Long, Short. Closed, Open. ?

[Phizinza]

Hey, haven't posted in a while but I would just like to know what the differences, advantages, disadvantages and so on are of these Long Blocks, Short Blocks. And Closed/Open Blocks I keep hearing about. Mainly just want to know about the differences.

I saw on a different site that it was possible to put a EA81 long block on a EA82. What I know of what people call "Blocks" is the bit below the head (or inbetween, on subies.) How could you put a EA81 part like this on a EA82? Just wondering.

Thanks.

[TomRhere]

One can put an EA-81 engine into an EA-82 body and vice-versa. As far as parts swap between the two engines, one is limited to the intake manifold and disty with some re-work involved. The Y-pipe from the EA-82 will fit the EA-81, but one would have to use a spacer to put the EA-81 pipe on an EA-82, as the EA-81 has a piece between head and pipe for the ASV stuff and the EA-82 is plumbed right into the head.

 

Short block; basically just block, pistons & rods, crank, may/may not include cam(EA-81) or oil pan. No oil pump, water pump, heads.

 

Long block; complete engine, usually minus intake manifold. May not have valve covers or oil pan.

 

This would depend on who is selling it, places vary. Also depends on what make of engine, Subaru, Dodge, Nissan, yada yada yada.

 

Open-closed deck; this refers to how the block was cast around the cylinders for the cooling jacket. The deck area is where the head bolts on.

On a closed deck one would see small opening for the water to circulate thru(webbing) into the head, this ties the cylinder to the main body of the block.

On an open deck, the top of the cylinder wall is basically wide open, no webbing of the metal to the main body of the block. Think of a circle within a circle and you'd get the basic picture. This is not a real good design as it allows for some "walking around" of the cylinder, not good for head gaskets. Subaru made one of these, but I'm not sure what one it is.

[Phizinza]

One can put an EA-81 engine into an EA-82 body and vice-versa. As far as parts swap between the two engines, one is limited to the intake manifold and disty with some re-work involved. The Y-pipe from the EA-82 will fit the EA-81, but one would have to use a spacer to put the EA-81 pipe on an EA-82, as the EA-81 has a piece between head and pipe for the ASV stuff and the EA-82 is plumbed right into the head.

Thats what I thought. Just sounds impossible to swap parts from a OHV engine and a OHC engine...

 

Short block; basically just block, pistons & rods, crank, may/may not include cam(EA-81) or oil pan. No oil pump, water pump, heads.

 

Long block; complete engine, usually minus intake manifold. May not have valve covers or oil pan.

 

This would depend on who is selling it, places vary. Also depends on what make of engine, Subaru, Dodge, Nissan, yada yada yada.

Wow, didn't expect that answer. Alrighty, so its all just about what parts of

the engine you have or are getting.

 

Open-closed deck; this refers to how the block was cast around the cylinders for the cooling jacket. The deck area is where the head bolts on.

On a closed deck one would see small opening for the water to circulate thru(webbing) into the head, this ties the cylinder to the main body of the block.

On an open deck, the top of the cylinder wall is basically wide open, no webbing of the metal to the main body of the block. Think of a circle within a circle and you'd get the basic picture. This is not a real good design as it allows for some "walking around" of the cylinder, not good for head gaskets. Subaru made one of these, but I'm not sure what one it is.

Right... All just about how the blocks coolent jacket is connected to the heads coolent jacket.

 

Thank you. That all made sence. Now I can start to understand all this weird talk a bit more.

Cheers mate.