OEM Jeep Patriot Crankshaft

Jeep Patriot Crankshaft Parts and Q&A

• Crankshaft
  68001694AC
  Q: How to Extract the Crankshaft from the Engine Assembly on Jeep Patriot?

  A:

  Before removing the crankshaft, take the engine out of the vehicle and then take off the transaxle. After that, take out the flex plate/flywheel and the crankshaft rear oil seal (1). Then, separate the engine from the lift chain (1) and set it on an appropriate repair stand. Unscrew and drain the engine oil and unscrew and remove the Oil Filter. After removing (1), the Oil Pan and (2) the engine mount support bracket, next stop are the vibration damper (2) and the water pump pulley (3). After that, take off the timing chain cover and remove the timing chain as well. After removing the engine, lift out the balance shaft module and the crankshaft sprocket (1). To detach the crankshaft position sensor, release the bolt on its retaining plate (1) and the sensor (2), then set aside the ladder frame. Whenever piston or connecting rod replacement is required, the cylinder head must come off. Never place a number stamp or punch on the connecting rods so you don't damage them. A permanent ink or paint marker should be used to label the cylinder number on every connecting rod and cap. Take out all the connecting rod bolts and caps, keeping in mind not to harm the fracture rod and cap and never use the same connecting rod bolts ever again. Gently lift the crankshaft out of the cylinder block after removing the main bearing caps and avoiding any harm to the main bearings or journals.
• Crankshaft
  68001693AC
  Q: What Are the Steps Involved in Installing a Crankshaft on Jeep Patriot?

  A:

  Main bearings for the crankshaft make five contacts, with all shells in the upper end of the crankcase having oil grooves and holes, while the lower end's shells are ungrooved. End play in the crankshaft is controlled by a two-piece thrust bearing fitted to the number three main journal. It's important to first clean the main bearing cap hole with the specified brake parts cleaner and blow out the holes with compressed air. Slide the upper bearing shells toward the oiling area in the block so that the oil holes and groove in each piece fit into the engine's oil holes correctly. When a crankshaft is sent for machine work, be sure it is balanced with the target ring attached. Mopar brake parts cleaner should be used to wash down the crankshaft and target ring which should then be dried with compressed air to get rid of oil and dust. Novak recommends swapping the mounting screws of the new ring and starting with the hardest, at location #1, as you tighten the screws to 13 Nm (110 in-lbs). Gently spread trans gel onto the thrust bearings, being careful they are positioned so the notches are facing the crankshaft while being installed. Carefully add the thrust bearings to the block and make sure the oil from your hand does not touch the ladder frame, since this will cause trouble with your RTV seal. Make sure to oil the bearings and journals before you put the crankshaft into the engine. Put the lower main bearings in the cap, so the tabs are seated properly and install the caps onto the engine block, first threading the bolts by hand but not tightening them too much. Line up the thrust bearing by rotating the crankshaft to TDC at number 4, moving it rearward until you reach its limit, moving it to its front limit and wedging a tool between the crankshaft counterweight and the rear of the cylinder block to keep it in the forward spot. Be sure to identify the bolt heads to find out the correct torque level for each set of main bolts, as every set calls for a particular value. When the bolt heads are correct for each machined hole as needed, begin with tightening to 15 Newton meters (11 foot pounds). Then, tighten the head again to 27 Newton meters (20 foot pounds). Finally, rotate the bolts another 45 degrees. If you find that the bolt heads do not join, tighten them up to 15 Nm, then up to 45 Nm and turn them another 45° as well. Take out the wedge tool and measure the crankshaft turning torque which needs to be under 5.6 Nm (50 in. lbs.) and check the crankshaft end play. Add the connecting Rod Bearings and caps and fit new bolts instead of using those that were formerly on the rods, tightening them to 20 Nm + 90° (15 ft. lbs.) + 90°. Assemble the ladder frame assembly, place the balance shaft module and fit the crankshaft position sensor after securing them all with a bolt. Once the cylinder head is off, put it back in and next, put on the front crankshaft sprocket, timing chain, timing chain front cover and Oil Pan. Slide in the rear and front crankshaft oil seals, the engine mount support bracket and the crankshaft vibration damper. Put in the water pump pulley, take away the engine from the stand and secure the engine lift chain. Insert the crankshaft rear oil seal and the drive plate/flex plate and install new bolts, tightening all to 95 Nm (70 ft. lbs.). Bolt the transaxle to the engine, using 101 Nm (75 ft. lbs.) of torque on each of the bellhousing bolts and then fit the engine assembly. Then, change the Oil Filter, top up with oil and coolant, check for leaks and place the engine cover.