JT3645 Aftermarket Detroit Diesel 6-71TIB Stainless Steel Exhaust Mixing Elbow HDI DET2-90 | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Detroit Diesel 6-71TIB Stainless Steel Exhaust Mixing Elbow HDI DET2-90 - Part Number: JT3645

A stainless wet-turbo mixing elbow for Detroit Diesel 6-71TIB 485HP marine engines. The JT3645 / HDI DET2-90 design bolts to the wet turbocharger with four dog-ear clamps and supplies a 90-degree cooling-water connection.

⚙️ Key Features

• Cast AISI 316 stainless-steel construction

• Wet-turbo four-clamp flange design

• 2-inch cooling-water inlet

• Approximately 8-inch wet-exhaust outlet

• Supplied with gasket and water-inlet hardware

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• HDI DET2-90 → Replaces Johnson & Towers JT3645 / HGE1088 configuration

• HDI DET2-180 is the related straight water-inlet version

OEM / Related Numbers:

• JT3645

• HGE1088

• HDI DET2-90

• HDI DET2-180

Aftermarket / Verified Equivalents:

• HDI Marine: DET2-90

• HDI Marine: DET2-180

Included Components:

• Wet-turbo mixing elbow - Part Number: HDI DET2-90

• Turbo flange gasket - supplied with DET2-90

• 90-degree bronze water hose-barb kit - supplied with DET2-90

• 4 × dog-ear turbo clamps - supplied or reused as specified

🚤 Compatibility

Commonly used on:

• Detroit Diesel 6-71TIB wet-turbo wet-exhaust systems

Typically suits:

• Engine models:

• Detroit Diesel 6-71TIB 485HP wet-turbo marine

• Cooling-Water Inlet: 2 in

• Exhaust Outlet: approximately 8 in / 203mm

• Turbo Attachment: four dog-ear clamps

• Material: cast AISI 316 stainless steel

🔌 Function

The elbow seals to the wet turbo outlet, turns the exhaust gas and introduces seawater before the gas enters the wet exhaust hose.

Common signs of failure:

• External corrosion, cracking or pin-hole leakage

• Internal carbon, rust or salt restriction

• Cooling water entering the manifold, turbocharger or cylinders

• Steam, reduced cooling-water discharge or an abnormally hot exhaust hose

• Loss of power caused by excessive exhaust back-pressure

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging