Piston and rod installation

[BayState300GT]

So i ordered a set of wiesco pistons, .20 over and eagle esp h beam rods. I know that pistons and rods usually have a specific cylinder they go in, and i was wondering if there is any way to tell which ones go in which cylinder. There is nothing in the directions about which cylinders they go in so if anybody has done this before could you please help me! thanks

 

[eagle_talon90]

If you have new pistons and rods, I'm pretty sure it doesn't matter which cylinder they go in. It's only if you are reusing old pistons and rods that are still in spec you need to make sure they go in the same cylinder they came out of because of wear patterns and what not.

 

[kp116]

You did get machining done for the aftermarket pistons correct? The cylinder shouldn't matter but they do go in a certain way. You can however use a micrometer and a cylinder bore gauge and measure each cylinder and piston to see which ones would fit with the least tolerance in which cylinder. Have you ever plastigauged before? You SHOULD do that to each main and rod bearing journals to check the oil clearances.

 

[EclipticalGS]

. Its new hardware, either way the pistons will come the same size and a certain piston will not have to go in a certain cylinder, if you did it like me and just tore the head off and and your just pushing the pistons and rods out through the top, make sure you hone the crap out of those cylinders until your arms get tired. Then plastigauge to spec. They are pretty cheap, but get the wall clearances, and hone to spec, unless you got oversized stuff, in which this case you do, in that case the block may be need of boring, and might as well get your crank polished, but if your doing it with motor intact, i personally have hones .20 over with a flex hone, and degalzing. But you will have sore arms for the majority of your time after

 

[BayState300GT]

ive already had the machine work done, thanks guys I had it bored, honed, hotanked, polished and balanced cranks, align honed etc. But one more question, the small "hole" on the top of the piston, i know it means which direction the piston faces in and i was always told it was to face twords the flywheel but today i heard that if faces twords the timing belt which is correct?

 

[anteversion]

it should be pointing the timing belt side