Gates 21778 lower radiator coolant hose for the 1988-1993 Mercedes-Benz 300E 6-cylinder 3.0L, the 1990-1992 300E 6-cylinder 2.6L and other vehicles carries engine coolant between the radiator and the engine. The hose is molded and has no spring.
A worn lower hose can show cracks, a swollen or soft spot, or coolant seepage at its ends; look only with the engine off and cool. These signs alone do not prove the hose is the problem, since a loose clamp can leak the same way.
It fits the 1988-1993 Mercedes-Benz 300E 6-cylinder 3.0L, the 1990-1992 300E 6-cylinder 2.6L, the 1990-1993 Mercedes-Benz 300TE 6-cylinder 3.0L and the 1988-1990 Mercedes-Benz 300CE 6-cylinder 3.0L. The 1990-1993 Mercedes-Benz 300TE 6-cylinder 3.0L takes one. If your Mercedes-Benz is not named here, look up its year and engine in the "Vehicles it fits" section.
Fit and size
Build and materials
Interchange: KM-3181
20232S · 61648 · B71401 · B71539 · 1245013382 · 8468 · R28113 · CHR0046R · CHR0279R
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This part cross-references / interchanges with the following part numbers:
Will this Gates lower radiator hose fit the 1990-1993 Mercedes-Benz 300TE 6-cylinder 3.0L?
Yes. Gates 21778 is listed for the 1990-1993 Mercedes-Benz 300TE 6-cylinder 3.0L. It is a lower hose, and that car takes one.
What are the dimensions of this Gates coolant hose?
Gates 21778 has a 1.34 in (34 mm) inside diameter at both ends and a centerline length of 14.8 in (376 mm).
Is this Gates molded coolant hose rated for hot coolant?
This hose's temperature range runs from -40 °F to +257 °F (-40 °C to +125 °C). Do not use it for fuel or oil transfer.
What does a failing lower radiator coolant hose look like?
With the engine off and cool, look for cracks, a swollen or soft spot, or coolant seepage at the ends. A shop can pressure-test the cooling system.
Should I replace the hose clamps when installing Gates 21778?
Yes. Replace the clamps whenever a new coolant hose goes on, rather than reusing the old ones.
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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.
