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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.

Valve Stem Seal Cup-type with Spring Value Line | Classic Mini | Sprite & MG Midget | Morris Minor

Valve Stem Seal Cup-type with Spring Value Line | Classic Mini | Sprite & MG Midget | Morris Minor

Valve Stem Seal Cup-type with Spring Value Line | Classic Mini | Sprite & MG Midget | Morris Minor
Part No: ADU4905MS
$0.48
Qty:
Fits the following:
Classic Mini
Sprite & MG Midget
Morris Minor
Alternate Products
Valve Stem Seal Cup-type with Spring | Classic Mini | Sprite & MG Midget | Morris Minor
$1.13 Valve Stem Seal Cup-type with Spring | Classic Mini | Sprite & MG Midget | Morris Minor
Valve Stem Seal Late MPi-type Viton | Classic Mini | Sprite & MG Midget | Morris Minor
$3.03 Valve Stem Seal Late MPi-type Viton | Classic Mini | Sprite & MG Midget | Morris Minor

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 are a critical part of rebuilding a vintage cylinder head such as for the Classic Mini Cooper