Air Compressor Cylinder Head Assembly 1191100481 / 1-19110048-1 For ISUZU CXZ81 10PE1 — ISO/TS16949, 2.82 Kg, Metal Construction

The Air Compressor Cylinder Head Assembly with OEM references 1191100481 / 1-19110048-1 (factory description HEAD ASM; CYL, AIR CMPR) is a verified replacement compressor cylinder head for ISUZU CXZ81 heavy-duty trucks equipped with the 10PE1 diesel engine, covering vehicle platforms including CVCXCY. This is the complete cylinder head assembly for the air compressor — the critical component that houses the intake and discharge valves and forms the compression chamber that supplies pressurized air to the vehicle's brake and pneumatic systems.

The air compressor is an essential auxiliary system on heavy-duty commercial trucks. It generates and maintains the compressed air required for service brakes, parking brakes, air suspension, and other pneumatic accessories. The cylinder head is the heart of the compressor — its valve seats, air passages, and sealing surfaces determine the compressor's ability to build and maintain pressure. A worn or failed cylinder head leads to slow air pressure build-up, compressor knock, oil carry-over into the air system, and ultimately brake system performance degradation.

The unit is supplied under the YIMI brand, a recognized aftermarket supplier of Japanese commercial vehicle parts, and is manufactured under ISO/TS16949 certification. It is constructed from metal (steel) and carries a reference net weight of 2.82 kg. The HS code is 841490100, the pack quantity is 1 PCS, and the figure/key number is 039-008.

• OE Reference & Part Name Verified: 1191100481 / 1-19110048-1 — confirmed as "HEAD ASM; CYL, AIR CMPR" (Cylinder Head Assembly; Air Compressor) across multiple supplier catalogs.
• Vehicle & Engine Coverage Verified: ISUZU CXZ81 with 10PE1 engine — confirmed across Dutch, Bengali, Persian, Portuguese, Japanese, German, and Thai language portals. Related coverage includes CXZ/10PD1 and ISUZU GIGA 10PC1.
• Brand & Certification Verified: YIMI brand; ISO/TS16949 certification — confirmed by Japanese and German supplier listings.
• Material Verified: Metal / Steel — confirmed by Bengali and Japanese supplier specifications.
• Net Weight Verified: 2.82 kg — confirmed consistently across Dutch, Persian, Japanese, German, and Thai supplier data.
• HS Code Verified: 841490100 — confirmed across Dutch, Persian, Japanese, German, and Thai listings.
• Figure / Key Number Verified: 039-008 — confirmed across Dutch, Persian, Japanese, German, and Thai supplier data.
• Pack Quantity Verified: 1 PCS — confirmed across multiple language portals.
• Warranty Reference: 3 months — confirmed by Persian and Thai supplier listings.
• MOQ & Supply Reference: MOQ 1–50 pcs (supplier-dependent); supply capacity 1,000 pcs/month; delivery 1–20 days (supplier and stock dependent).
• Quality Tier Options: Original / BVP / Aftermarket quality tiers available — confirmed by Japanese and German supplier data.

• Slow air pressure build-up / compressor takes too long to reach cut-out pressure: Worn valve seats, carbon buildup, or a cracked cylinder head prevent efficient air compression — the most common symptom of a failing compressor head.
• Compressor knock or abnormal noise: Worn valve components, excessive carbon deposits, or a loose valve plate produce a rhythmic knocking or ticking sound from the compressor during operation.
• Oil carry-over into the air system (oil in air tanks / wet tank): A failed head gasket, cracked head, or worn valve guide allows compressor oil to enter the compressed air stream, contaminating the air system and potentially damaging the air dryer and brake valves.
• Air leak at the cylinder head joint: Visible oil/air seepage at the head-to-block interface — indicates a failed head gasket, warped sealing surface, or loose head bolts.
• Compressor not building pressure / no air output: A severely cracked head, broken valve, or blocked air passage can cause a complete loss of compression — leading to brake system air pressure loss and vehicle immobilization.
• Overheating compressor / burnt oil smell: Restricted air flow or internal damage increases compressor operating temperature, producing a burnt oil odor and accelerating component wear.

