Dayco 87840 heater hose for the 1991-1995 Jeep Wrangler 4-cylinder 2.5L or 6-cylinder 4.0L is a replacement coolant hose for the cabin heater circuit.
A coolant leak at the hose, a cracked or swollen hose, or a heater that blows cool air can mean the heater hose is worn. These signs alone do not prove the hose is at fault, since a stuck thermostat can also leave the cabin cold.
It fits the 1991-1995 Jeep Wrangler with the 4-cylinder 2.5L (L4-2.5L) or the 6-cylinder 4.0L (L6-4.0L).
This listing is one heater hose, and the 1991-1995 Jeep Wrangler 4-cylinder 2.5L or 6-cylinder 4.0L takes one.
Interchange: 18022L · 18702 · 63272 · 4545 · 10702
This part cross-references / interchanges with the following part numbers:
Is this the right heater hose for a 1991-1995 Jeep Wrangler 6-cylinder 4.0L?
Yes. Dayco 87840 fits the 1991-1995 Jeep Wrangler with the 4-cylinder 2.5L (L4-2.5L) or the 6-cylinder 4.0L (L6-4.0L), so both engines are covered.
Where does this heater hose connect in the heating system?
The catalog lists it as heater to engine and heater to pipe, so it links the cabin heater with the engine and with the pipe.
Is 18702 a cross-reference for Dayco 87840?
Yes. 18702 is one of the numbers this Dayco 87840 hose replaces, along with 18022L, 63272, 4545 and 10702.
How can I check an old heater hose before replacing it?
With the engine off and cool, look over the old hose for cracks, bulges and coolant stains. A shop can pressure-test the cooling system if the source of a leak is unclear.
Is Dayco 87840 the same thing as an HVAC heater hose?
Yes. HVAC heater hose is another name for this Dayco 87840 hose, the coolant hose for the heater circuit.
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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.
