Tutorial: crankshaft spi seal flywheel side (Peugeot 306 1.9L D – XUD engine)

If you have an oil leak that appears to come from your flywheel, it can come from your crankshaft oil seal on the side of flywheel engine/gearbox. The crankshaft oil seal on crankshaft pulley side is systematically changed when timing belt is changed. On the other hand the spy seal gearbox side is usually changed when one realizes that it is leaking. More as this leak is located on the engine flywheel, rotating continuously, it projects the oil on all the engine. If you don't inspect regularly you engine, you will discover an engine covered with oil. The source of the leak is then difficult to determine.

Access to the flywheel

To access the flywheel you will need to file the gearbox and clutch. To remove these 2 elements you can follow the removal in the previous tutorials change the gearbox and change the clutch. These tutorials also concern the Peugeot 306 1.9L D. You will see that the most difficult is not to change the seal but access its.

Remove the flywheel

To remove the flywheel, remove its fixing screws in the center of the wheel. If the flywheel is stuck, tap a little on to unlock. Be careful not to injure yourself with the flywheel. It is extremely heavy and crown teeth are very sharp and perfect for cut fingers. So take gloves. If it escapes you, pull you without trying to catch him.

If you do not see stop positioning on the flywheel, make a mark to identify its position. The flywheel can be screwed only in a way so that the notch in the Top Dead Center sensor is always well positioned. Indeed, the screws of the flywheel are not prepared at regular intervals.

If your oil seal leaking well, you can see the oil on the tour of the seal leak. This oil seal is large diameter (110mm). To verify that your new gasket dimensions are correct, remember to compare them with those listed on the old gasket. So take care not to destroy these inscriptions during removal.

Change the crankshaft spy seal on gearbox side

• Remove the crankshaft oil seal with a screwdriver or with 2 small screws inside.
• Clean the oil seal with a cloth
• Place the new oil seal by tapping gently with a large hammer. Make sure that the oil seal lips do not overlap the shelf of the crankshaft or engine block. This is quite common for seals spy of this size.
• The plate of the crankshaft exceeds about 1 mm from the engine block. It is therefore necessary to insert the oil seal a little farther than the plate of the crankshaft.
• To do this, place a small hammer flat on the oil seal by wearing this hammer on the engine block. Then carefully tap a small hammer with a large hammer to return about 1 mm additional seal spy on the crankshaft.

Verification of the flywheel

Take advantage of the removal of flywheel to clean it with fine sandpaper. Clean the axis hole to facilitate the remount on the crankshaft.

If you change the flywheel of the engine, check that the number of teeth of the Crown of the steering wheel is the same on the old and the new steering wheel. For this, place the 2 flywheels, back to back, one against the other. Their teeth must match. If teeth do not match, then lay the wreath of the old flywheel and mount it on the new. You'll probably need to heat the crown to unset it. The tooth count fixes their size, this one must match the starter tooth size.

Remount the flywheel

• Position the flywheel on the crankshaft plate token.
• Reenter it on the crankshaft
• Set screws and tighten them.

Remount the other parts

To remount the clutch and the gearbox, follow these 2 tutorials change the gearbox and change the clutch.

Conclusion

You can see that it is a leak that can cost you a lot in labor! Indeed, removal/reassembly of the gearbox and clutch of require a good day's work.