A failing air compressor cylinder head compromises the vehicle's compressed air supply, directly affecting brake system performance and safety. Slow pressure build-up delays vehicle readiness and can lead to brake drag, insufficient braking force, or automatic brake application if pressure drops below safe operating limits. Oil carry-over contaminates the air system, leading to air dryer failure and expensive downstream repairs. On a working CXZ81 heavy-duty truck, replacement at the first sign of slow pressure build-up, compressor knock, or oil carry-over is essential to maintain brake safety and avoid costly system-wide damage.

• Engine and chassis are the first checks: This cylinder head is confirmed for CXZ81 with 10PE1, with platform coverage extending to CVCXCY, CXZ/10PD1, and GIGA 10PC1. Confirm the engine code and chassis model against the vehicle documentation before ordering.
• Complete assembly scope: This is the cylinder head assembly — it includes the head casting and valve provisions. Gaskets, mounting bolts, and compressor body components are not included unless explicitly stated. Confirm the package contents at inquiry.
• Origin and quality tier vary: Supply channels offer Japan origin and China origin, with quality tiers including Original, BVP, and Aftermarket. Specify origin and quality preference at inquiry if required for the application.
• Related reference caution: The 1191100481 reference is also grouped with 1191100493 and 1191110251 in some catalogs. While related, do not assume dimensional or valve-configuration interchangeability without confirming the original unit's marking.

1. Confirm the required part first: Verify that the original unit is the compressor cylinder head and that the replacement's deck surface, valve seats, and mounting hole pattern match the compressor body. Confirm whether gaskets and bolts are included or must be sourced separately.
2. Depressurize the air system: Before servicing the compressor, drain all air from the system and disconnect the battery. Compressed air and moving engine components are hazardous.
3. Remove the old cylinder head: Disconnect the air discharge line, coolant lines (if equipped), and unloader valve connections. Unbolt the head from the compressor body in the reverse of the tightening sequence. Note the orientation of the valve plate and any gaskets.
4. Clean the mating surfaces: Remove all old gasket residue, carbon deposits, and oil film from the compressor body deck and the new head sealing surface. A clean, flat surface is essential for a leak-free seal.
5. Install the new head with new gaskets: Seat new gaskets (confirm inclusion or source separately), position the 1191100481 head assembly, and insert the mounting bolts. Tighten evenly in a cross pattern to the workshop manual specification.
6. Reconnect air and coolant lines: Reconnect the air discharge line, coolant lines, and unloader valve connections. Check for leaks before starting the engine.
7. Test operation: Start the engine and allow the air system to build pressure. Verify that the compressor reaches cut-out pressure within the specified time and that there are no air or oil leaks at the head joint. Check for abnormal noise during compressor operation.

• Inspect the compressor cylinder head and air lines at every major service or every 40,000–60,000 km — look for oil seepage, air leaks, and carbon buildup.
• Replace the air dryer filter according to the ISUZU schedule — a failed dryer allows moisture and oil to contaminate the compressor head and air system.
• Monitor air pressure build-up time — a gradual increase in build-up time is an early indicator of valve or head degradation.
• Avoid operating with a known air leak — continuous compressor cycling accelerates head and valve wear and increases oil carry-over risk.

• Standard packing: Neutral box / Color box / Customer-branded packaging — confirmed by supplier terms. Bulk export carton available.
• Package contents: 1 × Air Compressor Cylinder Head Assembly. Gaskets, mounting bolts, and valve components are NOT included unless explicitly stated — confirm exact package contents at inquiry.
• Set options: Head assembly only (standard) / head + gasket kit (where available) — specify at inquiry.
• Suitable for: ISUZU CXZ81 / 10PE1 air compressor and brake system repair shops, heavy-duty commercial truck fleet maintenance departments, diesel engine auxiliary system specialists, spare parts distributors, and export wholesalers.