Alternators - PCM

Bypass Hose Kit GM LS1 - LS3 Thermostatic Cooling System 

For use with 625-4530 Thermostatic Cooling System.

GM LS1 - LS3 Thermostatic Control Crossover Cooling System for Non-Circulating Pump Applications

AT last a cooling system solution for adapting the popular GM LS engine into any Jet Boat or application with an external water pump source. This system allows removal of the Automotive engine mounted water circulation pump and provides both water inlet/outlet and temperature control through the integrated thermostat assembly. Clean, simple, and reliable the perfect solution for retrofitting the LS modern engine into a jet boat or any boat not utilizing the OEM circulating pump.

WARNING**** will not work with Variable Valve Timing covers.

GM LS1 - LS3 Thermostatic Cooling System for Freshwater Sterndrive Applications

As Hardin Marine continues the quest towards new product development they have designed an easy to install thermostatic cooling system for freshwater raw water cooled engine applications. This system allows use of an OEM circulating style water pump and multiple accessory drive kits to to be used while providing the necessary thermostat assembly for temperature control. This is perfect for retrofitting a GM LS based engine into most popular sterndrive engine applications using a sea water pump assembly. Precision CNC machined and anodized satin finish make for an attractive compact fitment. Each unit features a 160 degree thermostat while other heat range thermostats and a bypass hose assembly is sold separately.

LS Steam Tube Kit w/ Stainless Steel Hard Line Tubing

Earl's hard line steam tube kit is designed to eliminate trapped air and steam from your engine to prevent hot spots & overheating. Easy bolt-on installation when used with Earl's pivoting steam vent adapters - part # LS9807ERL (2 sets required). Made from attractive stainless steel tubing & black anodized components.

This steam tube kit works w/ the Holley LS Hi-Ram, Holley Single Plane, and Sniper Fabricated Intake Manifolds for the GM LS Engine.

Features:

• Steam Tube Kit Eliminates Trapped Air and Steam from Your Engine to Prevent Hot Spots & Overheating
• Custom Look That is More Attractive than Original Equipment (OE) Hard Lines
• Use w/ Adjustable Pivoting Steam Vent Adapters for Easy Installation
• Four Corner Style - Allows Flow of Steam & Coolant from Front & Back of Cylinder Heads
• Made from Stainless Steel Tubing & Black Anodized Aluminum Components – for Corrosion Protection & a Great Look
• Outlet Size - Use w/ 1/4" Hose

Replacement O-Ring for LS1 - LS3 Thermostatic Cooling System 625-4535. Qty. (4) used in application.

These fit the square ports on the base of the unit against the block, and the internal connection between the top cover and base.

Replacement O-Ring for LS1 - LS3 Thermostatic Cooling System 625-4535. Qty. (2) used in application.

These fit the round ports on the base of the unit against the block.

• Made from 316L Stainless Steel.
• Standard 1-1/4" Slip-On Port Entry Stainless Steel Water Inlet Crossover.
• Precisely machined inlet plates welded to a large diameter crossover tube to provide equal water distribution.
• Uses a standard 1-1/4" slip-on inlet connection.
• Port inlet configuration, (check before ordering) for Small Block Chevy engines only.

• Constructed of 316L Stainless Steel.
• Standard 1-1/4" Slip-On Port Entry Stainless Steel Water Inlet Crossover.
• Precisely machined inlet plates welded to a large diameter crossover tube to provide equal water distribution.
• Uses a standard 1-1/4" slip-on inlet connection.
• Bypass

• Constructed of 316L Stainless Steel.
• Standard 1-1/4" Slip-On Starboard Entry Stainless Steel Water Inlet Crossover.
• Precisely machined inlet plates welded to a large diameter crossover tube to provide equal water distribution.
• Uses a standard 1-1/4" slip-on inlet connection.
• Available in port and starboard inlet configuration, (check before ordering) for Small Block Chevy engines only.

• Remove you circulating pump and Experience horsepower gains of up to 15 horsepower while increasing water circulation.
• Kits come complete with all necessary bolts, gaskets, and hardware.
• Bypass systems use a thermostat while non-bypass doesn't.
• Stainless Steel Construction.

• Remove you circulating pump and Experience horsepower gains of up to 15 horsepower while increasing water circulation.
• Kits come complete with all necessary bolts, gaskets, and hardware.
• Bypass systems use a thermostat while non-bypass doesn't.
• Stainless Steel Construction.

• Eliminate your power robbing circulating pump!
• Constructed of 316L stainless steel.
• One large 1" bypass hose for increased water volume.
• Includes 142 degree thermostat.
• Includes Crossover, Thermostat housing, 142 degree thermostat, hose with clamps, bolts & gaskets.
• NOTE: You may need to upgrade to a belt driven bravo sea water pump as applications without one may get too hot at idle.

Water Inlet Crossover Kit for GM LS Engines

These new adapters and crossover tubes allow easy installation of a remote mounted electric water pump on the GM LS engine. These billet aluminum block adapters feature (4) -12 AN O-ring female ports for routing water to a remote mounted electric water pump. The 1/8" NPT Port can be used to connect to the steam tube plumbing.

Water Outlet Hose for LS1 - LS3 Thermostatic Cooling System