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2011-2014 Mustangs
2011-2014 Mustang Talk
Car is dangerous to drive...Need Pointers!!!
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<blockquote data-quote="5lho" data-source="post: 14807787" data-attributes="member: 134994"><p>This is a big risk with fluted poly bushings that are greaseable. Fluted bushings are at greater risk because the flutes offer a place for a stress fracture to start. At least everyone uses petro-resistant poly now so all the old problems with end users using petro grease and dissolving the poly are solved, either by the manufacturer, or people getting smarter and using non-petro grease. I've seen lots of instances of people hydroing poly bushings. It doesn't take a lot; frankly, I think two full strokes of the grease gun is too much, whatever the instructions say. What I do is grease the bushing off the vehicle, wipe the excess pump-out off and good to go. </p><p></p><p>There is a reason OEM manufacturers don't use poly much in factory fit stuff. It usually won't QC long term like a good elastomer rubber bushing and they tend to fail catastrophically, like you see here. Elastomer just tends to slowly get softer over time, thus giving plenty of warning of distress and prompting the owner to get it repaired.</p></blockquote><p></p>
[QUOTE="5lho, post: 14807787, member: 134994"] This is a big risk with fluted poly bushings that are greaseable. Fluted bushings are at greater risk because the flutes offer a place for a stress fracture to start. At least everyone uses petro-resistant poly now so all the old problems with end users using petro grease and dissolving the poly are solved, either by the manufacturer, or people getting smarter and using non-petro grease. I've seen lots of instances of people hydroing poly bushings. It doesn't take a lot; frankly, I think two full strokes of the grease gun is too much, whatever the instructions say. What I do is grease the bushing off the vehicle, wipe the excess pump-out off and good to go. There is a reason OEM manufacturers don't use poly much in factory fit stuff. It usually won't QC long term like a good elastomer rubber bushing and they tend to fail catastrophically, like you see here. Elastomer just tends to slowly get softer over time, thus giving plenty of warning of distress and prompting the owner to get it repaired. [/QUOTE]
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2011-2014 Mustang Talk
Car is dangerous to drive...Need Pointers!!!
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