Pilot bearing and bushings
(→Bushings: Minor clean up; add text; format images) |
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===Bushings=== | ===Bushings=== | ||
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| + | [[File:Sintered pilot bushing.jpg|thumb|200px|Sintered oilite-type bushing. GM p/n 3752487 or Doorman p/n 690-014 are similar to this]] | ||
"Good" pilot bushings that GM and the good NAPA bushing is an oilite made of sintered bronze. If a magnet is attracted to it, this indicated an iron content- which isn't recommended in many cases. | "Good" pilot bushings that GM and the good NAPA bushing is an oilite made of sintered bronze. If a magnet is attracted to it, this indicated an iron content- which isn't recommended in many cases. | ||
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An oilite bushing contains all the oil that the material can "soak up" already. The amount of pressure that's used when it is sintered will determine how much porosity- and how much oil it can absorb. Different applications will have different properties. | An oilite bushing contains all the oil that the material can "soak up" already. The amount of pressure that's used when it is sintered will determine how much porosity- and how much oil it can absorb. Different applications will have different properties. | ||
| − | Adding additional lube other than a slight amount as an installation aid isn't recommended and will serve only to attract/collect debris coming from the clutch and clutch plate, dirt, etc. An oil-bearing material like oilite has all the lube it needs already incorporated into the material itself, anything additional is | + | Adding additional lube other than a slight amount as an installation aid isn't recommended and will serve only to attract/collect debris coming from the clutch and clutch plate, dirt, etc. An oil-bearing material like oilite has all the lube it needs already incorporated into the material itself, anything additional is not needed. <br style="clear:both"/> |
====Fluted bushings==== | ====Fluted bushings==== | ||
| − | [[File:GM pn 10125896 pilot bushing.jpg]] | + | [[File:GM pn 10125896 pilot bushing.jpg|thumb|200px|]] |
| − | The flutes | + | The flutes reduce the load bearing capacity- even though there's not a terrific amount of load on the pilot bushing- provided the bellhousing is indexed correctly. They also present a way for contaminants to get into the bushing. |
==Damage caused by a pilot bushing containing iron == | ==Damage caused by a pilot bushing containing iron == | ||
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