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Original Porsche Part 原装 Porsche 零部件 021101402
相关产品
021101417A/1
Product Information
这款原厂配套排气门导管是一款精密设计的替换式气门导管，专为保时捷914（1970-1976）风冷发动机打造。这是首款加大尺寸的排气门导管，适用于可能出现磨损或在发动机大修过程中需要加大尺寸的缸盖。
单独出售，每台发动机需要 4 个。
适用：
保时捷 914-1.7/1.8V
保时捷 914-1,8
图示编号 15
排气阀导管确保排气阀杆在运动过程中始终保持居中和对齐，从而减少横向移动，并最大限度地降低阀杆和阀座的磨损。通过平稳地引导气门并保持适当的间隙，它有助于保持发动机压缩比，降低机油消耗，并有助于提高排气效率和燃烧稳定性。此外，气门导管还有助于将热量从阀杆传导至气缸盖，从而保护部件免受过大的热应力影响。
气门导管通常单独出售；一次完整的缸盖重建通常需要四个排气门导管（每个排气门一个）。
功能
•气门对准：保持排气门直线运动，以确保气门座正确啮合和密封。
•磨损控制：减少阀杆的横向移动，否则会加速阀门和阀座的磨损。
•散热：有助于将高温排气阀杆的热量传递到气缸盖。
•重建支持：适用于已铰孔或有磨损的气缸盖的超大尺寸安装。
气门导管会因高温、摩擦和反复运动而逐渐磨损。磨损的导管会导致：
•过多的机油进入燃烧室
•压缩不良、怠速不稳或动力损失
•气门杆磨损加剧，机油消耗量增加，并出现可见的尾气烟雾
安装正确的原厂匹配气门导管可以恢复正确的气门杆对准，改善密封性和性能，并有助于延长发动机寿命，这在重建或缸盖维修期间尤为重要。
如果发现以下情况，请更换排气阀导管：
•蓝色烟雾表明燃油燃烧
•排气阀测试中压缩比低
•运转不稳或怠速质量差
•拆卸过程中发现磨损的气门杆或气门座
•在缸盖大修或气门座维修期间
相关参考编号
相关编号、被取代编号、交叉引用编号或替代编号，供比较之用。
021101417A
您正在查看的产品与这些编号存在交叉引用关系
Product Information
排气阀导管。出口，第一超尺寸这款原厂配套排气门导管是一款精密设计的替换式气门导管，专为保时捷914（1970-1976）风冷发动机打造。这是首款加大尺寸的排气门导管，适用于可能出现磨损或在发动机大修过程中需要加大尺寸的缸盖。
单独出售，每台发动机需要 4 个。
适用：
保时捷 914-1.7/1.8V
保时捷 914-1,8
图示编号 15
排气阀导管确保排气阀杆在运动过程中始终保持居中和对齐，从而减少横向移动，并最大限度地降低阀杆和阀座的磨损。通过平稳地引导气门并保持适当的间隙，它有助于保持发动机压缩比，降低机油消耗，并有助于提高排气效率和燃烧稳定性。此外，气门导管还有助于将热量从阀杆传导至气缸盖，从而保护部件免受过大的热应力影响。
气门导管通常单独出售；一次完整的缸盖重建通常需要四个排气门导管（每个排气门一个）。
功能
•气门对准：保持排气门直线运动，以确保气门座正确啮合和密封。
•磨损控制：减少阀杆的横向移动，否则会加速阀门和阀座的磨损。
•散热：有助于将高温排气阀杆的热量传递到气缸盖。
•重建支持：适用于已铰孔或有磨损的气缸盖的超大尺寸安装。
气门导管会因高温、摩擦和反复运动而逐渐磨损。磨损的导管会导致：
•过多的机油进入燃烧室
•压缩不良、怠速不稳或动力损失
•气门杆磨损加剧，机油消耗量增加，并出现可见的尾气烟雾
安装正确的原厂匹配气门导管可以恢复正确的气门杆对准，改善密封性和性能，并有助于延长发动机寿命，这在重建或缸盖维修期间尤为重要。
如果发现以下情况，请更换排气阀导管：
•蓝色烟雾表明燃油燃烧
•排气阀测试中压缩比低
•运转不稳或怠速质量差
•拆卸过程中发现磨损的气门杆或气门座
•在缸盖大修或气门座维修期间
相关参考编号
相关编号、被取代编号、交叉引用编号或替代编号，供比较之用。
021101417A
021101417A
您正在查看的产品与这些编号存在交叉引用关系
产品车辆组
产品车辆组
- Porsche 914 (1970-1976)
价格: €16.18
可订购 - 28 到 42 天
安全购物
12 个月保修
全球交付
021101417A/1KIT
Product Information
This is a set of four OE Match exhaust valve guides engineered to replace the worn or original guides in the Porsche 914 air-cooled engine. This is a first-oversize exhaust guide intended to fit cylinder heads that may have experienced wear or require an oversize fit during an engine rebuild. Supplied as a complete set of 4, this kit is ideal for a full cylinder head rebuild or valve job.
