Coolant Hose

The ECH-8729 Coolant Hose by Pai Industries is molded to OEM contours for Mack E7 / ASET / E-Tech engine families, matching part numbers 25501933 and 744GB53. Designed for precision cooling system fit, it handles high pressure, temperature, and vibration typical in heavy-duty Mack applications. Built with quality silicone/rubber materials and reinforced construction, it resists cracking, bulging, and early failure. Sold by Wofford Truck Parts, it offers a trusted, direct replacement you can count on.

Pai Industries Part No: ECH-8729

$184.19

Specifications

The Pai ECH-8729 Coolant Hose is engineered for Mack E7 / ASET / E-Tech engines as a contoured OEM replacement (cross-reference to Mack 25501933 and 744GB53). As part of the cooling circuit, this hose delivers coolant between engine components while withstanding thermal cycling, pressure fluctuations, and vibration. Its molded shape ensures proper fit and routing without kinks or stress, helping maintain coolant flow and engine temperature control. Reinforced silicone/rubber construction provides durability against hose fatigue and failure. Wofford Truck Parts offers the genuine PAI unit so you get the correct part, reliable sealing, and long-term performance under demanding engine conditions.

Weight

1.76

Compatibility

Mack CH Series (CH, CH600, CH613) – with E7 engines (approx. 1990–2005)

Mack Vision (CX / CXN) – introduced 1999, used E7 and early ASET (1999–2007)

Mack Pinnacle (early production) – early models still had ASET engines (2006–2007)

Mack Granite Series – vocational trucks with E7 / ASET power (2001–2006)

Mack RD / RB Series – vocational trucks with E7 power (early 1990s–2004)

Mack CL Series – long-haul tractors with E7 (1990s–early 2000s)

Alternative Part Numbers

Mack 25501933
Mack 744GB53
25501933
744GB53
MAK 744GB53
PAI ECH-8729

Related Parts

Coolant Hose - 840148 $90.17

Coolant Hose - ECH-8729 $184.19