Jump to content


Turning The Engine Over On The Battery

  • Please log in to reply
4 replies to this topic

#1 bdean


    Mini Mad

  • TMF+ Member
  • PipPipPipPip
  • 102 posts
  • Location: Bury St Edmunds

Posted 17 November 2019 - 08:47 AM

I’ve just had my engine rebuilt. It will be a while before I can run it up. I want to fill it with oil and turn it over every now and then. Can I use the battery and jump leads and turn it over on the starter? Do I clamp the negative to the body of the starter and the positive to one of the terminals? Which terminal for the positive?

#2 absx2


    Super Mini Mad

  • Members
  • PipPipPipPipPipPip
  • 548 posts

Posted 17 November 2019 - 10:20 AM

I would guess its not ideal as the best thing you can do with a new engine is run it up properly with a couple of thousand revs to break the cam in followed by driving it down the road. In other words putting a load on it to bed the rings in.

The rebuilt motor would have been put together with assembly lube I hope, particularly the camshaft and the oil pump would have been primed so if it was mine I would squirt some wd40 type stuff down the plug holes and wrap it in a plastic bag and leave it alone.

If you rock the crankshaft 10 degrees each way on occasion it won`t hurt, that way you are not pushing the cam lube away before it`s had the chance to do anything.  

#3 DeadSquare


    Camshaft & Stage Two Head

  • Members
  • PipPipPipPipPipPipPipPip
  • 1,998 posts
  • Location: Herefordshire
  • Local Club: Herefordshire Motor Club

Posted 17 November 2019 - 12:08 PM

When my grandfather laid up his car during the war, Rolls Royce told him to hand crank the engine 180 degrees once a week.

#4 Magneto


    One Carb Or Two?

  • Members
  • PipPipPipPipPipPipPip
  • 765 posts
  • Location: Kansas City, USA
  • Local Club: KC MINI Club

Posted 17 November 2019 - 04:05 PM

Yes, but that wasn't a brand new un-broke-in engine, was it?


I agree, put some motor oil down the bores (not WD-40) and seal off all the openings and put it in a nice tightly sealed bag till you need it.

#5 Curley


    Speeding Along Now

  • TMF+ Member
  • PipPipPipPipPip
  • 378 posts
  • Location: Basingstoke, Hampshire
  • Local Club: Not MINI friendly

Posted 18 November 2019 - 03:03 PM

If you're storing the engine rebuilt I'd keep it in the house & turn it over by hand one a month. 

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

Mini Spares