Jeep Engines - Oljeep

360 AMC v-a (CAMSHAFT AND VALVE GEAR) 3995. Install the fuel pump eccentric and distributor drivegear on the camshaft. The fuel pump eccentric has theword REAR stamped on it to indicate the properinstalled position. The camshaft washer fits into therecess in the distributor drive gear. Tighten theretaining bolt to 41 N*m (30 ft-lbs) torque.6. Install a replacement timing case cover gasket.7. Install the timing case cover.8. Install a replacement oil seal. Apply a light film ofengine oil to the lips of the seal.9. Install the vibration damper.10. Install the damper pulley with the retaining bolts.Tighten the bolts to 41 Nm (30 ft-lbs) torque.11. Install the hydraulic valve tappets lubricated with MoparSuper Oil Conditioner, or equivalent. DO NOT drain theMopar Super Oil Conditioner from the engine for atleast 1,609 km (1,000 miles); However, it does not haveto be drained until the next scheduled oil change.12. Install the intake manifold assembly with areplacement gasket.13. Install the pushrods.14. Install the rocker arms and bridge and pivotassemblies. Tighten the capscrews alternately, one turnat a time, to avoid damaging the bridge. Tighten thecapscrews to 26 Nem (19 ft-lbs) torque.15. Reseal and install the cylinder head covers.16. Install the fuel pump.17. Rotate the crankshaft until the No. 1 piston is at theTDC position on the compression stroke. After the No.1 intake valve has closed, TDC can be attained byrotating the crankshaft clockwise as viewed from thefront until the timing mark on the vibration damperaligns with the TDC index on the timing degree scale.18. Install the distributor so that the rotor is aligned with theNo. 1 terminal of the cap when fully seated on the block.19. Install the distributor cap.20. Install the ignition wires.21. If removed, install the air conditioner condenser andreceiver assembly.Caution: Both service valves must be open before theair conditioning system is operated.22. Install the hood latch support bracket and the frontbumper grille, if removed.23. Install the radiator.24. Install the fan and hub assembly.25. Fill the cooling system to the specified level.26. Install and adjust the drive belts to the proper tension.BREAKING CAMSHAFTSUsually, the only reason you break a camshaft is because itgets hit by a connecting rod. You can fail a camshaft bywearing off a lobe, but typically they are still in one piece.However, there is another problem that can cause thecamshaft to break in two and it is not caused by theconnecting rods. One problem is related to valve springs.We have valve springs today that have almost 1,000 Ib. openload! This goes along with the camshaft (or lobes) higher liftwhich makes the base circle smaller. This can cause twopotential problems. The 360 AMC V-8 engine has fivecamshaft journals. There are four lobes between eachjournal. With 16 tappets each with a 1,000 Ib. spring, thetorsional load is extremely high. With the small diameterbase circle, the high torsional load will cause the camshaftto break after the first journal where the load is the highest.Another potential problem is related to the second or fourthjournal. These journals have four lobes on either side whichcould be 4,000 lbs. bending the camshaft across the journal.This causes a bending failure around the second or fourthjournal where the stress is the highest. You could also havea failure caused by a combination of these two situations.The real problem in these cases is the camshaft itself. Highload springs are used to keep down valve float. Valve floatis a problem because the camshafts are too aggressive andhave poor dynamics. On a naturally aspirated engine likePro Stock, these aggressive camshafts can be accepted ifyou can accept the basic parts failures and maintenance. Ina supercharged engine or an engine with nitrous, the falsemotionor camshaft failure will cause a much greater messwith the engine. In these case, a smoother camshaft profile(one that is less aggressive) is the better solution so theblowerhitrous can be used to its full advantage. This willactually make more power and be more reliable.CAMSHAFT BEARINGSThe camshaft is supported by five steel-shelled, Babbitlinedbearings that are pressed in the cylinder block andthen line reamed. The stepped bored camshaft journals arelarger at the front bearing than at the rear to permit easyremoval and installation of the camshaft. The camshaftbearings are pressure lubricated.It is not advisable to attempt to replace camshaft bearingsunless special removal and installation tools are available.Camshaft end play is maintained by the load placed on thecamshaft by the oil pump and distributor drive gear. Thehelical cut of the gear holds the camshaft sprocket thrustface against the cylinder block face. Camshaft end play iszero during engine operation. The rear camshaft bearingjournal has two holes drilled through it to relieve pressurethat could develop between the journal and camshaft plugand force the camshaft forward.