Gates 20840 upper radiator coolant hose for the 1975-1979 Chevrolet G10 V8 5.7L, the 1976 G10 V8 6.6L, the 1977-1979 G10 V8 5.0L and other vehicles carries coolant between the engine and the radiator. This Gates molded coolant hose is sold individually.
- Specifically engineered materials resist collapse under vacuum
- Engineered to resist electrochemical degradation, the leading cause of hose failure
- Pre-shaped molded form to fit and to ensure sealed connections
- EPDM tube with synthetic fiber knit reinforcement and a heat-, ozone- and chemical coolant-resistant EPDM cover
- Meets requirements of SAE 20R4, class D2 and DIN 73411, class A (except for tolerances)
- Temperature range: -40 °F to +257 °F (-40 °C to +125 °C)
Quick facts
- Part: Gates 20840 radiator coolant hose
- Fits: the 1975-1979 Chevrolet G10 V8 5.7L, the 1976 G10 V8 6.6L, the 1977-1979 G10 V8 5.0L and other vehicles
- Position: Upper
- Material: EPDM
- Condition: New
Coolant drips at the hose ends, a hose that looks swollen or soft, or a temperature gauge that climbs can mean the hose needs replacing. With the engine off and cool, look the hose and both ends over for cracks and wet spots first, because a leak at a clamp or the radiator neck can look the same.
Fits
The same upper radiator coolant hose also fits the 1975-1979 Chevrolet G30 V8 5.7L or 6.6L, the 1978-1979 G30 V8 5.0L and the 1979 GMC G1500 V8 5.0L, 5.7L or 6.6L; a vehicle takes one hose. If your vehicle is not named here, look up its year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Upper
- Quantity per vehicle: 1
- Centerline length: 37.8 in (960 mm)
- Inside diameter, both ends: 1.5 in (38 mm)
Build and materials
- Construction: Molded
- Material: EPDM
- Spring: None
- Condition: New
- Country of origin: United States
Installation notes
- Replace the hose clamps each time a new coolant hose is installed.
- Do not use for fuel or oil transfer applications.
Interchange: MH-3840 · 14-1900-0 · BH-1678 · KM-882 · 740 131 · 77-8591-8
26025X · W1508550 · MC58 · 60890 · 70734 · E70734 · MR101 · 326723 · 326799 · 335299 · 025 · C0840 · 7578 · MC118 · 601
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
26025X, W1508550, MC58, MH-3840, 14-1900-0, 20840, 60890, 70734, E70734, MR101, 326723, 326799, 335299, 025, C0840, BH-1678, KM-882, 7578, 740 131, MC118, 601, 77-8591-8
Frequently Asked Questions
Is this Gates radiator coolant hose right for the 1975-1979 Chevrolet G10 V8 5.7L?
Yes. Gates 20840 upper radiator coolant hose fits the 1975-1979 Chevrolet G10 V8 5.7L, and that engine takes one hose. For other years and engines, check the "Vehicles it fits" section.
What temperature range does the Gates coolant hose handle?
The range is -40 °F to +257 °F (-40 °C to +125 °C) for Gates 20840. It meets SAE 20R4 class D2 and DIN 73411 class A, except for tolerances.
Does this molded hose resist collapse under vacuum?
Yes. The materials in this upper radiator coolant hose are specifically engineered to resist collapse under vacuum, and the hose is pre-shaped to fit.
Do I need new clamps with a new upper radiator hose?
Yes. Replace the hose clamps each time a new coolant hose is installed.
What should I look for on my old upper radiator hose?
With the engine off and cool, look for cracks, a spongy or collapsed section, and wetness at either end. Any of these can mean the hose is worn.
