What is this engine?

I have been offered an engine for sale.

It is a 4 cylinder with the cylinders cast in pairs. I am told it may be a Liberty engine(?) but the only references to Liberty cars I can find mention only 6 cylinder engines being used. The block is around 34" long.

It is either an english or american engine as all bolts are imperial and not metric sizes.

Any help to identify the age and make of this unit would be appreciated!

May be a truck item, any makers logos around the parts numbers, if there are any?

Unfortunately, all I have is pictures so I cannot tell if there are any logos or parts numbers.

At first look I thought the engine seemed as if it was from the 1920's, but the cylinders cast in pairs seems to suggest an earlier date of manufacture?

Like Bob says, it looks very truck. In any case, you can only blind guess unless you know bore and stroke. If you take the sump off you would be able to measure bore with old style callipers, and get the stroke near enough as twice the crank throw length. Then, if you look at the truck section of Floyd Clymer's year books, it may spring out at you. Some English trucks had 4 cyl detacheable head side valve engines in the 1920's also.

Ivan Saxton

Looks like a Mack Truck to me. Early 20s AB?

Dave

It seems to me that the heads are aluminum on the AB Mack. Not sure if they also made some from cast? Dave!