Rebuilt engine start up procedure


Post Reply
User avatar
pouchy750
Forum Regular
Forum Regular
Posts: 41
Joined: Fri May 03, 2013 9:08 pm
Location: N.Vancouver/BC
Location: N.Vancouver/BC

Rebuilt engine start up procedure

Post by pouchy750 »

I'm about to put the final touches to the rebuilt of a 1979 CBX1000 engine I have put together after somebody else took it apart.
During assembly I lubricated all the journals & parts that were going to move against each other.
But there appears to be a lot of oil ways & passages in the engine that will have no oil in them upon start up.
I'm a little scared of this delay of fresh oil getting to all the necessary surfaces during the initial start up.
Should I crank the engine (no spark plugs installed) on the starter motor for a few minutes (in short bursts) to get the oil through the filter, cooler & passages?
Or is there a procedure I should know about for getting the oil around everywhere initially?
Thanks for all your responses during this rebuild.

daves79x
ICOA Technical Director
ICOA Technical Director
Posts: 4891
Joined: Sun Oct 01, 2006 8:05 am
Location: Knox, PA
Location: Knox, PA

Re: Rebuilt engine start up procedure

Post by daves79x »

Yes, that's exactly what you do - run the starter until the oil pressure light goes 'OFF'. During this procedure, the engine will labor mightily at first, then as the oil gets to where it needs to, it will spin very freely until the light goes out. This will take maybe 30-40 seconds. Then let the bike sit that way overnight to let the oil saturate everywhere inside, then you should be good to start.

Another caution - drop the oil, filter and sump pan at 50 - no more than 100 miles. This is when you'll get the most debris from the rebuild procedure. Clean everything out, new oil and filter and run for about 300 more miles and repeat. If all's clean then, you're good to go.

Dave

EMS
ICOA Member
ICOA Member
Posts: 10151
Joined: Wed Mar 05, 2003 7:55 am
Location: North East OH, ICOA 3904

Re: Rebuilt engine start up procedure

Post by EMS »

If you crank the motor without spark plugs installed, make sure you ground the plugs/caps somehow. Otherwise you may fry the coils. :naughty:
Or you can just turn the "engine run" switch to "off"

Post Reply

Return to “ENGINES: Maintenance, Performance, Parts Sources”