Subaru 12108AA730 Bearing Set Connecting Rod

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To begin with, use a feeler gauge to check the endplay (side clearance) before removing the connecting rods from the crankshaft. For each connecting rod, put the feeler gauge between the first connecting rod and the crankshaft throw until it stops moving. For each rod, repeat this procedure. The endplay is equal to that of the feeler gauge(s). Check out an automotive machine shop for limits of endplay service. In case play exceeds service limit new connecting rods are needed. If new rods (or a new crankshaft) are fitted, then minimum allowable limits may be violated. To attain this, rods should be machined. In case you find it necessary consult an automotive machine shop on this matter. Carefully mark the connecting rods and caps if they are not numbered so that they can be reinstalled in their same positions on their same journals of a crankshaft as marked here below: one dot at front for cap nuts or bolts on one journal loosened in three steps; two dots for second ones; three dots for third ones and so on attached to them with cap nuts or bolts removed in three steps or loosened with 3-step removal of either cap nuts or bolts off it by using which other methods were used such as marking both number of holes present in these parts' flanges against number oil hole openings just after making sure that there is no oil coming into them from through clean up twice etc since there will be any confusion about whether they belong together later by soaking them all again over night once more but before carefully picking up besides wiping solvent later followed through complete removal hence drying thoroughly like newly bought items although during processing where there was also application clear earlier foregoing parting lines being taken away now finally while restating what was given above only excepting important details like differences mentioned herein starting another paragraph but without disregarding last words above yet reducing length nevertheless While doing this job happens ensure that bottom end of crankshaft is not marked by any other bolt. Clean the parts with solvent but do not mix them up and thoroughly dry. Ensure that oil holes are not clogged.

Before removing the connecting rods from the crankshaft, turn the engine with the feeler gauge, and observe the end play (side clearance, connecting rod to crankshaft throw) then do the same for the other rods also. The end play is equal to the thickness of the feeler gauge(s), it is recommended to consult an automotive machine shop for end play service limit which generally ranges from to .050 to .015" (0.127 to 0.369 mm). Past this range, new connecting rods will be required in the play of the drill string. In some instances, new rods or a new crankshaft might be inserted, and the resultant end clearance is located below the postoperatively minimum standard; hence, some machining of the rods or seeking advice with an automotive machine shop. If the rods and caps are not numbered, then try to number them in order that they could be refitted between the related cylinder and crankshaft journal, the usage of permanent ink or paint layer. With the crankshaft facing up, place one dot at the connecting rod and cap at the front of the crankshaft, mark the second one with two dots, and so on, both the rods and caps should be marked since they will needs to be separated later. After loosening the cap nuts/bolts a little more on one connecting rod, detach the cap and the bearing insert with a little more care and then pull out the connecting rod and the remainder of the bearing insert from the crankshaft journal; however it's beneficial to clamp the connecting rod along with the bearing and the cap in a way that the parts don't get mixed up. Perform this process to the other connecting rods, being very cautious not to damage the crankshaft journals with the bolts. Last, wash with solvent not intermingling the parts, then dry until they are thoroughly dry, especially the oil holes.

Loosen the cap nuts or bolts in three steps, carefully lift off the cap and bearing insert, then remove the connecting rod and remaining bearing insert from the crankshaft journal. Temporarily reassemble the connecting rod, the bearing, and the cap to prevent mixing up parts.

After the connecting rods have been installed, rotate them by hand and check for any obvious binding.

Ensure that the bearing faces and backs are perfectly clean. Fit the bearings to the connecting rod and cap, making sure the tab on each bearing is engaged in the recess in the cap or connecting rod.

If new bearings are being used, check the oil clearances before final installation of the connecting rods. If the clearances are within the specified limits, proceed with the installation. Never assume that the clearances are correct even though new bearings are involved.

If the rods and caps are not numbered, you should carefully mark the connecting rods and caps so that they can be reinstalled in the same position on the same crankshaft journal. One common method is to mark the connecting rod and cap at the front of the crankshaft with one dot, the second connecting rod and cap with two dots, and so on.

Ensure that the bearing faces and backs are perfectly clean. Fit the bearings to the connecting rod and cap, making sure the tab on each bearing is engaged in the recess in the cap or connecting rod.