Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1998EXPRESS 1 TON VAN V8-5.7L VIN RREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSHEATER CORE
1998 Chevrolet Express 1 Ton Van V8-5.7L VIN R
Heater Core
1998 Chevrolet Express 1 Ton Van V8-5.7L VIN RSECTION Heater Core
| Auxiliary Heater Retaining Nuts | 89 Inch Pound-Force (in.lb) |
| Auxiliary Heater Line Retaining Nut | 18 Foot Pound-Force (ft.lb) |
| Auxiliary Hot Water By-pass Valve Retaining Nut | 44 Inch Pound-Force (in.lb) |
| Auxiliary Heater Line Retainers To The Body | 44 Inch Pound-Force (in.lb) |
| Heater Lines To The Auxiliary Heater Bolt | 18 Foot Pound-Force (ft.lb) |
| Heater Case Retaining Nuts | 53 Inch Pound-Force (in.lb) |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.