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Copyright © 2004 Evans Cooling Systems, Inc. Page
last revised 09/22/2000
Buick GN & T Type System Suggestions
| For stock and Hi Performance applications the factory water pump has sufficient volume if the following guidelines are followed. |
| 1986-87 with 1 3/4" diameter thermostat stock HP with no modifications. | ||
| 1. | Remove thermostat. | |
| 2. | Plug the thermostat bypass hose. | |
| 3. | Install restrictor in heater hose. | |
| 4. | Install 7 psi cap on radiator. | |
| 5. | Install air bleed in pump housing. (covered in the Evans instruction manual) | |
| 6. | In hot climates or heavy A/C usage install Evans 3.75"pump pulley. (modifications required with stock crank fan and intercooler.) | |
| 1986-87 with 1 3/4" diameter thermostat with Hi Performance modifications. | ||
| 1. | Remove thermostat. | |
| 2. | Plug the thermostat bypass hose. | |
| 3. | Install restrictor in heater hose. | |
| 4. | Install 7 psi cap on radiator. | |
| 5. | Requires Evans 3.75"pump pulley. | |
| 6. | Install air bleed in pump housing. (covered in the Evans instruction manual) | |
| 7. | Install upgraded radiator Minimum radiator core suggestions; 300HP 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. | |
| 8. | Intercoolers restrict the air to the radiator if possible install separate oil and transmission cooler. | |
| 1985 and older with 2 1/8" diameter thermostat stock HP with no modifications. | ||
| 1. | Install Evans High Flow Thermostat. | |
| 2. | Plug the thermostat bypass hose. | |
| 3. | Install restrictor in heater hose. | |
| 4. | Install 7 psi cap on radiator. | |
| 5. | Install air bleed in pump housing. (covered in the Evans instruction manual) | |
| 6. | In hot climates or heavy A/C usage install Evans 3.75"pump pulley. (modifications required with stock crank fan and intercooler.) | |
| 1985 and older with 2 1/8" diameter thermostat with Hi Performance modifications. | ||
| 1. | Install Evans High Flow Thermostat. or remove thermostat completely. | |
| 2. | Plug the thermostat bypass hose. | |
| 3. | Install restrictor in heater hose. | |
| 4. | Install 7 psi cap on radiator. | |
| 5. | Requires Evans 3.75"pump pulley. | |
| 6. | Install air bleed in pump housing. (covered in the Evans instruction manual) | |
| 7. | 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. | |
| Note: | Intercoolers restrict the air to the radiator, if possible install separate oil and transmission coolers. |
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This
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