Eagle Rod Question

[rconlon67]

I am installing a set of eagle rods. In the haynes manual it notes to put side of the rod with a "mark" on it towards the front. On one side of the rods there are numbers and on the other side there is a picture of an eagle.

1)Does it matter which side goes wich way?

2)wich side should go towards the front, the eagle side or the number side?

Thanks for the info,
Ryan

 

[jeremy19984g63]

On each rod there are two notches on the inside where the bearings go. One on the rod and one on the cap. These notches are there to help hold the bearings in place. look at each rod and make sure that you put the notches toward the front of the engine. Another way to say it is, put the notch side on the upstroke side of the engine.

 

[gsx951]

Assemble the caps to the rods so that the numbers line up.

I just searched both the factory service manual and factory overhaul manual and found nothing on orientation of the rod. The notches for the bearing retainer tab go together but there is no mention that the tabs need to face any particular way.

http://www.ecanfix.com/users/manualcd/gift/dsm/1g-90-92-4g63overhaul.pdf

 

[jeremy19984g63]

Trust me, the direction of the notches are important! Inspect the stock rods and you will find that they all are on the same side. Facing the front of the engine, upstroke side. THis is coming from a good friend that owns a machine shop!

 

[Wizard]

He is also using new aftermarket eagle rods....not stockers. I would contact Eagle to be certain which direction, if any, is required.

Wiz

 

[jeremy19984g63]

Eagle rods are designed to use stock first gen rod bearings, so the direction will still be the same.

Let me add, that all engine manufactures are different. So when doing a rebuild on different breeds, a close inspection of part direction is very importants during disassembly. A paint pen works good for marking parts too.

 

[rconlon67]

1) The notches in the rods where the bearings go, do not face front to rear(front=timing belt side, rear=flywheel side), but as you mentioned upstroke side, you mean like the intake manifold side?

2)I sent eagle an email, I'll post up what they say if they reply, if not I'll give them a call after work.

Thanks for all of the info guys. Appreciated.

~Ryan

Assemble the caps to the rods so that the numbers line up.

I just searched both the factory service manual and factory overhaul manual and found nothing on orientation of the rod. The notches for the bearing retainer tab go together but there is no mention that the tabs need to face any particular way.

http://www.ecanfix.com/users/manualcd/gift/dsm/1g-90-92-4g63overhaul.pdf

Yea,
I looked through that same PDF also, couldn't find anything either. Thanks for the input tho.

 

[jeremy19984g63]

I know front is crank pulley side and rear is flywheel side, but I was trying to point it out to you as if it was sitting in the car. (turbo side)

If you have the old rods and pistons out then look at them. See the arrow on top of the piston it goes to the crank pulley side of the engine (the real front). Ok look at the way the rods are put on the pistons. Look at the direction the notches are related to the direction the piston goes

 

[Big Woo]

The direction is specified in the Haynes manual. The numbered side is toward the back of the engine or the Intake side ( meaning the side the intake manifold bolts to). The bearing locks go toward the front or the exhaust side (meaning the side the exhaust manifold bolts too).

You will notice a mark on your stock rods in the middle of the beam area near the big end that is on one side but not the other. This mark aligns with the mark on the piston and they are to face the front of the engine.

Some food for thought here.
In reality on a 4G63 with aftermarket rods the direction does not matter, since none of the aftermarket rods I have seen employ oil squirters within the rod beam like the stock ones do. For example: On a inline engine with one connecting rod per crankshaft throw, both side of the rod and bearing are limited by the rod thrust surfaces, and the crank journal radius's are the same on both sides. Additionally the rods are symetrical in that the pin boss, beam, and big end all share a common centerline. Therefore one can install the rod in either direction without problem.

This is differnt than "V" or flat style engines, and engines where multipal rods share a common crank journal. In these appilcations one will notice that the big end of the rod is often offset from the pin and beam when viewed along its edge. Additionally the rods only face the crank on one side, and another rod on the other. in these cases rod direction is very critical, since it can lead to the wrist pin being offset in relation to the piston pin bosses. It can also lead to clearance problems with regard to interfearence with the crank journal radius and the rod.

In short the best option is to follow the manual and reassemble it accordingly.

 

[rconlon67]

If you have the old rods and pistons out then look at them. See the arrow on top of the piston it goes to the crank pulley side of the engine (the real front). Ok look at the way the rods are put on the pistons. Look at the direction the notches are related to the direction the piston goes

Good thinking, creative..

The direction is specified in the Haynes manual. The numbered side is toward the back of the engine or the Intake side ( meaning the side the intake manifold bolts to). The bearing locks go toward the front or the exhaust side (meaning the side the exhaust manifold bolts too).

I must have missed that in the manual.

You will notice a mark on your stock rods in the middle of the beam area near the big end that is on one side but not the other. This mark aligns with the mark on the piston and they are to face the front of the engine.

Some food for thought here.
In reality on a 4G63 with aftermarket rods the direction does not matter, since none of the aftermarket rods I have seen employ oil squirters within the rod beam like the stock ones do. For example: On a inline engine with one connecting rod per crankshaft throw, both side of the rod and bearing are limited by the rod thrust surfaces, and the crank journal radius's are the same on both sides. Additionally the rods are symetrical in that the pin boss, beam, and big end all share a common centerline. Therefore one can install the rod in either direction without problem.

This is differnt than "V" or flat style engines, and engines where multipal rods share a common crank journal. In these appilcations one will notice that the big end of the rod is often offset from the pin and beam when viewed along its edge. Additionally the rods only face the crank on one side, and another rod on the other. in these cases rod direction is very critical, since it can lead to the wrist pin being offset in relation to the piston pin bosses. It can also lead to clearance problems with regard to interfearence with the crank journal radius and the rod.

In short the best option is to follow the manual and reassemble it accordingly.

Makes sense, I was wondering about this, as I couldn't seem to see any difference in the rods orientation.

Thanks everyone,
Ryan