Dayco 70448 lower radiator coolant hose for the 1961-1966 Ford Thunderbird and other vehicles carries coolant between the radiator and the engine. Over time a hose can soften, swell or crack, and this Dayco radiator coolant hose replaces one that has.
- Dual I.D. hose construction
- Meets SAE J20R4 Class D-1 and SAE J1684 Type EC
- Trunk height of 12 1/2 in
- Sold without a protective sleeve or heat shield
Quick facts
- Part: Dayco 70448 radiator coolant hose
- Fits: the 1961-1966 Ford Thunderbird and other vehicles
- Position: Lower
A soft, swollen or cracked hose, coolant drips or an engine that runs hot can point to this hose. A thermostat, radiator cap, water pump or the radiator itself can also be behind overheating or coolant loss, so track down the source before you buy a hose.
Fits
The vehicles it fits include the 1961-1966 Ford Thunderbird, the 1965-1966 Mercury Montclair V8 6.4L or 7.0L and the 1966 Montclair V8 6.7L, and the 1965-1966 Mercury Monterey V8 6.4L or 7.0L and the 1966 Monterey V8 6.7L, with one hose per application. Open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Position: Lower
- Quantity per vehicle: 1
- Trunk height: 12 1/2 in
Build and materials
- Hose type: Dual I.D. hose
- SAE specification: SAE J20R4 Class D-1, SAE J1684 Type EC
Interchange: 20018S · MC20 · 20412 · 60475 · KM230 · KM603 · 7236 · H157 · H288 · CH135 · CH280
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
20018S, MC20, 20412, 60475, KM230, KM603, 7236, H157, H288, CH135, CH280, C1SS-8286-D, C1SS-8A319-B, C4AZ-8286-D, C4ME-8286-A, C4SE-8286-A, C4SZ-8286-A, C5AE-8286-H, C5MY-8286-A, 389066
Frequently Asked Questions
Does the Dayco 70448 fit the 1965-1966 Mercury Monterey V8 6.4L or 7.0L?
Yes. Dayco 70448 fits the 1965-1966 Mercury Monterey V8 6.4L or 7.0L and the 1966 Monterey V8 6.7L. For other cars, use the "Vehicles it fits" section.
Is the Dayco coolant hose sold with a protective sleeve or heat shield?
No. This Dayco 70448 hose contains neither a protective sleeve nor a heat shield.
Which SAE specifications does this dual I.D. radiator hose meet?
It meets SAE J20R4 Class D-1 and SAE J1684 Type EC, and it is a dual I.D. hose with a trunk height of 12 1/2 in.
Can I spot a failing lower radiator hose without starting the engine?
Yes. With the engine off and cool, look along the hose for cracks, swelling, soft spots or wet coolant residue. A shop can pressure-test it for hidden leaks.
Does Dayco 70448 interchange with 20412?
Yes. 20412 is one of the numbers that Dayco 70448 replaces, so you can use it to cross-check against an older hose.
