The part on the HOWO MAX 4X2 MC13 engine delivers pressurised air from the turbocharger to the intake manifold after cooling. A reliable Boost air system ensures maximum power, fuel efficiency, and low emissions. When you choose authentic Howo Parts, this Boost air system kit guarantees leak free connections and optimal turbo response. Below are detailed descriptions of every component included with this Boost air system assembly.
The V-type clamp Φ77 is a stainless steel band clamp used to seal the connection between The part components. This Boost air system clamp has a 77mm inner diameter and uses a T bolt to apply even radial force around the joint. It is essential for preventing boost leaks that would reduce turbocharger efficiency.
This O ring has a 63mm inner diameter and 2.5mm cross section, made from FPM70 fluoroelastomer. It seals The part pipe joints against pressurised air up to 4 bar and temperatures of 200°C. The high temperature material prevents hardening and leakage, maintaining boost integrity.
The air intake elbow is a 90 degree rubber hose that connects the air cleaner outlet to the turbocharger inlet. This Boost air system elbow is made from silicone rubber with fabric reinforcement, resisting collapse under vacuum and flexing with engine movement. It includes molded end beads for positive clamp retention.
This larger O ring has an 86mm inner diameter and 5mm cross section, also made from FPM70. It seals The part pipe connection at the intercooler outlet or throttle valve housing. Its robust cross section handles higher sealing loads and thermal expansion of the aluminum castings.
This pipe is the front section of the intercooler inlet for MT13 engines with middle in, middle out configuration. The part pipe is made from aluminum with cast mounting flanges. It directs hot compressed air from the turbo into the intercooler for cooling before entering the engine.
Two M10x125 flange bolts with class 10.9 secure the intercooler or large Boost air system brackets to the engine block. The 125mm length passes through thick mounting ears. Torque to 50 Nm. The flange replaces a washer and the thread locking patch resists vibration loosening.
One M8x120 flange bolt is used to mount deep Boost air system components such as the intercooler support bracket. The 120mm length provides sufficient thread engagement in remote bosses. Torque to 25 Nm. Replace with new bolt if removed.
Two M8x60 flange bolts secure The part pipe flanges to the intercooler or cylinder head. The 60mm length accommodates gaskets and spacers. Torque to 25 Nm. Pre applied thread locker prevents loosening under pressure pulsations.
The rear intercooler air inlet pipe is the section that connects the intercooler outlet to the intake throttle valve. This Boost air system pipe is formed from welded steel with a corrosion resistant coating. It includes mounting brackets that attach to the engine block using M8 bolts.
Two Q184 series M8x25 flange bolts fasten The part support brackets to the transmission or engine block. The Q184 design has a slightly different flange geometry but the same 10.9 grade and thread locking. Torque to 25 Nm. Use only with the supplied washers.
The EGR connector cover plate is a stamped steel blank that seals the EGR port on engines where exhaust gas recirculation is not used. This Boost air system cover plate is held by two M8 bolts and uses a sealing gasket to prevent exhaust leaks. It is essential for maintaining manifold pressure.
This gasket is a multi layer steel (MLS) seal that sits between the EGR connector and the exhaust manifold or intake manifold. The part gasket has a raised bead that compresses to create a gas tight seal. Replace whenever the EGR pipe is removed.
Eight M8x20 flange bolts are used throughout The part for attaching sensors, brackets, and small covers. The 20mm length is ideal for thin flanges. Torque to 25 Nm. The integrated flange eliminates the need for washers, speeding assembly.
The intercooler rear air inlet piping is the final section of The part before the air enters the engine. This pipe connects to the intake throttle valve and includes a mounting flange for the intake air temperature and pressure sensor. It is made from cast aluminum with a smooth internal bore to minimize flow restriction.
The M20x1.5 screw plug seals an unused port on The part intake manifold. It is made from zinc plated steel with a hexagon socket drive. Apply sealant to the threads before installation. Torque to 35 Nm to prevent pressurised air from escaping.
This composite washer has an inner diameter of 20.7mm and outer diameter of 28.0mm, with a steel outer ring bonded with FPM1 rubber. It seals The part screw plug or other large threaded ports. The FPM rubber resists hot air and oil mist. Replace the washer if the plug is removed.
This gasket is a flat, fiber reinforced sheet that seals the intake throttle valve to The part pipe. It is pre cut to match the valve flange shape and includes bolt holes. The gasket material resists high intake air temperatures and prevents vacuum leaks that could cause surging.
The air intake connecting pipe is a rubber hose that joins the air cleaner outlet to the turbocharger inlet. This Boost air system hose is made from oil resistant NBR with a spiral wire reinforcement to prevent collapse under suction. Two wire type clamps are used at each end.
Four M8x30 flange bolts are used to mount The part support brackets and the intake throttle valve. The 30mm length provides extra thread grip in deep bosses. Torque to 25 Nm. The thread locking patch is essential on these engine mounted fasteners.
A 300ml tube of LOCTITE 5900 RTV silicone sealant is supplied for sealing flanges and covers on The part. This one part, moisture curing sealant forms a flexible, oil resistant rubber gasket. Apply a 3mm bead around the EGR cover plate and intake throttle valve flanges.
