Keep coolant moving between the radiator and engine with the Gates Molded Coolant Hose 21620, a pre-shaped lower radiator hose that installs as a direct-fit replacement across a broad list of 1984-1991 Chevrolet and GMC V8 trucks, vans and SUVs. It fits applications such as the 1984-1986 Chevrolet C10 [V8-5.0L, V8-5.7L], 1987-1991 Chevrolet Blazer [V8-5.7L], 1989-1991 Chevrolet R1500 Suburban [V8-5.7L] and 1984-1991 GMC Jimmy [V8-5.7L], among many others — see the "Vehicles it fits" section for the full list.
Meets the requirements of SAE 20R4 class D2 and DIN 73411 class A (except for tolerances), with a rated temperature range of -40°F to +257°F (-40°C to +125°C). Gates recommends replacing the hose clamps each time a new coolant hose is installed. Caution: do not use for fuel or oil transfer applications. Country of origin: Thailand.
Interchange: 15598366 · 24205L · MC127 · MH-4620 · MH4620 · C1620 · 14-1822-6 · 1418226 · 61274 · 71200 · E71200 · 41274 · 51319494 · 14049414 · 14054260 · 15565363 · 323 · CH3442 · KM-1502 · KM1502 · 8338 · 2046 · 628 · 77-8901-9 · 7789019 · Manufacturer part number 21620.
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What is the Gates 21620?
It's a Gates molded lower radiator coolant hose that carries coolant between the radiator and engine, pre-shaped to route and seal on the listed applications.
Which vehicles does it fit?
It fits a range of 1984-1991 Chevrolet and GMC V8 trucks and SUVs with V8-5.0L or V8-5.7L engines, such as the C10, Blazer, Suburban and GMC Jimmy. See the "Vehicles it fits" section for the full list.
What is the hose made of?
It has an EPDM tube, synthetic fiber knit reinforcement, and a heat-, ozone- and chemical coolant-resistant EPDM cover, and is engineered to resist collapse under vacuum and electrochemical degradation.
Should I replace the hose clamps?
Yes. Gates recommends replacing the hose clamps each time a new coolant hose is installed to help ensure a proper seal.
Can I use it for fuel or oil lines?
No. This is a coolant hose only — Gates cautions against using it for fuel or oil transfer applications.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
