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Sinotrck HOWO Truck Parts Engine Parts Intercooler Intake Hose Wg9730530011 for HOWO A7 336 371

Sinotrck HOWO Truck Parts Engine Parts Intercooler Intake Hose Wg9730530011 for HOWO A7 336 371

The WG9730530011 is a genuine intercooler intake hose, also known as an intake air duct or turbocharger outlet hose, used in the forced induction system of SINOTRUK HOWO series heavy-duty trucks, including models such as HOWO 336, 371, 380, A7, T5G, T7H, and Sitrak variants.

This flexible rubber hose connects the turbocharger compressor outlet to the intercooler inlet, allowing high-pressure, high-temperature compressed air to be delivered efficiently to the intercooling system before entering the engine cylinders. As a critical component in the engine air intake path, it directly affects turbocharging efficiency, combustion quality, fuel economy, and emissions performance.

Designed to withstand extreme underhood conditions — including high boost pressure, elevated temperatures, oil mist exposure, and constant engine vibration — this hose must maintain airtight integrity and structural resilience throughout its service life.

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Model:
WG9730530011
Brand:
Sinotruk HOWO

Product Description

Attribute	Specification
Official Name	Intercoiler Intake Hose / Turbo-to-Intercooler Air Duct
Common Names	Boost Air Hose, Charge Air Pipe, Intake Rubber Boot
OEM Brand	SINOTRUK (China National Heavy Duty Truck Group)
Part Number	WG9730530011
Material	High-strength nitrile rubber (NBR) or reinforced silicone rubber, with multiple layers of fabric reinforcement (polyester or aramid fiber)
Construction	Multi-layer design (typically 4–6 layers): inner liner + reinforcing plies + outer protective layer
Color	Commonly red or black; red often indicates high-performance silicone version
Length (L)	Approx. 175 mm
Internal Diameter (ID)	Dual-diameter design: commonly Φ90 mm → Φ110 mm (or symmetrical Φ110 mm), depending on model
Operating Pressure	Withstands turbo boost pressures up to 2.5 bar (36 psi)
Temperature Range	-40°C to +200°C (short-term peak); continuous operation at 150–180°C
Oil Resistance	Resistant to EGR gases and PCV oil vapors that may cause rubber swelling
Flexibility	Absorbs engine vibration and minor misalignments between rigid components
Weight	Approx. 0.8 kg – 1.2 kg
HS Code	4009110000 (Vulcanized rubber tubing without fittings)
Origin	Jinan, Shandong Province, China

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Installation Instructions

✅ Pre-Installation Checks

Confirm correct fitment: Use SINOTRUK EPC system to verify compatibility with your VIN/chassis.
Inspect new hose: Check for cracks, bubbles, soft spots, or deformation.
Prepare mating surfaces: Clean turbo outlet and intercooler inlet of carbon deposits, oil residue, or old gasket material.
Replace clamps: Always use new high-strength stainless steel clamps — never reuse old ones.

✅ Step-by-Step Installation

Position the Hose:

Slide onto the turbocharger compressor nozzle first.
Ensure full seating until shoulder contacts flange.

Connect to Intercooler:

Align and push firmly onto intercooler inlet.
Do not twist during installation.

Install Clamps:

Place heavy-duty worm-drive clamps over both ends.
Tighten evenly until slight compression is visible — do not over-tighten (risk of crushing silicone).