Head bolts torque sequence?

BRADEN MILTON MOYA

MEMBER
2007 DODGE DURANGO
4.7L
V8
4WD
AUTOMATIC
225,000 MILES

My Haynes manual says to tighten the head bolts in sequence to 20 ft lbs. Then to recheck in sequence to 20 ft lbs. After that it says Torque to angle
additional 90 degrees. Then the last step says Torque to angle 90 degrees again. So, I'm left wondering if that makes 180-degree total? I want to get clarification because I don't want to over torque the bolts and risk them snapping.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
47,643 POSTS

That looks right here are the instructions they give us from AllData.

3. Position the cylinder head onto the cylinder block. Make sure the cylinder head seats fully over the locating dowels.

NOTE: The four M8 cylinder head mounting bolts (11-14) require sealant to be added to them before installing. Failure to do so may cause leaks.

4. Lubricate the cylinder head bolt threads with clean engine oil and install the ten M10 bolts.
5. Coat the four M8 cylinder head bolts with Mopar (R) Thread Sealant with PTFE then install the bolts.

NOTE: The cylinder head bolts are tightened using an angle torque procedure.

6. Tighten the bolts in sequence using the following steps and torque values:

1. Tighten bolts 1 - 10 to 27 Nm (20 ft. Lbs.).
2. Verify that bolts 1 - 10 have all reached 27 Nm (20 ft. Lbs.), By repeating step 1 without loosening the bolts.
3. Tighten bolts 11 - 14 to 14 Nm (89 in. Lbs.).
4. Rotate bolts 1 - 10 an additional 90 Deg.
5. Rotate bolts 1 - 10 an additional 90 Deg. Again.
6. Tighten bolts 11 - 14 to 26 Nm (19 ft. Lbs.).

I have also included more instructions and how to tighten the head bolts in the images below. Check out the images (below). Please let us know if you need anything else to get the problem fixed.

Images (Click to make bigger)