Simple Rebuild question.......

[mxp01]

I am rebuilding a 1275 and have reached the point of installing the pistons. Which is the #1 piston? Does it go in the radiator or transmission end?

Thanks,
Mike Pennell

 

[tdskip]

#1 is closest to the radiator, but get someone to confirm this in case the method/reference is different during a rebuild.

Let us know how it comes out Mike.

 

[JPSmit]

always the radiator

 

[startech47]

Remember there is a drivers side and a passengers side to the pistons as well.

 

[JPSmit]

Remember there is a drivers side and a passengers side to the pistons as well.

Don't ask me how I know

 

[jhorton3]

Do you have a Haynes or one of the shop manuals? Also, you're probably going to need a piston ring clamp. You place it around the piston to squeeze the rings in so the piston and rings can be fitted into the cylinder. Watch the bottom of your connecting rods as they go in. You don't want them scratching up your cylinder walls.

 

[mxp01]

Yes, I do have both a Haynes manual and a ring compressor. I just got tripped up a little when the manual directed me to make sure the triangular arrow on the top of the piston is pointed toward the front of the engine. I have new pistons and I really can't distinguish an arrow on these pistons.

Also, since we are discussing the re-build, can someone tell me the p/n and a little bit about the improved rear oil seal for these engines? I bought the standard gaskets kits, but a buddy reminded me about these improved seals that really can cut down on leaking oil.

Mike Pennell

 

[Guest]

Yes, I do have both a Haynes manual and a ring compressor. I just got tripped up a little when the manual directed me to make sure the triangular arrow on the top of the piston is pointed toward the front of the engine. I have new pistons and I really can't distinguish an arrow on these pistons.


Mike Pennell

usually stampped on top, but might be underneath or on side by pin bore. Sometimes overbore number (.020, .030, etc..) may be used as "front" mark IIRC. This going by several different manufacturers. Your results may vary.

When in doubt, call manufacturer or supplier.