Chevrolet/Pontiac LT 1 & LT 4 Engine Family

Chevrolet/Pontiac LT 1 & LT 4 Engine Family

IMPORTANT: Due to the design of the water pump for the LT 1 / LT 4 engine there is not an improved model yet available. With a minor modification to the bypass opening, the factory pump is sufficient for use with Evans NPG. This modification is only necessary when the thermostat is removed. The bypass opening must be plugged or coolant will circulate through the engine only and not through the radiator. The result would be an engine that continually runs very hot.

System suggestions for LT 1 / LT 4 conversions

Stock applications with out modification.

1. Drain and flush system to completely remove all original anti freeze.

2. Refill system with Evans NPG™.

3. Install 7 psi cap on radiator.

4. Follow manufacturers bleeding instructions for specific vehicle.

Heavy duty or mild performance application.

1. Drain and flush system to completely remove all original anti freeze.

2. Remove thermostat from system.

3. Plug thermostat bypass opening.

4. Install 7 psi cap on radiator.

5. Install upgraded radiator Minimum radiator core suggestions; 300 HP or less with out A/C 4 rows 1/2" tube copper/brass, 300 HP to 400 HP with A/C 2 rows 1" tube aluminum, 400 HP plus minimum of 2 rows 1.25" tube aluminum.

6. Follow manufacturers bleeding instructions for specific vehicle.

Hi performance and race applications.

1. Drain and flush system to completely remove all original anti freeze.

2. Remove thermostat from system.

3. Plug thermostat bypass opening.

4. Install 7 psi cap on radiator.

5. Install upgraded radiator Minimum radiator core suggestions; 300 HP or less with out A/C 4 rows 1/2" tube copper/brass, 300 HP to 400 HP with A/C 2 rows 1" tube aluminum, 400 HP plus minimum of 2 rows 1.25" tube aluminum.

6. Larger inlet and outlet to engine and radiator if possible.

7. Follow manufacturers bleeding instructions for specific vehicle.

Note: Intercoolers restrict the air to the radiator, if possible install separate oil and transmission coolers.

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Copyright © 2004 Evans Cooling Systems, Inc. Page last revised 09/22/2000

Stock applications with out modification.

	1.	Drain and flush system to completely remove all original anti freeze.
	2.	Refill system with Evans NPG™.
	3.	Install 7 psi cap on radiator.
	4.	Follow manufacturers bleeding instructions for specific vehicle.

Heavy duty or mild performance application.

	1.	Drain and flush system to completely remove all original anti freeze.
	2.	Remove thermostat from system.
	3.	Plug thermostat bypass opening.
	4.	Install 7 psi cap on radiator.
	5.	Install upgraded radiator Minimum radiator core suggestions; 300 HP or less with out A/C 4 rows 1/2" tube copper/brass, 300 HP to 400 HP with A/C 2 rows 1" tube aluminum, 400 HP plus minimum of 2 rows 1.25" tube aluminum.
	6.	Follow manufacturers bleeding instructions for specific vehicle.

Hi performance and race applications.

	1.	Drain and flush system to completely remove all original anti freeze.
	2.	Remove thermostat from system.
	3.	Plug thermostat bypass opening.
	4.	Install 7 psi cap on radiator.
	5.	Install upgraded radiator Minimum radiator core suggestions; 300 HP or less with out A/C 4 rows 1/2" tube copper/brass, 300 HP to 400 HP with A/C 2 rows 1" tube aluminum, 400 HP plus minimum of 2 rows 1.25" tube aluminum.
	6.	Larger inlet and outlet to engine and radiator if possible.
	7.	Follow manufacturers bleeding instructions for specific vehicle.


	This page is part of a framed web site. Click the button to load the site from the intended starting point. Copyright © 2004 Evans Cooling Systems, Inc. Page last revised 09/22/2000