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ZZ4 Engine Specifications:
Displacement: ............................................................ 350 cubic inches
Bore x Stroke: ............................................................ 4.00 inch x 3.48 inch
Compression .............................................................. 10:1 nominal
Block: ......................................................................... Cast iron, four-bolt intermediate mains
Cylinder Head: ........................................................... Cast aluminum, 23º valve angle
Valve Diameter (Intake/Exhaust): ...................... 1.94"/1.50"
Chamber Volume: ...................................................... 58cc
Crankshaft: ................................................................ 1053 Forged steel, 1 piece rear seal
Connecting Rods: ...................................................... Forged, powdered metal, 3/8" bolts
Pistons: ...................................................................... High-Silicon aluminum
Rings: ........................................................................ Moly coated cast iron
Camshaft: .................................................................. Hydraulic roller tappet
Lift:.......................................................................474" intake, .510" exhaust
Duration:............................................................. 208° intake, 221° exhaust @.050" tappet lift
Centerline:.......................................................... 108° ATDC intake, 116° BTDC exhaust
Rocker Arm Ratio: ...................................................... 1.5:1
Timing Chain: ............................................................. 8 mm single roller design
Oil Pan: ...................................................................... 4-quart
Oil Pressure (Normal): ............................................... 40 psi @ 2000 RPM
Recommended Oil: .................................................... 10w30 synthetic (after break-in)
Oil Filter: .................................................................... AC Delco part # PF25
............................................................................ Premium AC Delco part # UPF25
Valve Lash: ................................................................ 1/2 turn down from zero lash
Fuel: ........................................................................... Premium unleaded - 92 (R+M/2)
Maximum Engine Speed: ........................................... 5800 RPM
Spark Plugs: .............................................................. AC Delco part # MR43LTS
Spark Plug Gap.......................................................... .040"
Spark Timing: ............................................................. 32° maximum @ 4000 RPM
Firing Order: ............................................................... 1-8-4-3-6-5-7-2
Information may vary with application. All specifications listed are based on the latest production information available at the
time of printing.
ZZ4 Engine Long Block Specifications
TITLE
19172321
REV 09JA15
PART NO.
6
27
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