The rear exhaust manifold assembly is a critical component that collects exhaust gases from the rear three cylinders of the HOWO MAX 4X2 engine and directs them to the turbocharger. A high‑quality rear exhaust manifold assembly ensures proper exhaust flow, reduces backpressure, and prevents dangerous leaks. This genuine HOWO rear exhaust manifold assembly kit includes the manifold itself (sold separately) and the exhaust pipe sealing ring. When you choose authentic Howo Parts, you receive a rear exhaust manifold assembly engineered for the MC13 engine platform. For a complete exhaust system overhaul, also see our front manifold kit and exhaust system kit.
The exhaust pipe sealing ring is a precision‑formed metal ring that seals the joint between the rear exhaust manifold assembly and the turbocharger inlet pipe or between the manifold and the cylinder head. Four sealing rings are supplied, each made from high‑temperature alloy steel with a graphite coating. The ring has a C‑shaped cross‑section that compresses when the bolts are tightened,
creating a leak‑tight seal. This sealing ring is designed to withstand exhaust gas temperatures up to 950°C and repeated thermal cycles without losing elasticity. It is essential for preventing exhaust leaks that would reduce turbo boost pressure and increase noise. The sealing ring must be replaced whenever the rear exhaust manifold assembly is removed, as the old ring will have taken a permanent set. Each ring is batch‑tested for spring force and material hardness. Using genuine HOWO sealing rings ensures a perfect fit and reliable sealing.
The rear exhaust manifold assembly (main component) is a cast iron manifold that collects exhaust from cylinders 4‑6. One manifold is supplied, made from high‑silicon ductile iron that resists thermal fatigue and cracking. The manifold features individual runners that merge into a single outlet flange. The internal passages are smooth to minimize backpressure and improve turbocharger response. The manifold includes mounting bosses for heat shields and EGR connections. The mating face to the cylinder head is precision‑machined flat to ensure a gas‑tight seal with the exhaust gasket.
The manifold outlet flange is designed to mate with the turbocharger inlet using the exhaust pipe sealing ring. This rear exhaust manifold assembly is a direct replacement for the original part on MC13 engines.
It is secured to the cylinder head using heat‑resistant M10 bolts and spacer bushings (not included in this kit, but available separately). The manifold’s compact design fits within the tight engine bay of the HOWO MAX 4X2, providing reliable service for over 500,000 km under normal operating conditions. A cracked or warped rear exhaust manifold assembly can cause exhaust leaks, loss of turbo boost, and engine power loss. Replacing it with a genuine HOWO manifold restores performance and fuel efficiency.
Rear exhaust manifold assembly – genuine HOWO rear manifold and sealing ring kit
| Material Encoding | Name |
|---|---|
| 202V98701-0130 | Exhaust pipe sealing ring |
This rear exhaust manifold assembly is cast from high‑silicon ductile iron that resists thermal fatigue and cracking. The material has excellent high‑temperature strength and oxidation resistance, ensuring long service life.
The manifold flanges are machined flat to within 0.05mm, ensuring a perfect seal with the cylinder head gasket and the exhaust pipe sealing ring. No warpage or leaks.
This rear exhaust manifold assembly kit comes with the correct exhaust pipe sealing ring. The ring is made from high‑temperature alloy steel with a graphite coating for a leak‑tight seal at the turbocharger connection.
This manifold is a direct bolt‑on replacement for the original part on MC13 engines. The bolt pattern, port spacing, and outlet flange dimensions match exactly, eliminating any fitment issues.
The rear exhaust manifold assembly collects exhaust gases from cylinders 4, 5, and 6. These gases are routed through individual runners that merge into a single outlet. The manifold is bolted directly to the cylinder head using heat‑resistant bolts and a multi‑layer steel gasket. At the outlet, the manifold connects to the turbocharger inlet pipe via the exhaust pipe sealing ring. The manifold’s design minimizes flow restrictions, which improves turbocharger response and reduces exhaust backpressure.
A properly functioning manifold also helps maintain even exhaust gas temperatures, preventing hot spots that could damage the turbocharger. If the manifold cracks or warps, exhaust gases can leak, causing a hissing noise, loss of boost pressure, and potentially damaging nearby components with excessive heat. Replacing a faulty rear exhaust manifold assembly with a genuine HOWO part restores engine performance and fuel efficiency.
