 Trailing arm bushing removal |
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| mwizard1 |
 Nov 8 2024, 08:15 PM
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#1
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Newbie  Group: Members Posts: 22 Joined: 25-May 24 From: N San Diego Co Member No.: 28,148 Region Association: None  |
Making good progress on my upgrade to 5 bolt 911 parts, but... I also want to change the OEM rubber bushings on the rear trailing arms to delron. Any tips for getting the old rubber bushings out?
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| technicalninja |
Nov 10 2024, 11:57 AM
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#2
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Advanced Member Group: Members Posts: 2,000 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region 
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Looking back through your posts gave me "autocross".
What are your uses for the car? Is it going to be competition only and trailered to each event? Suspension set up is different for "combat" use. The ID of the bushing bores in the original trailing arms might not be concentric. Those RSR setups are cool but require JB welding into the trailing arms. Properly centering those will be critical and there is NO going back with that style. I bought a set of 911 front control arms with the Elephant Poly-Bronze kit already installed. Those require JB welding a sleeve on the control arms and there is no going back with that kit either. If I was trying to install Delron bushings in a stock trailing arm I'd WANT them undersize to allow final sizing after installation. That might be a PIA... Autocrossing usually creates more side loading and faster transient movements (change g-force directions more often) than any other type of competition. Hardening suspension compliance always induces higher forces into the suspension mount points. Autocrossing induces MUCH higher forces as well. By the time I was going to Delron all of my suspension mount points would be significantly strengthened. Your 914 had ALL of its suspension points spot welded a half a century ago... What do your suspension mounts look like? How do your "hell hole" and longs look. What's the rust "quotient" on the car? |
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| mwizard1 |
Nov 14 2024, 11:46 AM
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#3
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Newbie Group: Members Posts: 22 Joined: 25-May 24 From: N San Diego Co Member No.: 28,148 Region Association: None |
QUOTE(technicalninja @ Nov 10 2024, 09:57 AM)  Looking back through your posts gave me "autocross". What are your uses for the car? Is it going to be competition only and trailered to each event? Suspension set up is different for "combat" use. The ID of the bushing bores in the original trailing arms might not be concentric. Those RSR setups are cool but require JB welding into the trailing arms. Properly centering those will be critical and there is NO going back with that style. I bought a set of 911 front control arms with the Elephant Poly-Bronze kit already installed. Those require JB welding a sleeve on the control arms and there is no going back with that kit either. If I was trying to install Delron bushings in a stock trailing arm I'd WANT them undersize to allow final sizing after installation. That might be a PIA... Autocrossing usually creates more side loading and faster transient movements (change g-force directions more often) than any other type of competition. Hardening suspension compliance always induces higher forces into the suspension mount points. Autocrossing induces MUCH higher forces as well. By the time I was going to Delron all of my suspension mount points would be significantly strengthened. Your 914 had ALL of its suspension points spot welded a half a century ago... What do your suspension mounts look like? How do your "hell hole" and longs look. What's the rust "quotient" on the car? Yes, 914s are a tin can. I have added 12 reinforcing "plates" to the rear around the suspension. Also added about 2 sqft of material to repair rust . |
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Posts in this topic
mwizard1 Trailing arm bushing removal Nov 8 2024, 08:15 PM
brant Original bushings are vulcanized in
Aftermarket c... Nov 9 2024, 09:02 AM
mwizard1
Original bushings are vulcanized in
Aftermarket ... Nov 9 2024, 09:12 AM brant Mine are Mueller bearings from long ago
But check... Nov 9 2024, 11:10 AM mwizard1
Mine are Mueller bearings from long ago
But chec... Nov 10 2024, 09:41 AM mwizard1
Mine are Mueller bearings from long ago
But che... Nov 11 2024, 09:59 AM brant Just reread that your question is for rear bushing... Nov 9 2024, 11:24 AM technicalninja I'm surprised no-one has chimed in about the u... Nov 9 2024, 12:02 PM technicalninja Stolen from the Elephant racing web site. Pretty g... Nov 9 2024, 12:13 PM rjames Another option and one I’ll likely go with:
http... Nov 10 2024, 10:54 AM mepstein To remove, I heat the outside with a torch until I... Nov 11 2024, 10:04 AM |
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