« previous next »
Pages: [1]   Go Down

Author Topic: OIL TANK WON'T DRAIN INTO CRANKCASE  (Read 626 times)

0 Members and 1 Guest are viewing this topic.

copshop

  • Guest
OIL TANK WON'T DRAIN INTO CRANKCASE
« on: May 20, 2008, 06:50:53 AM »
DOING RESTORE ON 77 CB750. FRAME 77...ENGINE  A 73.  OIL DRAINED BEFORE TOP END REDO.  ENGINE IN FRAME NOW AND OIL TANK FILLED BUT OIL WILL NOT DRAIN INTO CRANKCASE...ENGINE TURNED OVER SEVERAL TIMES NO CHANGE...NEVER DONE LIKE THIS BEFORE...WHERE HAVE I GONE WRONG.
Logged

Offline Bob Wessner

  • "Carbs Suck!"
  • Really Old Timer ...
  • *******
  • Posts: 10,079
Re: OIL TANK WON'T DRAIN INTO CRANKCASE
« Reply #1 on: May 20, 2008, 07:00:07 AM »
Not sure what you are describing. The oil flow is from the tank to the pump, to the engine, then drains to the sump where a scavenge pump returns it to the tank. Are you saying you are concerned that after the rebuild you are no getting oil pressure and lube to the engine?
Logged
We'll all be someone else's PO some day.

Offline mystic_1

  • Really Old Timer ...
  • *******
  • Posts: 6,071
  • 1970 CB750K
Re: OIL TANK WON'T DRAIN INTO CRANKCASE
« Reply #2 on: May 20, 2008, 09:03:40 AM »
The tank will not 'drain' into the engine, in fact it's specifically designed NOT to.  Oil is PUMPED into the engine by the oil pump, you won't see any change in the oil tank level just by turning the engine a few revolutions.  If you're concerned about lubrication for initial startup, pour in half a quart or so via the tapped covers and let it trickle down.


mystic_1
Logged
"A ship in harbor is safe, but that is not what ships are built for."
- John Augustus Shedd

My build thread:  http://forums.sohc4.net/index.php?topic=68952.0
Pages: [1]   Go Up
« previous next »