Classic Austin Mini Cylinder Head Valve Stem Seal

Classic Austin Mini Cylinder Head Valve Stem Seal

Classic Austin Mini Cylinder Head Valve Stem Seal
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$0.95
Part No: ADU4905MS
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Internet Price $0.95
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Budget version of the valve stem seal.

As an engine wears, the clearance between the valve stem and guide increases; as this gets beyond tolerances the car will tend to smoke under deceleration (when you take your foot off the gas). Good valve stem seals will allow for greater wear before the smoke becomes intolerable. These late model seals actually have little springs around them to aid in the effort. It is possible, although tedious, to replace them without removing the cylinder head.

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Related Technical Articles:
Classic Mini Valve Stem seals
Created: January 15, 2014
Valve stem seals: The o-ring style seals are used on the early small bore heads, most later heads use the umbrella style. As an engine wears, the clearance between the valve stem and guide increases; as this gets beyond tolerances the car will tend to smoke under deceleration (when you take your foot off the throttle). Good valve stem seals will allow for greater wear before the smoke becomes intolerable.
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