QuestionI have a 97 GM 2.4L Quad 4 motor and i am installing new connecting rods and pistons. the connecting rod has an oil hole. Which way does this hole face? Towards the exhaust or intake side of the engine? i forgot since i pulled the old pistons and rods out.
AnswerHi Jeff:
Good question. I don't know. it depends on the rotation of the engine. As long as you still have the rods attached to the pistons youwill be able to tell that way. the pistons have a divot or a knotch on dome "top of the piston" that faces towards the front of the engine. that way you can tell which way they face..
I just looked it up here is the procedure.
Important: Install the piston onto the connecting rod with the arrow oriented toward the front of the engine.
The oil squirt hole at the lower end of the connecting rod must face the exhaust side of the piston.
Assemble the connecting rod and the piston.
Notice: Install the piston pin retainers correctly in the retaining groove during assembly in order to avoid engine damage.
Use the following procedure in order to assemble the piston pin and the retainer:
2.1. Coat the piston pin with oil.
2.2. Install one side of one piston pin retainer into the retaining groove. Rotate the retainer until it is fully seated in the groove.
2.3. Install the connecting rod and the piston pin.
Push the piston pin until the pin bottoms in the previously installed retainer.
2.4. Install the second piston pin retainer.
2.5. Ensure that the piston moves freely.
Notice: Use a piston ring expander to install the piston rings. The rings may be damaged if expanded more than necessary.
Install the following components of the oil control ring assembly (bottom ring):
3.1. The expander
3.2. The lower oil control ring
3.3. The upper oil control ring
Oil control ring gaps should be oriented 180° apart.
Install the lower compression ring (second ring). Place the manufacturer's mark facing up.
Install the upper compression ring (top ring).
