Post by justyfied on Apr 2, 2012 17:30:46 GMT -4
This is a guide to show the difference's in the Justy Cylinder Heads.
There are 2 different EF12 cylinder Heads. They both have 3 valves per cylinder. There are coolant passages from the head into the intake on the carb version. The EFI version does not have these passages and the intakes will not work on the opposite heads. However the head and intake can be swapped onto not only the EF12 but the 2 valve EF10 carb equipped engine block as well. Because of a difference in the height of the camshaft mounting the drive belt will even work.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/EF-12eIntakePortsns.jpg
This is the EF12 Carburetor head intake side without and intake manifold bolted on.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/combustionchamber-1.jpg
EF12 carb head from the chamber side
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/hlavaef12chamberssafe.jpg
EF12 EFI head from the chamber side.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/2valvehead1safe.jpg
EF10 2 valve head from the chamber side.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/2valveheadsafe.jpg
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/ef102valvebadshah.jpg
EF10 from the valve cover side.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/pistonsrodsheadchamberside.jpg
Hard to see pic of the 2 cylinder REX 2 valve head from the chamber side.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/Rex91-1.jpg
And from the valvecover side, does that look familiar?
There are 2 different EF12 cylinder Heads. They both have 3 valves per cylinder. There are coolant passages from the head into the intake on the carb version. The EFI version does not have these passages and the intakes will not work on the opposite heads. However the head and intake can be swapped onto not only the EF12 but the 2 valve EF10 carb equipped engine block as well. Because of a difference in the height of the camshaft mounting the drive belt will even work.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/EF-12eIntakePortsns.jpg
This is the EF12 Carburetor head intake side without and intake manifold bolted on.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/combustionchamber-1.jpg
EF12 carb head from the chamber side
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/hlavaef12chamberssafe.jpg
EF12 EFI head from the chamber side.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/2valvehead1safe.jpg
EF10 2 valve head from the chamber side.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/2valveheadsafe.jpg
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/ef102valvebadshah.jpg
EF10 from the valve cover side.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/pistonsrodsheadchamberside.jpg
Hard to see pic of the 2 cylinder REX 2 valve head from the chamber side.
i567.photobucket.com/albums/ss118/justyfied/justy%20pics/rex%20sherpa%20mini%20jumbo/engines/Rex91-1.jpg
And from the valvecover side, does that look familiar?