A 20kg container of assembly lubricant is included for coating O rings and bolts during Boost air system assembly. This lubricant prevents galling of aluminum threads and ensures proper O ring seating without tearing. Use sparingly; do not use silicone based greases that could harm oxygen sensors.
Boost air system – genuine HOWO charge air and intake manifold kit for MAX 4X2 MC13
This Boost air system kit includes every pipe, O ring, clamp, gasket, bolt, sealant, and lubricant required for a full intake and charge air system overhaul on the MC13 engine. No extra parts to source.
All bolts in this Boost air system are property class 10.9 with MAN183 thread locking patches. They resist loosening under vibration and provide consistent clamp load for flanged joints, ensuring leak free boost pressure.
The part O rings are FPM70, and gaskets are MLS or fiber reinforced. All are rated for continuous exposure to hot, pressurised air up to 200°C. LOCTITE 5900 sealant and assembly lubricant are also supplied.
Every Boost air system pipe (front inlet, rear inlet, intercooler piping, connecting pipe) is formed to the exact MC13 engine layout. No modification or cutting is required; The part bolts directly in place of the original parts.
The part starts at the turbocharger compressor outlet, where pressurised air at up to 4 bar enters the front intercooler inlet pipe. From there it passes through the intercooler, which lowers its temperature, then exits through the rear intercooler pipe. The air then flows through the intake throttle valve and into the intake manifold. The V type clamp and O rings seal all connections. The EGR connector cover plate and sealing gaskets prevent exhaust leaks from affecting the intake side.
The screw plug seals unused diagnostic ports. The assembly lubricant ensures O rings slide into position without twisting, and LOCTITE 5900 seals the EGR cover plate. A properly sealed Boost air system prevents boost leaks that would reduce power, increase smoke, and raise exhaust gas temperatures. Using genuine HOWO Boost air system components guarantees that all connections withstand the pressure and temperature cycles of a heavy duty diesel engine.
Before installation, allow the engine to cool completely. Remove the old Boost air system pipes and clamps. Clean all mating surfaces on the intercooler, turbocharger, and intake throttle valve. Lubricate each new O ring with the supplied assembly lubricant and install them into the pipe grooves. Assemble the front intercooler inlet pipe to the turbo outlet, securing with the V type clamp (torque 12 Nm).
Install the rear intercooler pipe and the intercooler rear inlet piping using the M8x30 bolts (torque 25 Nm). Mount the EGR connector cover plate with the sealing gasket and the M8x20 bolts (torque 25 Nm), applying LOCTITE 5900 to the cover plate flange. Install the intake throttle valve with its sealing gasket, using the M8x20 bolts. Attach the air intake elbow and connecting pipe with new clamps. Tighten all fasteners to the specified torque, then start the engine and check for boost leaks using soapy water. The part is now ready.
A hissing sound under acceleration typically indicates a boost leak in The part. Inspect the V type clamp and O ring joints for soot traces. If the engine lacks power and produces black smoke, The part may be leaking pressurised air, causing over fueling. Use a boost pressure tester to pressurize the system and listen for leaks. If the intake air temperature reads abnormally high,
the intercooler pipe connections may be loose, allowing hot engine bay air to be drawn in. Cracks in the aluminum Boost air system pipes can occur due to vibration; replace any cracked pipe immediately. A loose screw plug on The part will cause a whistle; reinstall with a new composite sealing washer and torque to 35 Nm. If the EGR cover plate leaks, replace the gasket and reapply LOCTITE 5900.
Inspect The part for leaks every 50,000 km. Check all V type clamps for correct tension; retorque if necessary. The O rings do not have a fixed replacement interval but should be replaced whenever The part pipes are removed.
The EGR cover plate gasket should be replaced each time it is disassembled. LOCTITE 5900 sealant has a shelf life of 12 months after opening; replace the tube if it has hardened. Keep the assembly lubricant container sealed to prevent contamination. If any Boost air system bolt shows rust or thread damage, replace it with a new genuine fastener. Proactive replacement of The part O rings and gaskets at 300,000 km can prevent unexpected boost leaks and power loss.
This Boost air system kit is specifically designed for the SINOTRUK MC13 engine used in HOWO MAX 4X2 tractors, SITRAK C7H, and HOWO T7H trucks. It fits all production years from 2018 onward. The part is also compatible with the MC11 engine, though the intercooler pipe lengths differ. This Boost air system is not compatible with MT07 or WD615 engines. The V type clamp size (77mm) is specific to MC13 turbocharger connections. Always verify your engine serial number before ordering this Boost air system kit.
Aftermarket Boost air system pipes are often made from thinner steel or lower grade aluminum that cracks under thermal stress. The O rings in copy kits may be made from ordinary nitrile rubber, which hardens and leaks within months. Counterfeit V type clamps lack the correct spring tension, leading to joint separation. Generic bolts may not be 10.9 grade and can loosen,
causing boost leaks. Genuine HOWO Boost air system components are manufactured to SINOTRUK’s exact specifications, using heavy gauge aluminum, FPM70 O rings, certified V clamps, and grade 10.9 fasteners. The small additional cost of a genuine Boost air system is insignificant compared to the cost of an engine rebuild caused by a leak that leads to melting a piston due to lean air fuel ratios under high boost. For fleet operators, using a genuine Boost air system ensures consistent power and fuel economy across the entire vehicle fleet.
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