For all non stroker / performance related problems and discussion. Show shockcocker04Making Progress  Head torque SequenceDoes anyone have a torque diagram for a 2001 4.0 cylinder head? I know there is a couple different steps, also the placing for the head bolts by number. Thank you, Bryan Re: Head torque SequencePost by Muad'Dib » March 16th, 2009, 9:11 am
If it feels right, then STROKE it!
BodoDonator Re: Head torque SequencePost by Bodo » March 17th, 2009, 7:08 am Along the same lines I didn't pay much attention to the headbolts when I tore my donor engine down. I did notice that the new headbolts have 2 or 3 different kinds of bolts (lengths and styles). Is there a cheat sheet to show which kind if bolt goes where? Re: Head torque SequencePost by SilverXJ » March 17th, 2009, 7:42 am The longer ones with the stud ends go outside the valve cover. Using the image above that would be 14, 10, 6, 2, 3, 7, 11. The shorter ones with the dowel pins on the head for the valve cover gasket go to 8 and 9 IIRC. Check your valve cover gasket to be sure, if it is of that type. Fill the remaining holes with the short ones with the regular head. Who is onlineUsers browsing this forum: No registered users and 0 guests
Creatas/Creatas/Getty Images The 1998 Jeep Cherokee was available with a 6-cylinder 4.0 liter engine. As with all engines, rebuilding the 4.0 liter requires careful attention to detail. One of the most important and commonly overlooked details is the engine's torque specifications. Tightening a bolt too much can damage the component it is designed to secure, and may even break the bolt off inside of the engine block. Failure to the tighten the bolts enough can cause them to come loose and cause severe engine damage. Use a torque wrench and follow the specifications to tighten the bolts to their proper settings. Combination ManifoldUnlike most engines, which feature an intake manifold and an exhaust manifold as separate components, the 4.0 liter engine uses a combination manifold that is removed and installed as a single component. The torque specification varies depending on the location of the manifold's bolt. Tighten the bolt at each end of the manifold to 17 ft-lb. of torque. Tighten the remaining bolts to 23 ft-lb. of torque. Cylinder HeadThe head bolts must be tightened in a particular sequence. Tighten each head bolt to 22 ft-lb. of torque, then tighten all bolts to 45 ft-lb. of torque. Tighten all of the bolts a third time to their final torque setting of 110 ft-lb. BearingsTighten the crankshaft's bearing caps to 80 ft-lb. of torque. Tighten the rod bearing caps to 100 in-lb. of torque. Harmonic BalancerTighten the harmonic balancer bolt to 80 ft-lb. of torque. Crankshaft PulleyTighten the crankshaft pulley's retaining bolts to 20 ft-lb. of torque. Rocker Arm ShaftsTighten each of the rocker arm shaft's bolts to 19 ft-lb. of torque. References
Writer Bio John Stevens has been a writer for various websites since 2008. He holds an Associate of Science in administration of justice from Riverside Community College, a Bachelor of Arts in criminal justice from California State University, San Bernardino, and a Juris Doctor from Whittier Law School. Stevens is a lawyer and licensed real-estate broker. More Articles |
Jeep 4.0 head torque specs
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