Use new bolts. Apply a light coating of engine oil to the threads of the new cylinder head bolts. Install the new cylinder head bolts to the cylinder head. Tighten the cylinder head bolts to 40-60 Nm (30-44 lb-ft). The sequence is to start at the middle bolt on the intake side of the head, then move to the exaust side, then move out to the ends of the head in a criss-cross pattern. Loosen all cylinder head bolts approximately two turns, then retighten the cylinder head bolts to 60 Nm (44 lb-ft). After tightening, turn all bolts 90 degrees, in the same sequence. Complete bolt tightening by turning them an additional 90 degrees, in the same sequence.
when refitting a cylander head , there is a proper bolt tightening sequence. this is to ensure the head is pulled down and tightened evenly to prevent warping of the head. by not using proper torgue and sequence, the head is liable to warp, crack or leak. this will then just make you start all over again
CAUTIONTo prevent cylinder head damage, GM recommends the usage of a Remove Cylinder Head Bolt Sequence with a cold engine. For installation, always use NEW cylinder head bolts. TORQUE SPECIFICATIONS:Cylinder Head/Camshaft Carrier Bolt 2.0L:Step 1: Torque all bolts to 18 Ft.Lbs. (24 N.m)Step 2: Tighten 60 DegreesStep 3: Tighten 60 DegreesStep 4: Tighten 60 DegreesStep 5: Tighten 30-50 Degrees
Use the following sequence in order to tighten the cylinder head:Tighten bolt 1 to 63 Nm (46 ft. lbs.).Tighten bolt 2 to 58 Nm (43 ft. lbs.).Tighten bolt 3 to 58 Nm (43 ft. lbs.).Tighten bolt 4 to 63 Nm (46 ft. lbs.).Tighten bolt 5 to 63 Nm (46 ft. lbs.).Tighten bolt 6 to 58 Nm (43 ft. lbs.).Tighten bolt 7 to 58 Nm (43 ft. lbs.).Tighten bolt 8 to 63 Nm (46 ft. lbs.).Tighten bolt 9 to 63 Nm (46 ft. lbs.).Tighten bolt 10 to 58 Nm (43 ft. lbs.).Use J36660-A to tighten all the cylinder head bolts an additional 90 degrees in sequence
The cylinder head bolt torque for a 1999 Chevy Venture is 44 ft lbs. If you have a GM special service tool # J36660A, use that to turn the bolts an additional 95 degrees.
yes!! but you want to look at the head bolts make sure that the head you want to use doesn.t have the lone bolt in the five pattern in the front.
For the 3.9 head bolts (streach bolts) only use new bolts and follow this sequence: Tighten to 20nm in correct sequence. Then tighten each bolt 90 deg turn in correct sequence. Wait 15 minutes. Then tighten each bolt a further 90 deg turn in correct sequence. Done.
Refer to the factory manual for correct sequence. Loosening sequence if different to tightening, and both should be done in steps, not all at once. Lightly oil thread and under head of bolts and torque as instructed in the manual. Use a new head gasket and clean the head and block surfaces. Take care not to scratch or damage the sealing surfaces. Use a torque wrench and the proper 10mm 12 point deep socket.
your head
Directly from the Honda service manual Tighten the cylinder head bolts in two steps. In the first step tighten all bolts, in sequence, to about 29 N-m (3.0 kgf-m, 22 Ibf-ft); in the final step, tighten in the same sequence to 85 N-m (8.7 kgf-m, 63 Ibf-ft). Use a beam-type torque wrench. When using a preset- type torque wrench, be sure to tighten slowly and do not overtighten. If a bolt makes any noise while you are torquing it, loosen the bolt, and retighten it from the 1st step.
Starting from the left hand side on the back of the head 5328 starting from the left hand side on the front of the head 7146 Tighten the cylinder head bolts to 44 ft.lbs (60 N-m) in the order shown in illustration. Use the J 36660-A torque angle meter in order to rotate the cylinder head bolts an additional 95 degrees. Tighten the bolts in sequence to the the specified torque. With all the bolts tightened, make a second pass tightening all the bolts an additional 95°. Remember, 95° is just a little more than a 1/4 turn, not 1/2 turn, or from 12 o'clock to 3 o'clock on the dial. Do not tighten beyond this specification, otherwise the bolts will be overstressed and the gaskets may suffer damage.
Most will, but some 95's use a roller camshaft. Also the cylinder head bolt holes for the intake are different.