Motor turns over hard

Scitter
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Scitter
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Joined: 4:37 AM - Jan 09, 2008

2:56 AM - Feb 08, 2018 #1

Trying to get oil pressure on a motor that had not run in years, I found that the valve in the pump was seized. Once I got oil pressure the engine became very difficult to turn over. Spark plugs are removed. Any advice?
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splitt
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splitt
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Joined: 1:18 AM - Dec 09, 2009

4:48 AM - Feb 08, 2018 #2

One issue that can happen with low oil pressure on a CB750 engine is damaged cam bearings. I use a sharpie to number the bearing caps and mark the front so that I reinstall them in the correct order and orientation. Remove the valve cover, then remove each cam bearing cap one at a time. Look where the cam rides on the bearing cap for galling.
"Don't fornicate. With the one you love to hate."

Flogging Molly - The Heart of the Sea.
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CHUCK DV
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Joined: 9:46 PM - Apr 09, 2003

5:11 AM - Feb 08, 2018 #3

The sharpie is a great to mark them but they should be marked this a litter at the stud 
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Joined: 10:24 PM - May 14, 2002

1:16 PM - Feb 08, 2018 #4

Hard to turn over with the starter, or by kicking it..???
Build it the way you want it ..... then learn how to ride it like you own it..
www.lowridersbysummers.com
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Scitter
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Scitter
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6:36 PM - Feb 08, 2018 #5

It is hard to Kick over and the starter struggles also.
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japscrap
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japscrap
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7:31 PM - Feb 08, 2018 #6

If you can get a bore scope and look in the cylinders, you may have had rusty cyl walls and the pistons could be binding from the rust scraped off .
What do you do when you have a billion dollar idea but no money to build the prototype?
The One And Only Gypsy Weeble
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Scitter
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4:58 PM - Feb 13, 2018 #7

Went out to try to turn it over again, cranked over hard for just a second and she fired up. Now it turns over normally. Hope something was just stuck and nothing is broke. But for the time being she is running. Thanks everyone for your thoughts and suggestions. 
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