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Makes 🢒 Generic 🢒 2008 🢒 Unit Repair 🢒 Engine 🢒 Engine Assembly Information - Small Block 🢒 Engine Mechanical Specifications

Engine Mechanical Specifications w/350

ZZ4/FB385 Engine 12561727

Application

Specification

Metric

English

General

  • Block

Cast iron, four-bolt intermediate mains

  • Bore x Stroke

102 mm x 88 mm

4.00  in x 3.48  in

  • Crankshaft

1053 Forged steel, 1 piece rear seal

  • Connecting Rods

Forged, powdered metal, 3/8" bolts

  • Displacement

5.7L

350 CID

  • Firing Order

1-8-4-3-6-5-7-2

  • Maximum Engine Speed

5,800 RPM

  • Oil Filter

AC Delco - PF25

  • Oil Pressure - Normal @ 2000 RPM

276 kPa

40 PSI

  • Pistons

Cast Aluminium

  • Rings

Molly Coated Cast Iron


350HO Engine 12486041

Application

Specification

Metric

English

General

  • Block

Cast iron, four-bolt intermediate mains

  • Bore x Stroke

102 mm x 88 mm

4.00  in x 3.48  in

  • Crankshaft

Nodular iron, 1 piece rear seal

  • Connecting Rods

Forged, powdered metal, 3/8" bolts

  • Compression Ratio

9.1:1

  • Displacement

5.7L

350 CID

  • Firing Order

1-8-4-3-6-5-7-2

  • Fuel

Premium Unleaded - 92 (R+M/2)

  • Maximum Engine Speed

5,700 RPM

  • Oil Filter

AC Delco - PF25

  • Oil Pan

4-quart

  • Oil Pressure - Normal @ 2000 RPM

276 kPa

40 PSI

  • Recommended Oil

10w30 synthetic motor oil (after break in)

  • Pistons

Cast Aluminum

  • Rings

Moly Coated Cast Iron

  • Spark Plugs

AC Delco part # MR43LTS

  • Spark Plug Gap

1.01 mm

.040 in

  • Spark Timing

32° maximum @ 4000 RPM

Camshaft

  • Camshaft Lobe Lift - Exhaust

11.684 mm

.460 in

  • Camshaft Lobe Lift - Intake

11.049 mm

.435 in Intake

  • Camshaft Centerline

109° ATDC Intake

116° BTDC Exhaust

  • Camshaft Duration

212° Intake, 222° Exhaust @ 0.050 in (127 mm) Tappet Lift

  • Tappet Type

Hydraulic Roller Tappet

  • Rocker Arm Ratio

1.5:1

Stamped Steel

  • Timing Chain:

8 mm single roller design

Cylinder Head

Cast Iron

  • Valve Head Diameter - Exhaust

38.1 mm

1.50 in

  • Valve Head Diameter - Intake

49.276 mm

1.94 in

  • Chamber Volume

62 cc

  • Valve Lash

1/8 Turn Down From 0 Lash


350/290 HP Engine 12499529

Application

Specification

Metric

English

General

  • Block

Cast iron, four-bolt intermediate mains

  • Bore x Stroke

101 mm x 88.392 mm

4.00 in x 3.48 in

  • Crankshaft

Nodular iron, 2 piece rear seal

  • Compression Ratio

8.5:1

  • Displacement

5.7L

350 CID

  • Firing Order

1-8-4-3-6-5-7-2

  • Fuel

Regular unleaded - 87 (R+M/2)

  • Maximum Engine Speed

5,100 RPM

  • Oil Filter

AC Delco - PF454 or PF1218

  • Oil Pressure - Normal @ 2000 RPM

138 kPa

20 PSI

  • Oil Pan

3.8L

4 QT

  • Pistons

Cast Aluminum

  • Rings

Cast Iron

  • Recommended Oil

10w30 synthetic motor oil (after break in)

  • Spark Plugs

AC Delco part # R45TS

  • Spark Plug Gap

1.01 mm

.045"

  • Spark Timing

32° maximum @ 3000 RPM

Camshaft

  • Camshaft Lobe Lift - Exhaust

11.684 mm

.460 in

  • Camshaft Lobe Lift - Intake

11.43 mm

.450 in Intake

  • Camshaft Centerline

114° ATDC Intake

114° BTDC Exhaust

  • Camshaft Duration

222° Intake, 222° Exhaust @ 0.050 in (127 mm) Tappet Lift

  • Rocker Arm Ratio

1.5:1

  • Timing Chain:

8 mm single roller design

Cylinder Head

Cast Iron

  • Valve Head Diameter - Exhaust

38.1 mm

1.50 in

  • Valve Head Diameter - Intake

49.276 mm

1.94 in

  • Chamber Volume

62 cc

  • Valve Lash

1/8 Turn Down From 0 Lash


350HO Deluxe Engine 12496968

Application

Specification

Metric

English

General

  • Block

Cast iron, four-bolt intermediate mains

  • Bore x Stroke

101 mm x 88.392 mm

4.00 in x 3.48 in

  • Crankshaft

Nodular iron, 1piece rear seal

  • Compression Ratio

9.1:1

  • Displacement

5.7L

350 CID

  • Firing Order

1-8-4-3-6-5-7-2

  • Fuel

Pemium unleaded - 92 (R+M/2)