SET OF 4
Fits:
Porsche 914-1,7/1,8V
Porsche 914-1,8
Diagram ref no 15
Exhaust valve guides serve several key functions in the overhead valve train:
• Support and align the exhaust valve stems, ensuring they travel straight within the head.
• Maintain correct clearances between the valve stem and guide for proper sealing and combustion efficiency.
• Help transfer heat away from the hot exhaust valve stem into the cylinder head casting.
• Protect valve stems and seats from wear due to excessive lateral movement.
This set of four valve guides ensures that all exhaust valves on the 914’s four-cylinder engine have correct, matched guidance for dependable operation.
This OE Match set matches Porsche factory dimensions and is ideal for full head rebuilds, valve seat replacements or anytime guides show wear.
Function
• Valve Alignment: Keeps the exhaust valve traveling straight for proper valve seat engagement and sealing.
• Wear Control: Reduces lateral valve stem movement that would otherwise accelerate wear on the valve and seat.
• Heat Dissipation: Helps carry heat from the hot exhaust valve stem into the cylinder head.
• Rebuild Support: Oversize fit for cylinder heads that have been reamed or show wear.
Valve guides wear over time due to high heat, friction, and repeated motion. Worn guides can result in:
• Excessive oil entering the combustion chamber
• Poor compression, rough idle or power loss
• Increased valve stem wear Higher oil consumption and visible exhaust smoke
Installing a correct OE Match valve guide restores proper valve stem alignment, improves sealing and performance, and supports a longer engine life especially crucial during a rebuild or head service.
Replace the exhaust valve guide if you notice:
• Blue smoke indicating oil burning
• Low compression in exhaust valve tests
• Rough running or poor idle quality
• Worn valve stems or seats seen during teardown
• During head rebuild or valve seat work
相关参考编号
相关编号、被取代编号、交叉引用编号或替代编号，供比较之用。
021101417A
您正在查看的产品与这些编号存在交叉引用关系
Product Information
Exhaust valve guide set. Outlet, 1st OversizeThis is a set of four OE Match exhaust valve guides engineered to replace the worn or original guides in the Porsche 914 air-cooled engine. This is a first-oversize exhaust guide intended to fit cylinder heads that may have experienced wear or require an oversize fit during an engine rebuild. Supplied as a complete set of 4, this kit is ideal for a full cylinder head rebuild or valve job.
SET OF 4
Fits:
Porsche 914-1,7/1,8V
Porsche 914-1,8
Diagram ref no 15
Exhaust valve guides serve several key functions in the overhead valve train:
• Support and align the exhaust valve stems, ensuring they travel straight within the head.
• Maintain correct clearances between the valve stem and guide for proper sealing and combustion efficiency.
• Help transfer heat away from the hot exhaust valve stem into the cylinder head casting.
• Protect valve stems and seats from wear due to excessive lateral movement.
This set of four valve guides ensures that all exhaust valves on the 914’s four-cylinder engine have correct, matched guidance for dependable operation.
This OE Match set matches Porsche factory dimensions and is ideal for full head rebuilds, valve seat replacements or anytime guides show wear.
Function
• Valve Alignment: Keeps the exhaust valve traveling straight for proper valve seat engagement and sealing.
• Wear Control: Reduces lateral valve stem movement that would otherwise accelerate wear on the valve and seat.
• Heat Dissipation: Helps carry heat from the hot exhaust valve stem into the cylinder head.
• Rebuild Support: Oversize fit for cylinder heads that have been reamed or show wear.
Valve guides wear over time due to high heat, friction, and repeated motion. Worn guides can result in:
• Excessive oil entering the combustion chamber
• Poor compression, rough idle or power loss
• Increased valve stem wear Higher oil consumption and visible exhaust smoke
Installing a correct OE Match valve guide restores proper valve stem alignment, improves sealing and performance, and supports a longer engine life especially crucial during a rebuild or head service.
Replace the exhaust valve guide if you notice:
• Blue smoke indicating oil burning
• Low compression in exhaust valve tests
• Rough running or poor idle quality
• Worn valve stems or seats seen during teardown
• During head rebuild or valve seat work
相关参考编号
相关编号、被取代编号、交叉引用编号或替代编号，供比较之用。
021101417A
021101417A
您正在查看的产品与这些编号存在交叉引用关系
关于此套件
该套件包括以下商品:
1 x 排气阀导管，出气口。保时捷 914 (021101417A/1)
产品车辆组
产品车辆组
- Porsche 914 (1970-1976)
价格: €16.18
可订购 - 28 到 42 天
