tercelandy

Hey there, I'm working on a 88-94 Astro Van. V6 4.3L.

I was wondering if anyone might have the torque specs for this vehicle.

In particular, the water pump to block specs, and other pertinent specs.

If anyone could help me, I WOULD GREATLY APPRECIATE IT!

Thanks in advance, Andy.

brcidd

I usually just use "mechanics" torque on those but here is what you want.....

TORQUE SPECIFICATIONS
Application Ft. Lbs. (N.m)
Balance Shaft Gear Bolt
Step 1 15 (20)
Step 2 Additional 35 Degrees
Balance Shaft Retainer Plate Bolts 10 (14)
Bellhousing Bolt 32 (44)
Camshaft Sprocket Bolt 21 (28)
Connecting Rod Cap Nut (1)
Crankshaft Damper Bolt 70 (95)
Cylinder Head Bolt (2)
Step 1 25 (34)
Step 2 44 (60)
Step 3 66 (90)
Exhaust Manifold Bolt
Center 2 26 (35)
All Others 19 (26)
Flywheel Bolt 74 (100)
Front Cover Bolt 10 (14)
Intake Manifold Bolt
VIN W
Lower Manifold (3) 35 (48)
Upper Manifold (4)
VIN Z (5)
Main Bearing Cap Bolt 78 (106)
Oil Filter Adapter Bolt 16 (22)
Oil Pan Nut 16 (22)
Oil Pump Bolt 66 (90)
Rear Crankshaft Oil Seal Retainer Bolt 11 (15)
Rocker Arm (With Screw-In Studs)
Rocker Nut 19 (26)
Rocker Stud 35 (48)
Valve Lifter Retainer Bolt 12 (16)
Water Pump Bolt 30 (40)
INCH Lbs. (N.m)
Oil Pan Bolt 97 (11)
Oil Pump Cover Bolt 80 (9)
Valve Cover Bolt 89 (10)
(1) Tighten nut to 20 ft. lbs. (27 N.m) then tighten an additional 70 degrees.
(2) Apply GM(R) Sealant (1052080) to head bolt threads. Tighten bolts in sequence. See Fig.
6 .
Page 1 of 4.3L V6 - VINS [W,Z] -1994 Chevrolet

tercelandy

Thank You Very Very Much!

The Ojibwe

I am currently working on a 1993 Chevy Astro Van and need to know the sequence of tightening the cylinder head bolts