  • Maximum Engine Speed

5,700 RPM

  • Oil Filter

AC Delco - PF25

  • Oil Pressure - Normal @ 2000 RPM

276 kPa

40 PSI

  • Oil Pan

3.8L

4 QT

  • Pistons

Cast Aluminum

  • Recommended Oil

10w30 synthetic motor oil (after break in)

  • Rings

Molly Coated Cast Iron

 
  • Spark Plugs

AC Delco part # MR43LTS

  • Spark Plug Gap

1.016 mm

.040"

  • Spark Timing

32° maximum @ 4000 RPM

Camshaft

  • Camshaft Lobe Lift - Exhaust

11.684 mm

.460 in

  • Camshaft Lobe Lift - Intake

11.049 mm

.435 in Intake

  • Camshaft Centerline

109° ATDC Intake

116° BTDC Exhaust

  • Camshaft Duration

212° Intake, 222° Exhaust @ .50"(127 mm) tappet lift

  • Rocker Arm Ratio

1.5:1

  • Timing Chain:

8 mm single roller design

Cylinder Head

Cast Iron

  • Valve Head Diameter - Exhaust

38.1 mm

1.50 in

  • Valve Head Diameter - Intake

49.276 mm

1.94 in

  • Chamber Volume

62 cc

  • Valve Lash

1/8 Turn Down From 0 Lash


FB385 Engine 12496769

Application

Specification

Metric

English

General

  • Block

Cast iron, four-bolt intermediate mains

  • Bore x Stroke

101 mm x 88.392 mm

4.00 in x 3.48 in

  • Crankshaft

Nodular iron, 1piece rear seal

  • Compression Ratio

9.6:1

  • Displacement

5.7L

350 CID

  • Firing Order

1-8-4-3-6-5-7-2

  • Fuel

Pemium unleaded - 92 (R+M/2)

  • Maximum Engine Speed

5,800 RPM

  • Oil Filter

AC Delco - PF25

  • Oil Pressure - Normal @ 2000 RPM

276 kPa

40 PSI

  • Oil Pan

3.8L

4 QT

  • Pistons

Cast Aluminum

  • Rings

Molly Coated Cast Iron

  • Recommended Oil

10w30 synthetic motor oil (after break in)

  • Spark Plugs

AC Delco part # MR43LTS

  • Spark Plug Gap

1.016 mm

.040"

  • Spark Timing

32° maximum @ 4000 RPM

Camshaft

  • Camshaft Lobe Lift - Exhaust

12.954 mm

.510 in

  • Camshaft Lobe Lift - Intake

12.0396 mm

.474 in Intake

  • Camshaft Centerline

108° ATDC Intake

116° BTDC Exhaust

  • Camshaft Duration

208° Intake, 221° Exhaust @ .50" (127 mm) tappet lift

  • Rocker Arm Ratio

1.5:1

  • Timing Chain:

8 mm single roller design

Cylinder Head

Cast Iron

 
  • Valve Head Diameter - Exhaust

39.37 mm

1.55 in

  • Valve Head Diameter - Intake

50.8 mm

2.00 in

  • Chamber Volume

62 cc

  • Valve Lash

1/8 Turn Down From 0 Lash


ZZ4 Engine 24502609

Application

Specification

Metric

English

General

  • Block

Cast iron, four-bolt intermediate mains

  • Bore x Stroke

101 mm x 88.392 mm

4.00 in x 3.48 in

  • Crankshaft

1053 Forged Steel, 1piece rear seal

  • Compression Ratio

10:1

  • Displacement

5.7L

350 CID

  • Firing Order

1-8-4-3-6-5-7-2

  • Fuel

Pemium unleaded - 92 (R+M/2)

  • Maximum Engine Speed

5,800 RPM

  • Oil Filter

AC Delco - PF25

  • Oil Pressure - Normal @ 2000 RPM

276 kPa

40 PSI

  • Oil Pan

3.8L

4 QT

  • Pistons

High Silicont Aluminum

  • Rings

Molly Coated Cast Iron

  • Recommended Oil

10w30 synthetic motor oil (after break in)

  • Spark Plugs

AC Delco part # MR43LTS

  • Spark Plug Gap

1.016 mm

.040"

  • Spark Timing

32° maximum @ 4000 RPM

Camshaft

  • Camshaft Lobe Lift - Exhaust

12.954 mm

.510 in

  • Camshaft Lobe Lift - Intake

12.0396 mm

.474 in Intake

  • Camshaft Centerline

108° ATDC Intake

116° BTDC Exhaust

  • Camshaft Duration

208° Intake, 221° Exhaust @ .50" (127 mm) tappet lift

  • Tappet Type

Hydraulic Roller Tappet

  • Rocker Arm Ratio

1.5:1

  • Timing Chain:

