Thin-walled valve guide insert and method for installing same within a cylinder head construction
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United States of America Patent
Stats
-
Nov 19, 2002
Grant Date -
N/A
app pub date -
Mar 31, 2000
filing date -
Mar 31, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A valve guide insert for lining and relining a valve guide bore in an internal combustion engine, where the internal combustion engine includes a valve with a valve stem, and the valve guide bore is configured to support the valve stem for reciprocal motion. The valve guide insert includes a thin-walled, cylindrically shaped, metallic tube made from reformable bearing material suitable for slidably supporting a valve stem in a combustion engine, wherein the tube has a temporary retainer section and a long section. The retainer section defined a first outer diameter, and the long section defines a second outer diameter that is less than the first outer diameter, whereby the tube is configured to be dropped into a valve guide bore having a bore diameter less than the first outer diameter but greater than the second outer diameter. The valve guide insert may have a wall thickness of 0.008 inches or less.
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