1995-1998 GM 4.3        Cylinder head & intake manifold

Cylinder Head    #1 use sealer on head bolts

           #2 in sequence torque all bolts to 22 ft-lbs

           #3 For the rest of this procedure you need a device to measure degrees.

                I would suggest marking each bolt immediately after final torque.

                     bolt#             degrees
                           1                    75
                           2                    55
                           3                    55
                           4                    75
                           5                    75
                           6                    55
                           7                    55
                           8                    75
                           9                    75
                          10                   55
                          11                   55
                          12                   65
                          13                   65
                     

Sequence                                   8                  5                  9

front                  12                 4                  1                 13

                           11        7        3        2        6        10




1995 Intake procedure; The following two steps.


Step one 35 ft-lbs           12     5        4     2        7     10



                             11     6      1      3          8   9    




Step two                            Torque all bolts to 35 ft-lbs again, then bolt #9 to 41 ft-lbs      



1996-1998 Lower Intake manifold procedure
#1install gasket with blocking plates toward rear
#2 Apply RTV end seals
#3 in sequence 27in-lbs
#4 in sequence 9ft-lbs
#5 in sequence 11ft-lbs


Sequence                           7     1                    3     5

          front

                          8     4                    2      6


1996-1998 Upper Intake manifold procedure
#1 Install two corner studs to lineup
#2 torque all to 44in-lbs
#3 torque all to 83in-lbs



Rods 45 ft-lbs
Main bearing caps 80 ft-lbs
Rocker arm studs 35 ft-lbs
Rocker cover 8 ft-lbs        
Rear main oil seal retainer 11 ft-lbs
spark plugs   new heads 22ft-lbs old heads 11ft-lbs
Exhaust manifold 1995 center tube bolts 26ft-lbs front and rear tubes 20ft-lbs
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