Before starting, allow the engine to cool completely. Remove the turbocharger inlet pipe and any heat shields in the way. Unbolt the old manifold using a socket and breaker bar; note that the bolts may be seized due to heat cycling. Clean the cylinder head mounting surface with a scraper and brake cleaner. Install a new exhaust pipe gasket (not included; order separately) onto the cylinder head studs. Position the new rear exhaust manifold assembly onto the studs.
Install new heat‑resistant M10 bolts and spacer bushings (available separately). Torque the bolts to 45 Nm in a crossing pattern starting from the center. Place the new exhaust pipe sealing ring into the manifold outlet flange. Reattach the turbocharger inlet pipe and torque its bolts to 25 Nm. Reinstall any heat shields. Start the engine and check for exhaust leaks using soapy water or a smoke machine. If no leaks are detected, the installation is complete. Always use genuine HOWO gaskets and sealing rings to ensure a leak‑free assembly.
This rear exhaust manifold assembly is specifically designed for the MC13 engine used in the HOWO MAX 4X2 tractor. It fits all production years from 2018 onward. The manifold is not compatible with the MC11 or MC07 engines due to different port spacing. Always verify your engine serial number before ordering. The exhaust pipe sealing ring is also used on the front manifold and turbocharger inlet; it is a universal part for this engine family.
Inspect the manifold every 100,000 km for cracks or warpage. Check the bolts for tightness; retorque to 45 Nm if necessary. The exhaust pipe sealing ring should be replaced whenever the turbocharger inlet pipe is removed. The manifold itself, if not cracked, can be reused indefinitely. However, if the mounting flange is warped beyond 0.1mm, the manifold must be replaced. Keep the area around the manifold free from oil or debris to prevent fires. A well‑maintained rear exhaust manifold assembly will last the life of the engine.
If you hear a hissing noise that increases with engine load, suspect an exhaust leak at the manifold-to-cylinder head joint or at the turbocharger inlet. Use a soapy water spray to locate the leak. If the leak is at the manifold flange, replace the gasket and retorque the bolts. If the leak is at the turbocharger inlet, replace the exhaust pipe sealing ring.
A cracked manifold may produce a loud ticking noise that changes with engine temperature. Inspect the manifold visually for cracks, especially between the runners. If cracks are found, replace the entire rear exhaust manifold assembly. Never attempt to weld a cracked cast iron manifold; the heat‑affected zone will be brittle and prone to re‑cracking. Always use genuine HOWO parts for replacement.
Aftermarket exhaust manifolds are often made from lower grade cast iron that cracks under thermal stress. The bolt holes may not align correctly, causing cross‑threading or stripped threads. The sealing ring in copy kits may be made from plain steel that does not maintain spring tension after heat cycling.
Genuine HOWO rear exhaust manifold assembly components are manufactured to the exact specifications of the original MC13 engine, using high‑silicon ductile iron and certified alloy steel sealing rings. The small additional cost is far outweighed by the reliability and safety of a leak‑free exhaust system.
The rear exhaust manifold assembly is shipped in a reinforced cardboard box with foam padding to prevent damage. The sealing ring is in a sealed poly bag inside the same box. The packaging is recyclable. The manufacturing facility is ISO 14001 certified. No hazardous substances are used in production. The manifold is coated with a rust preventive oil that should be wiped off before installation.
This rear exhaust manifold assembly kit includes the manifold (order separately using material encoding 200V08101-6317) and the exhaust pipe sealing ring (202V98701-0130). The sealing ring can also be ordered alone. Authorized HOWO dealers in Nigeria stock these genuine parts. For fleet orders of five or more manifolds, volume discounts are available. Always provide your engine serial number to confirm compatibility.
Fleet managers who have installed this genuine HOWO rear exhaust manifold assembly report that it fits perfectly and has eliminated exhaust leaks. The included sealing ring provided a leak‑free connection to the turbocharger. The manifold has resisted cracking even after many heat cycles. Many operators have standardized on this rear exhaust manifold assembly for all MC13 engine repairs, citing the ease of installation and the reliability of genuine parts.
The rear exhaust manifold assembly is shipped in a box measuring 50cm x 30cm x 20cm, weight 8 kg. Store the manifold in a dry indoor area. Do not remove the rust preventive oil until installation. The shelf life is indefinite when stored properly. Protect the manifold from impact that could crack the cast iron.
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