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ISUZU Valve Guide 1117210011 1-11721001-1 for CVR 6RB1
The ISUZU Valve Guide with OEM numbers 1117210011 / 1-11721001-1 is a precision-engineered replacement designed for ISUZU CVR series heavy-duty trucks and 6RB1 diesel engines. This component is a core part of the engine valve train, pressed into the cylinder head to provide precise guidance and support for the valve stem, ensuring accurate reciproing motion of intake and exhaust valves.
Numbering Note: This product number is 1-11721001-1 / 1117210011. The series also includes 1-11721001-0 / 1117210010 and 1-11721001-6 / 1117210016. Some sources also indie compatibility with Hitachi EX400 series excavators. Please verify the specific number based on actual vehicle or equipment configuration.
Working Principle
The valve guide is a precision tubular component press-fitted into the cylinder head, with the valve stem reciproing within its bore. Its core functions include:
Precise Guidance: Ensures the valve moves along the correct axis, allowing the valve head to seat precisely against the valve seat for perfect sealing.
Heat Dissipation: Transfers high-temperature heat from the valve head through the valve stem to the cylinder head, where it is carried away by the cooling system to prevent valve overheating and burning.
Wear Protection: Acts as a sacrificial component, absorbing the reciproing friction of the valve stem to protect the expensive cylinder head from wear.
Lubriion & Sealing: The bore retains a small amount of oil to lubrie the valve stem-to-guide interface, reducing friction resistance.
Failure Symptoms
Inspect immediately if any of these occur:
Symptom
Probable Cause
Significantly increased oil consumption; blue smoke from exhaust
Valve train noise ("ticking" sound) during operation
Worn guide causing valve stem to deviate from proper seating
Uneven valve stem wear or heavy carbon deposits found during cylinder head disassembly
Worn guide or poor lubriion causing abnormal stem wear
Product Specifiions
Net Weight
0.080 kg
HS Code
840999100
Material
Gray Cast Iron
Certifiion
CE certified
Quality
100% tested
Warranty
1 year
Compatible Engine
ISUZU 6RB1 diesel engine
Compatible Model
ISUZU CVR series heavy-duty trucks
Condition
Brand New — 100% quality inspected
Minimum Order Quantity
5 pieces
Delivery Time
5–8 working days
Supply Capacity
10000 sets/month
Data Source Note: Net weight, HS code, material, and certifiion data above are based on publicly available product information and general industry standards. Test reports available upon request.
Vehicle & Engine Compatibility
Brand
Model Series
Compatible Engine
Notes
ISUZU
CVR
6RB1
Heavy-duty truck
ISUZU
CXZ / CXM
10PE1, 10PD1, 10PC1, 6WF1
Heavy-duty truck
ISUZU
CYZ / CYH
6WF1, 6WA1
Heavy-duty truck
ISUZU
EXZ
6WG1
Heavy-duty truck
Hitachi
EX400, EX400-3, EX400-5
6RB1
Excavator
Hitachi
LS580
6RB1
Excavator
Hitachi
SH450-2
6RB1
Excavator
Extended Compatibility Note: This product is primarily designed for ISUZU CVR / 6RB1. The same-series number 1-11721001-0 / 1117210010 is also applicable to 6RB1 EX400 appliions. A related number 5-11721001-1 / 5117210011 fits ISUZU 4BG1, 4BD1 engines. Please verify the engine model and chassis/equipment code on the nameplate before ordering.
Important Fitment Warnings
Number Confirmation: This product number is 1-11721001-1 / 1117210011. The series also includes 1-11721001-0 / 1117210010 and 1-11721001-6 / 1117210016. Verify the specific number on the original part before ordering.
Intake & Exhaust Universal: This valve guide is typically universal for intake and exhaust valves. Confirm with the engine workshop manual.
Associated Components: When replacing valve guides, it is recommended to replace valve stem seals simultaneously and check valve stem-to-guide clearance.
Installation Method: Valve guides are installed with an interference fit — use a special pressing tool to remove old guides and press in new ones. DO NOT use a hammer to avoid damaging the guide or cylinder head.
Post-Installation Reaming: After pressing in, the guide bore may deform slightly — use a valve guide reamer to achieve the correct stem-to-guide clearance.
Professional Installation: Valve guide replacement is a core engine overhaul procedure requiring cylinder head disassembly — must be performed by a qualified engine repair technician.
Features & Benefits
High-Quality Gray Cast Iron Material
Excellent wear resistance, thermal conductivity, and vibration damping for long-term reliable operation under high-temperature, high-frequency reciproing conditions.
Precision-Machined Dimensions
Ensures precise valve stem-to-guide fit for perfect sealing — effectively prevents oil from entering combustion chamber; reduces oil consumption; improves engine power performance.
CE Certified & 100% Tested
Internationally recognized quality certifiion ensuring full-process quality control from design to production — 100% tested on every piece.
Broad OEM Cross-Compatibility
Replaces OEM numbers 1-11721001-1 / 1117210011; compatible with 1-11721001-0, 1-11721001-6 and other numbers — fits multiple ISUZU models and Hitachi EX400 series excavators.
Flexible Supply
MOQ 5 pieces, delivery 5–8 working days, supply capacity 10000 sets/month — meets diverse procurement needs.
Quality Control & Verifiion
QC Item
Inspection Method
Acceptance Criterion
Frequency
Inner diameter
Bore gauge / Air gauge
7.02 mm ± tolerance
100%
Outer diameter
Micrometer
11.54 mm ± tolerance
100%
Length
Calipers / Height gauge
43 mm ± tolerance
100%
Bore surface roughness
Roughness tester
Per ISO standard
Batch sampling
Material composition
Spectrometer
Per gray cast iron standard
Batch sampling
Material hardness
Brinell/Rockwell tester
Standard hardness range
Batch sampling
Visual inspection
Visual
No casting defects, burrs, or rust
100%
100% function test
Special inspection equipment
100% tested
100%
CE certifiion audit
Third-party certifiion body
Per CE standard
Periodic audit
Installation & Maintenance Recommendations
IMPORTANT SAFETY NOTICE: Valve guide replacement is a core engine overhaul procedure requiring complete cylinder head disassembly and reassembly. Must be performed by a qualified engine repair technician. Improper operation may cause serious engine damage.
Preparation: Confirm engine model (6RB1) and part number (1-11721001-1). Prepare tools: Valve guide press/removal tool, valve guide reamer, bore gauge, torque wrench.
Removing Old Valve Guide: Remove engine and cylinder head. Use special valve guide puller to extract old guide. Clean cylinder head guide bore and measure bore diameter.
Installing New Valve Guide: Inspect new guide. Measure fit dimensions. Press new guide evenly into cylinder head bore. Ream guide bore to correct size. Clean thoroughly. Measure clearance. Install valve stem seals.
Post-Installation Checks: Valve seal check, valve movement check, post-engine assembly test.
Packaging & Supply
Packaging
Neutral packaging or customized per customer request
Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...
