Chevrolet 350 H.O. Turn Key Engine Kit
This document provides specifications and installation guidance for the Chevrolet 350 H.O. Turn Key Engine Kit (Part Number 19418224). It is intended to be used in conjunction with the "350 H.O. Deluxe Engine Specifications" and the "Serpentine Belt Accessory Drive Package Specifications".
Introduction
Chevrolet Performance is dedicated to providing proven, innovative performance technology. This kit includes components to enhance the 350 H.O. Deluxe Crate engine assembly, such as a starter, ignition wires, filters, and bypass hoses.
Please read this entire publication before starting work and verify all components listed in the package contents were shipped with the kit.
Safety Precautions: Observe all safety precautions and warnings in the Chevrolet service manuals. Wear eye protection and appropriate protective clothing. Support the vehicle securely with jack stands. Use proper tools and exercise extreme caution with flammable, corrosive, and hazardous materials. If you lack the necessary training, expertise, or tools, this work should be performed by a professional.
Disclaimer: The information in this publication is provided without warranty. The user assumes all risk. Chevrolet, Chevy, the Chevrolet Bow Tie Emblem, General Motors, and GM are registered trademarks of General Motors LLC.
Package Contents
The following table lists the components included in the 350 H.O. Turn Key Engine Kit:
| Item | Description | Qty. | GM Part # |
|---|---|---|---|
| 1 | Engine, 350 H.O. (350 H.O. Deluxe) | 1 | 19420874 |
| 2 | Kit, Serpentine front dress with A/C | 1 | 19418818 |
| 3 | Push rod, fuel pump | 1 | 3704817 |
| 4 | Plate, fuel mounting | 1 | 3719599 |
| 5 | Gasket, Fuel pump plate | 1 | 12560223 |
| 6 | Bolts, fuel pump | 2 | 88891769 |
| 7 | Bolts, fuel pump plate | 2 | 9440033 |
| 8 | Breather | 1 | 19131218 |
| 9 | Motor, Starter | 1 | 10465143 |
| 10 | Bolt, starter (short) | 1 | 14097279 |
| 11 | Bolt, starter (long) | 1 | 14097278 |
| 12 | Hose, bypass | 1 | 1485552 |
| 13 | Fitting, bypass hose | 2 | 6272959 |
| 14 | Clamp, bypass hose | 2 | 11610236 |
| 15 | Supports, sparkplug wires | 1 | 12496806 |
| 16 | Bracket, Wire support | 2 | 12554210 |
| 17 | Bracket, Wire support | 1 | 12554084 |
| 18 | Bracket, Wire support | 3 | 88891792 |
| 19 | Bracket, Wire support | 1 | 12554085 |
| 20 | Plug, 3/8" NPT (National Pipe Thread) internal hex | 1 | 14090911 |
| 21 | Plug, 1/2" NPT (National Pipe Thread) internal hex | 1 | 93439312 |
| 22 | Kit, Lift bracket | 2 | 12363238 |
| 23 | Instruction sheet | 1 | 19418224 |
| 24 | Bolt lift bracket | 2 | 88963065 |
NOTE: All components may vary due to running changes.
Torque Specifications
The following torque values are in addition to those documented within the 350 H.O. Crate Engine and Serpentine Belt Accessory Drive Package instructions.
| Fastener | Torque (lb.ft.) | Torque (Nm) |
|---|---|---|
| Bolts, Fuel pump plate | 9 | 12.0 +/- 2.0 |
| Bolts, Fuel pump | 30 | 40.0 +/- 5.0 |
| Bolts, Starter motor | 30 | 40 |
| Bolts, Lift bracket | 35 | 47.5 |
| Bolts, Wire support | 9 | 12 +/- 2.0 |
NOTE: The following procedures may be performed before, during, or after your engine is installed. Your application will help you determine when the procedure should be performed.
Installation Procedures
Fuel Pump Installation
The 350HO Turn Key engine does not include a fuel pump. The fuel pump pushrod is provided for use with an aftermarket mechanical fuel pump. A pump with a 7 psi shut off pressure and free flow rating of 30 gph is recommended.
- Remove fuel pump block off plate from engine block.
- Clean off any residual gasket material from block.
- Slide fuel pump pushrod into engine block, and then install fuel pump mounting plate, gasket, and bolts.
- Install fuel pump, gasket, and bolts. Ensure fuel pump pushrod is in correct contact with the top of the fuel pump lever. Connect fuel supply and return lines to pump.
Breather, and Air cleaner installation
- Push supplied breather into grommet on driver side valve cover.
- Install double ended threaded rod into top center of the carburetor, then install air cleaner assembly and gasket.
- Secure air cleaner assembly with the wing nut.
Bypass Hose and Plugs
Note: Before installing bypass hose be sure you have the correct rotation water pump installed on your engine. The correct water pump is supplied with the Serpentine Belt Accessory Drive Package.
- Install one bypass hose fitting into intake manifold and one into water pump.
- Take the supplied bypass hose and cut to size, to fit between the water pump and intake manifold fittings.
- Install bypass hose and secure with supplied clamps.
- Any small block engine, regardless of year, that uses Vortec heads, will require an external coolant bypass line from the intake manifold to the 5/8" hose nipple on the water pump (passenger's side). Suggested routing is from the 3/8" NPSF boss on intake manifold to the water pump.
Starter Motor Installation
- Bolt starter to engine block using supplied bolts; gear end of starter will mesh with flexplate.
- Connect wires to starter. (See instructions enclosed in starter box)
Lift Bracket Kit Installation
- Install one bracket and bolt onto front of passenger side cylinder head. Install the other bracket and bolt onto the rear of the driver side head.
- Note: If installing the lift brackets before the spark plug wires and brackets, you will have to remove the rear lift bracket when installing the driver side spark plug wire support.
Spark plug wires and support installation
Install spark plug wires from distributor cap to spark plugs. See chart below for wire lengths.
V-8 Small Block 90deg. Boots
- Cylinder 1: 39.0"
- Cylinder 2: 41.5"
- Cylinder 3: 37.0"
- Cylinder 4: 35.5"
- Cylinder 5: 32.0"
- Cylinder 6: 31.5"
- Cylinder 7: 30.0"
- Cylinder 8: 29.0"
Install large metal support brackets to the back of the cylinder heads. Install small metal support brackets to the sides of the head. Route the spark plug wires into the plastic clips and slide clips onto the metal supports.
350 HO Turnkey Engine Specifications
Note: The specifications below are in addition to those documented within the 350 HO Crate Engine and Serpentine Belt Accessory Drive Package instructions.
Component: Characteristics
- Motor: Starter: Lightweight, high-performance starter. Can be used on any big or small block Chevy V8 with 12 ¼” (153 tooth) flywheel.
- Wires, Spark Plug Wires and Supports: Performance spark plug wire set with 90º spark plug boots.
**Information may vary with application. All specifications listed are based on the latest production information available at the time of printing.
350 HO Turnkey Engine Service Parts List
See Package Contents for the service parts list.
