Gates 21978 upper radiator coolant hose for the 1992-1994 Chevrolet S10 Blazer V6 4.3L and other vehicles carries coolant between the engine and the radiator. It is a Gates molded coolant hose for the upper position, and it replaces a hose that has worn out or started to leak.
- Specially engineered materials resist collapse under vacuum
- Resists electrochemical degradation, a leading cause of hose failure
- Pre-shaped to fit and to seal at the connections
- EPDM tube, synthetic fiber knit reinforcement and a heat-, ozone- and chemical coolant-resistant EPDM cover
- Meets SAE 20R4 class D2 and DIN 73411 class A, except for tolerances
- Temperature range of -40 °F to +257 °F (-40 °C to +125 °C)
Quick facts
- Part: Gates 21978 radiator coolant hose
- Fits: 1992-1994 Chevrolet S10 Blazer V6 4.3L and other vehicles
- Position: Upper
- Material: EPDM
- Condition: New
A soft or swollen hose, cracks, coolant seepage at the ends or a falling coolant level can mean a coolant hose is due for replacement. Look at hoses only when the engine is cool. These signs alone do not prove the hose is the problem, because a leaking radiator can show the same coolant loss.
Fits
The 1992-1994 GMC Jimmy V6 4.3L and the 1992-1994 Oldsmobile Bravada V6 4.3L take this hose too, along with other vehicles. If your vehicle is not named here, look up your year and model in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Upper
- Quantity per vehicle: 1
- Centerline length: 28.7 in (729 mm)
- End 1 inside diameter: 1.27 in (32 mm)
- End 2 inside diameter: 1.27 in (32 mm)
Build and materials
- Material: EPDM
- Construction: Molded
- Condition: New
- Country of origin: United States
In the box
One radiator coolant hose. This listing holds one hose, and a vehicle uses one.
Installation notes
- Replace the hose clamps each time a new coolant hose is installed.
- Do not use this hose for fuel or oil transfer applications.
Interchange: KM-3131
24280L · 62041 · 71658 · D71658 · 15648162 · 15689278 · 15983288 · 993 · 8668
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
24280L, 21978, 62041, 71658, D71658, 15648162, 15689278, 15983288, 993, KM-3131, 8668
Frequently Asked Questions
Does the Gates 21978 hose fit the 1992-1994 GMC Jimmy V6 4.3L?
Yes. Gates 21978 is listed for the 1992-1994 GMC Jimmy V6 4.3L as an upper hose, and that vehicle takes one.
What temperatures can this Gates radiator coolant hose handle?
Gates 21978 has a temperature range of -40 °F to +257 °F (-40 °C to +125 °C). Its materials are engineered to resist collapse under vacuum.
Is this Gates coolant hose made of EPDM?
Yes. The tube and the cover are EPDM, with a synthetic fiber knit reinforcement, and the cover resists heat, ozone and chemical coolants.
Should I replace the hose clamps when installing this coolant hose?
Yes, replace the clamps each time a new coolant hose goes on. This hose is not for fuel or oil transfer applications.
What are the inside diameters and length of this upper hose?
Gates 21978 has a 1.27 in (32 mm) inside diameter at both ends. Its centerline length is 28.7 in (729 mm).
