Problem with my 1999 Pontiac
3.4 V6 3400
reg. Maintenance
tip/donation yes
GM tech = jk
question = top of motor tore down for oil getting in coolant . Gaskets
found bad at coolant jackets. To replace intake gaskets what is the
procedure for installing correct length push rods in the right spot and valve adjustment
after taking push rods out of way to get gaskets.
In I am former gm tech years ago now heavy truck.
JK:
Thank you for the generous tip/donation.
There is no special valve adjustments on this motor as was the case with the older Chevy
small block. Rocker arms are just torqued to specs. The most important thing is that the
push rods are installed correctly. They are different lengths. GM recommends new lower
intake bolts, and have updated the torque specs. on rocker arms and lower intake bolts.
The intake and exhaust rocker / pushrods are labeled in the picture below.
Bolt part numbers -
11588914 long
11588915 short
Torque spec on rockers is- 14 NM (124 in.lbs.) plus 30 degrees
lower intake is - long- 13 NM (115 in. lbs.)
short- 25 NM (18 FT. lbs.)
3.4 V6 3400
reg. Maintenance
tip/donation yes
GM tech = jk
question = top of motor tore down for oil getting in coolant . Gaskets
found bad at coolant jackets. To replace intake gaskets what is the
procedure for installing correct length push rods in the right spot and valve adjustment
after taking push rods out of way to get gaskets.
In I am former gm tech years ago now heavy truck.
JK:
Thank you for the generous tip/donation.
There is no special valve adjustments on this motor as was the case with the older Chevy
small block. Rocker arms are just torqued to specs. The most important thing is that the
push rods are installed correctly. They are different lengths. GM recommends new lower
intake bolts, and have updated the torque specs. on rocker arms and lower intake bolts.
The intake and exhaust rocker / pushrods are labeled in the picture below.
Bolt part numbers -
11588914 long
11588915 short
Torque spec on rockers is- 14 NM (124 in.lbs.) plus 30 degrees
lower intake is - long- 13 NM (115 in. lbs.)
short- 25 NM (18 FT. lbs.)
GM 3.1L / 3.4L engine push rod valve rocker arm torque adjustment specs.
This procedure is for the 3.1 and 3.4 in many Chevy, Buick, Pontiac and Oldsmobile
models. Malibu, Classic, Lumina, Alero, Regal, Century, Grand Prix, Montana, Transport,
Venture van, Silhouette, etc.
This procedure is for the 3.1 and 3.4 in many Chevy, Buick, Pontiac and Oldsmobile
models. Malibu, Classic, Lumina, Alero, Regal, Century, Grand Prix, Montana, Transport,
Venture van, Silhouette, etc.
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A roller rocker type valve train is used. Motion is transmitted from the camshaft through
the hydraulic roller lifter and from the push rod to the roller rocker arm. The rocker arm
pivots on the needle roller bearings. The rocker arm transmits the camshaft motion to the
valve. The rocker arm pedestal is located in a slot in the cylinder head. The rocker arm is
retained in the cylinder head by a bolt. The push rod is located by the rocker arm.
the hydraulic roller lifter and from the push rod to the roller rocker arm. The rocker arm
pivots on the needle roller bearings. The rocker arm transmits the camshaft motion to the
valve. The rocker arm pedestal is located in a slot in the cylinder head. The rocker arm is
retained in the cylinder head by a bolt. The push rod is located by the rocker arm.
| 2- Intake rods are in this position. |
| 1- Exhaust rods are in this position. |