8 mm single roller design

Cylinder Head

Cast Iron

  • Valve Head Diameter - Exhaust

38.1 mm

1.50 in

  • Valve Head Diameter - Intake

49.276 mm

1.94 in

  • Chamber Volume

58 cc

  • Valve Lash

1/8 Turn Down From 0 Lash

Engine Mechanical Specifications w/383

383 Engine 12499106

Application

Specification

Metric

English

General

  • Block

Cast iron, four-bolt intermediate mains

  • Bore x Stroke

102 mm x 97 mm

4.005 in x 3.80 in

  • Crankshaft

1053 Forged steel, 1 piece rear seal

  • Connecting Rods

5.7 in (145mm) Forged, powdered metal, 3/8" studs

  • Displacement

6.2L

383 CID

  • Firing Order

1-8-4-3-6-5-7-2

  • Maximum Engine Speed

6,000 RPM

  • Oil Filter

AC Delco - PF25

  • Oil Pressure - Normal @ 2000 RPM

276 kPa

40 PSI

  • Pistons

Hypereutecic, 244-T5 aluminium alloy

  • Rings

Plasma Moly


ZZ383 Engine 12498772

Application

Specification

Metric

English

General

  • Block

Cast iron, four-bolt intermediate mains

  • Bore x Stroke

102 mm x 97 mm

4.005 in x 3.80 in

  • Crankshaft

4340 Forged Steel, 1 piece rear seal

  • Connecting Rods

5.7 in (145mm) Forged, powdered metal, 3/8" studs

  • Compression Ratio

9.7:1

  • Displacement

6.2L

383 CID

  • Firing Order

1-8-4-3-6-5-7-2

  • Fuel

Premium Unleaded - 92 (R+M/2)

  • Maximum Engine Speed

6,000 RPM

  • Oil Filter

AC Delco - PF25

  • Oil Pan

5-quart (w/new filter)

  • Oil Pressure - Normal @ 2000 RPM

276 kPa

40 PSI

  • Recommended Oil

10w30 synthetic motor oil (after break in)

  • Pistons

Hypereutecic, 244-T5 aluminium alloy

  • Rings

Plasma Moly

  • Spark Plugs

R44LTS for general usage: R42LTS for racing

  • Spark Plug Gap

1.01 mm

.040 in

  • Spark Timing

32° maximum @ 4000 RPM with vacuum advance disconnected

Camshaft

  • Camshaft Lobe Lift - Exhaust

13.4112 mm

.528 in

  • Camshaft Lobe Lift - Intake

12.9286 mm

.509 in Intake

  • Camshaft Centerline

107° ATDC Intake

117° BTDC Exhaust

  • Camshaft Duration

222° Intake, 230° Exhaust @ 0.050 in (127 mm) Tappet Lift

  • Tappet Type

Hydraulic Roller Tappet

  • Rocker Arm Ratio

1.5:1

  • Timing Chain:

8 mm single roller design

Cylinder Head

Aluminium Fast burn

  • Valve Head Diameter - Exhaust

39.37 mm

1.55 in

  • Valve Head Diameter - Intake

50.8 mm

2.00 in

  • Chamber Volume

62 cc

  • Valve Lash

1/2 Turn Down From 0 Lash


HT383 Engine 12499101 HT383E Engine 17800393

Application

Specification

Metric

English

General

  • Block

Cast iron, four-bolt intermediate mains

  • Bore x Stroke

102 mm x 97 mm

4.005 in x 3.80  in

  • Crankshaft

4340 Forged Steel, 1 piece rear seal

  • Connecting Rods

5.7" (145mm) Forged, powdered metal, 3/8" studs

  • Compression Ratio

9.1:1

  • Displacement

6.2L

383 CID

  • Firing Order

1-8-4-3-6-5-7-2

  • Fuel

Premium Unleaded - 92 (R+M/2)

  • Maximum Engine Speed

6,000 RPM

  • Oil Filter

AC Delco - PF25

  • Oil Pan

5-quart (w/new filter)

  • Oil Pressure - Normal @ 2000 RPM

276 kPa

40 PSI

  • Recommended Oil

10w30 synthetic motor oil (after break in)

  • Pistons

Hypereutecic, 244 -T5 aluminium alloy

  • Rings

Plasma Moly

  • Spark Plugs

R44LTS

  • Spark Plug Gap

1.01 mm

.040 in

  • Spark Timing

HT383: 32° maximum @ 4000 RPM with vacuum advance disconnected

HT383E: Non Adjustable (crankshaft sensor)

Camshaft

  • Camshaft Lobe Lift - Exhaust

11.4534 mm

.451 in

  • Camshaft Lobe Lift - Intake

10.9474 mm

.431 in Intake

  • Camshaft Centerline

108° ATDC Intake

116° BTDC Exhaust

  • Camshaft Duration

196° Intake, 206° Exhaust @ 0.050 in (127 mm) Tappet Lift

  • Tappet Type

Hydraulic Roller Tappet

  • Rocker Arm Ratio

1.5:1

  • Timing Chain:

8 mm single roller design

Cylinder Head

Aluminium Fast burn

  • Valve Head Diameter - Exhaust

38.1 mm

1.50 in

  • Valve Head Diameter - Intake

49.276 mm

1.94 in

  • Chamber Volume

64 cc

  • Valve Lash

1/2 Turn Down From 0 Lash