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Thumbnail Filmstrip of 5.9|3.9 Cummins Ring and Band Style Exhaust Valve Stem Seal SBI 122-1053 Images
The SBI Exhaust Valve Stem Seal 122-1053 is a precision-engineered solution for maintaining the environmental and mechanical health of your Dodge 5.9L or 3.9L 4BT diesel engine. In a high-performance diesel environment, oil control is a delicate balancing act. While the valve stem and guide require lubrication to prevent friction and seizing, excess oil leaking into the exhaust stream leads to carbon buildup, increased emissions, and "blue smoke" issues. This Ring and Band style seal provides a "positive" fit, meaning it stays fixed to the valve guide to ensure that oil is metered with surgical precision, keeping your combustion clean and your valvetrain protected.
- Positive Style Seal Architecture: Unlike umbrella-style seals that move with the valve, this positive seal remains stationary on the guide, providing consistent, reliable oil control throughout the entire RPM range.
- Precision Oil Metering: Specifically engineered to allow a microscopic, controlled film of oil to pass through the contact lip, providing just enough lubrication to the valve stem and guide bore to prevent wear without allowing leakage.
- Ring and Band Design: Utilizes a robust ring and band retention system to ensure the seal stays securely seated on the guide, even under the high temperatures and vibrations of heavy-duty diesel operation.
- Oversize Stem Compatibility: Expertly designed for versatility; this seal can be used with standard stems or with up to 0.015" oversize valve stems, making it an ideal choice for heads that have undergone machining.
- Sold Individually: Offers the professional builder the flexibility to purchase the exact quantity needed for everything from a minor repair to a full 8-valve or 12-valve head restoration.
Choosing the 122-1053 is a proactive step toward meeting modern industry standards for engine efficiency and longevity. By managing the interface between the valve stem and the guide, this seal effectively prevents the "oil-sucking" effect that often plagues high-mileage 5.9L and 3.9L 4BT engines. Whether you are performing a routine top-end refresh or a comprehensive performance build, these SBI seals provide the specific tolerances and material integrity required for the demanding exhaust environment of a Cummins-powered engine. Investing in high-quality oil control today prevents the costly carbon-fouling and valve-guide wear issues of tomorrow.
Specifications:
- Type: Positive
- Seal O.D: 0.6900
- Style: Ring and Band
- Top Stem I.D: 0.2950
- Overall Height: 0.4930
- Bottom Seal I.D: 0.4700
- Inner Seal Height: 0.3375
- Material: Fluoroelastomer
- Nominal Stem Diameter: 8mm
- Nominal Guide O.D: 0.475-0.531
Note:
- Qty of 6 exhaust valve stem seals required for 5.9L 6BT.
- Qty of 4 exhaust valve stem seals required for 3.9L 4BT.
The SBI Exhaust Valve Stem Seal 122-1053 is a precision-engineered solution for maintaining the environmental and mechanical health of your Dodge 5.9L or 3.9L 4BT diesel engine. In a high-performance diesel environment, oil control is a delicate balancing act. While the valve stem and guide require lubrication to prevent friction and seizing, excess oil leaking into the exhaust stream leads to carbon buildup, increased emissions, and "blue smoke" issues. This Ring and Band style seal provides a "positive" fit, meaning it stays fixed to the valve guide to ensure that oil is metered with surgical precision, keeping your combustion clean and your valvetrain protected.
Positive Style Seal Architecture: Unlike umbrella-style seals that move with the valve, this positive seal remains stationary on the guide, providing consistent, reliable oil control throughout the entire RPM range.
Precision Oil Metering: Specifically engineered to allow a microscopic, controlled film of oil to pass through the contact lip, providing just enough lubrication to the valve stem and guide bore to prevent wear without allowing leakage.
Ring and Band Design: Utilizes a robust ring and band retention [...]
The SBI Exhaust Valve Stem Seal 122-1053 is a precision-engineered solution for maintaining the environmental and mechanical health of your Dodge 5.9L or 3.9L 4BT diesel engine. In a high-performance diesel environment, oil control is a delicate balancing act. While the valve stem and guide require lubrication to prevent friction and seizing, excess oil leaking into the exhaust stream leads to carbon buildup, increased emissions, and "blue smoke" issues. This Ring and Band style seal provides a "positive" fit, meaning it stays fixed to the valve guide to ensure that oil is metered with surgical precision, keeping your combustion clean and your valvetrain protected.
- Positive Style Seal Architecture: Unlike umbrella-style seals that move with the valve, this positive seal remains stationary on the guide, providing consistent, reliable oil control throughout the entire RPM range.
- Precision Oil Metering: Specifically engineered to allow a microscopic, controlled film of oil to pass through the contact lip, providing just enough lubrication to the valve stem and guide bore to prevent wear without allowing leakage.
- Ring and Band Design: Utilizes a robust ring and band retention system to ensure the seal stays securely seated on the guide, even under the high temperatures and vibrations of heavy-duty diesel operation.
- Oversize Stem Compatibility: Expertly designed for versatility; this seal can be used with standard stems or with up to 0.015" oversize valve stems, making it an ideal choice for heads that have undergone machining.
- Sold Individually: Offers the professional builder the flexibility to purchase the exact quantity needed for everything from a minor repair to a full 8-valve or 12-valve head restoration.
Choosing the 122-1053 is a proactive step toward meeting modern industry standards for engine efficiency and longevity. By managing the interface between the valve stem and the guide, this seal effectively prevents the "oil-sucking" effect that often plagues high-mileage 5.9L and 3.9L 4BT engines. Whether you are performing a routine top-end refresh or a comprehensive performance build, these SBI seals provide the specific tolerances and material integrity required for the demanding exhaust environment of a Cummins-powered engine. Investing in high-quality oil control today prevents the costly carbon-fouling and valve-guide wear issues of tomorrow.
Specifications:
- Type: Positive
- Seal O.D: 0.6900
- Style: Ring and Band
- Top Stem I.D: 0.2950
- Overall Height: 0.4930
- Bottom Seal I.D: 0.4700
- Inner Seal Height: 0.3375
- Material: Fluoroelastomer
- Nominal Stem Diameter: 8mm
- Nominal Guide O.D: 0.475-0.531
Note:
- Qty of 6 exhaust valve stem seals required for 5.9L 6BT.
- Qty of 4 exhaust valve stem seals required for 3.9L 4BT.