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You are watching: Jeep 3.7 head bolt torque specs


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Hope this helps.Head layout red O = cylinder.Bolts 1 with 8 call for clean oil included to threads.* calls for sealant included to threads.Left financial institution shown, right financial institution is a mirror image.Head bolts; talk in succession 1,2,3,4,5,6,7,8, 9*,10*,11*,12*Torque making use of the adhering to steps:First step; speak bolts 1-8, to 20 ft. Lbs.Double examine all bolts 1-8 room still at 20 ft. Lbs.Torque bolts 9-12 come 10 ft. Lbs.Second step; revolve bolts 1-8, 90°.Third step; rotate bolts 1-8, 90° again. Torque bolts 9-12 to 19 ft. Lbs.-----11*----9*-----10**,,,|¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯|7..|_______.| 5----12*,,,|___O__._|3..|______...| 1 ,,,|___O__._|2..|_______.| 4 ,,,|___O__._|6..|________| 8
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Hope this helps.Head layout red O
= cylinder.

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Bolts 1 v 8 call for clean oil added to threads.* needs sealant added to threads.Left financial institution shown, right bank is a winter image.Head bolts; speak in succession 1,2,3,4,5,6,7,8, 9*,10*,11*,12*Torque using the following steps:First step; speak bolts 1-8, to 20 ft. Lbs.Double check all bolts 1-8 room still at 20 ft. Lbs.Torque bolts 9-12 to 10 ft. Lbs.Second step; revolve bolts 1-8, 90°.Third step; turn bolts 1-8, 90° again. Speak bolts 9-12 come 19 ft. Lbs.-----11*----9*-----10**,,,|¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯|7..|_______.| 5----12*,,,|___O__._|3..|______...| 1,,,|___O__._|2..|_______.| 4,,,|___O__._|6..|________| 8
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Intake, speak in succession 1,2,3,4,5,6,7,8 come 105 in. Lbs.Right front come rear. 5,1,3,7Left front come rear. 6,2,4,8Exhaust; If the studs come out when removing, you have to replace the studs with new. You will require to add sealer top top the outlet threads the the brand-new studs.Start in ~ the center arm and working out. Torque to 18 ft. Lbs.Exhaust pipe to manifold 25 ft. Lbs.Both sides space the same.
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Seeing an excellent info in this thread, ThanksHere"s mine story then the question.I to be told the after a leak down test that i had poor cylinder head gaskets. Traction the heads and also gaskets looked fine additionally noticed that cylinder 3 exhaust valve wasn"t moving and also sealing like it have to which is the very same cylinder that is giving an engine code. Not prepared to replace the left head I put the engine ago together with brand-new gaskets and new head bolts. Throughout the torque sequence (20lbs, examine 20lbs, 90deg, then another 90deg), specifically during the second sequence of 90deg turns, a pair of bolts (at about an 1/8 turn) every one of sudden got easier to turn; I would certainly say a palliation of about 40lbs of initiative to revolve the bolt. All other bolts maintained a constant level the torqueing effort to finish the last 90degs. Have actually you knowledgeable such a thing? Am i Screwed? did I just over big the bolt or possibly strip threads? I"ve pulled and also installed a couple of heads in my house garage mechanics carrier however I"ve never ever experienced this before. I since have started the engine and also it started appropriate up; operation the same as that did before and also still obtaining the cylinder 3 engine code. I have actually not run the engine since, trying to decision what to carry out next. Hoping to just replace head bolts and left cylinder head.Would evaluate any and also all comments and also feedback