could I have a clogged relief valve ?

Sounds like I need to drop the oil pan again and see whats up.

Anything else I should be looking for while I'm in there ?

Do I even need to do this ?
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline raymond10078

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Re: Oil pump - oil leak seal ?
« Reply #1 on: August 01, 2011, 05:26:53 PM »
The manual says - add three quarts, and after running, top off the oil tank - according to the dipstick.

There shouldn't hardly be and oil in the engine - it is a dry sump design.
1978 CB750A (upgrading very, very slowly)

Past bikes - Honda: SL350, CX650C, CB900C, CB1000C, CM450A; Kawasaki: several 1972 750 H2's; Suzuki: TC90J.

Bikes I want: CX650ED, a mid-sized japanese V-twin with ABS.