Force to Rotate Engine

[billrigsby]

 

Before I do the oil pump and oil pan, I am wondering

how much force or pounds exerted should it take to 

rotate the assembled engine by hand with a 1 foot 

long ratchet?

 

Everything seems to rotate easily, going to get a

fishing scale to get an idea of what force is required

of this particular engine.

 

Did a search, but came up with everything but.

 

 

[CO54]

Watching for the response on this, cuz it's good information for a used engine purchase or a rebuild......

Sorry, and thanks, Bill.....

Eric

[Jerry Roberts]

2 hours ago, billrigsby said:

... I am wondering

how much force or pounds exerted should it take to 

rotate the assembled engine by hand with a 1 foot 

long ratchet?

 

Everything seems to rotate easily, ...

 If the spark plugs are out , or the cylinder head is off , and the engine has not been sitting for a long while and things have not gotten stuck or rusty . " everything seems to rotate easily "  is the right answer . 

[Tooljunkie]

Usually a nudge to get it going and should be able to roll it over with 1/2” ratchet. Will have some drag. A worn out lubricated engine will be less tgan a fresh rebuild. 

[lonejacklarry]

I have the same question but I need to know which way to rotate the engine.  Looking at the front of the engine will it be clockwise?  Part 2-Will two complete rotations get it back to where you started?  

 

Thanks.

Edited August 23, 2021 by lonejacklarry

[The Oil Soup]

As I assembled my engine I would rotate it after every part or series of parts were installed using an 18” Crescent wrench to make sure it was not binding. Crankshaft, pistons and con rods etc., also slathering on plenty of assembly lube. Clockwise and yes two revolutions. 

[lonejacklarry]

Thanks very much.  I'm way too old to trust my memory on such things.