Friday, 8 April 2011

Daimler Sleeve Valve Photos

Some further work on the latest Daimler Sleeve Valve engine. 
Having removed various fittings, the sump has been lowered to assess piston removal.
The previous engine would allow the pistons and rods to withdraw downwards past the crank. Unfortunately this slightly later engine has an oil deflection tray which does not allow access to lower the pistons. To remove the tray, the block has to be removed, followed by the the sleeves (these require the removal of a pin from the little con rods, this pin is held by a very fiddly taper pin, as on the previous early engine). Once the sleeves are withdrawn up and away from the piston, the tray can be removed and the piston rod assy can be withdrawn. Contrary to normal practice the sleeves must not be cleaned more than the absolute minimum as the grooves machined into the sleeves deliberately promote natural carbon build up to form a "natural " seal.


  1. I didn't know natural carbon buildup was used to form a seal... I always wondered how much more compression you actually get from carbon buildup in a motor when you run high test gas, but I didn't know it was used for actual engine performance.

    Behind Bars - Motorcycles and Life

  2. Yes it is quite interesting, looking at it I think there is quite a sealing potential, they were trying all ways to reduce oil burning, I guess it seals against this too.
    Best wishes.

  3. I have a circa 1920 chassis that lost its sleeve-valve engine 60 years ago... this engine looks perfect for my project, so if it is an orphan and doesn't belong to an existing car, would it be possible to beg/borrow/part-exchange/trade it or even purchase with lotsa hard-earned banknotes?