vn v6 engine spec's

[Garth]

3.8 liter v6 engine VN

spec’s

cylinder numbers (facing front of engine)

left bank 2-4-6
right bank 1-3-5

Firing order 1-6-5-4-3-2

Flex plate run out maximum
Vn series .02mm

Camshaft
Bearing journal diameter
Vn (upto 11/90) 45.339 to 45.364mm
Vn (from 11/90) 45.334 to 45.369mm

Lobe lift
Vn series (upto 11/90) 6.909mm
Vn (from 11/90), vp, vq, vr
Intake 6.43mm
Exhaust 6.48mm

Acceptable level of camshaft play on all models 0.16 to 0.27mm
Oil pump
Outer bear to housing clearance limit .203to .381mm
Inter gear to outer gear clearance limit .15mm
Gear to end clearance .025 to .089mm
Depth 11.71 to 11.75mm
Diameter 89.10 to 89.20mm
Pressure regulator to bore clearance .038 to .076mm

Torque specifications
Beaming brace
Vn
Clutch housing bolts 15 to.35nm
Torque converter housing bolts 40 to.60nm
Sump bolts 8 to 12nm
Camshaft sprocket bolt
Vn with 3 bolt 30 to 40nm
Vn, 1 bolt 190 to 200nm

Camshaft trust plate screws 12 to 18nm
Crankshaft balancer to crankshaft bolt 270 to 325nm
Cylinder head bolts, in sequence
Step 1 81nm
Step2 turn an additional 90 degrees
Step 3
Vn 81nm

Exhaust manifold to cylinder head bolts/studs 40 to 60nm
Exhaust manifold stud nuts 20 to 27nm
Flywheel/drive plate to crankshaft bolts
Vn (upto 11/90 rope type) 75 TO 90NM
Vn (from 11/90)
Step 1 18-22nm
Step 2 turn an extra 73 degrees

Front cover bolts 20 to 30nm
Inlet manifold to cylinder head bolts 8 to 12nm
Sump bolts 8 to 12nm
Oil filter adapter to timing chain cover bolts 27 to 35nm
Oil pump
Cover screws 8 to 14nm
Pick up tube and screen assembly bolts 8 to 12nm
Rocker arm pivot bolts
Vn to 1989 with pushrod guid plates (series1) 32 to 44nm
Vn 1990 with rocker retainers (series2) 65nm

Timing chain damper retaining bolt 26nm
Valve cover nuts/bolts 7 to 11nm

Use new bolts for vn series flywheel drive plate to crankshaft bolts, discard old one’s. old one’s loose effective thread.