Sean Burke Sean Burke Senior Moderator Location: Butler,Pennsylvania Join Date: 08/21/2010 Age: Midlife Crisis Posts: 123 Rally Car: 1991 Honda CRX |
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john vanlandingham John Vanlandingham Senior Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
First you disassemble them, and remove the bearing....reassemble in reverse order. John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
PotatoFlakeSTi Joachim Sandgaard Ultra Moderator Location: New Jersey Join Date: 10/17/2011 Age: Midlife Crisis Posts: 52 Rally Car: 1990 Eagle Talon TSi AWD |
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john vanlandingham John Vanlandingham Senior Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Joking aside, boys, OK. Everything I have seen out of Asia for aftermarket top mounts come with really undersized spherical bearings period.
Wgen I was collecting Ford 909 Motorsports parts way back when, first thing I did was look at differences between "GpN" (standard road car stuff in design) and Group A and World RallyCar stuff and measured everything. The most obvious was the tops of the strut insert: ![]() The fat pin is 20mm on the Group A and the threaded part is M12 x 1.5 (keeping this relevant to those Sub-a-rat things before you guys bitch me out about "what da fawk duz dis haz to do wif my beloved Impretzled?? or your attention span peters out, note that your pins are 15mm where the top mount bearing fits and M12 thread---and Group A Subies had in the mid 90s a 19mm fat pin like the Fords--which was hollow inside saveing a whopping 8 grams)(ask how we found that out!) Ford used a 22mm high-misalignment bearing that looks like this> ![]() Typically I see the generic Japoniasie (and other Asian stuff probably made in China) stuff around 15-16mm and I say its undersized Strength of round things goes like radius squared to the 4th power, so a couple of mm is a tremendous increase in strength--that's why i say go up to M14 wheel studs--. Anyway don't belive me, but look up what Subaru just homologated in GroupN for the new Sucus: (can't find it dammit, but what i saw just 2 weeks ago was new Homologated sperical bearing top mounts... And the ID was....... WAS...................................................... WAS 22mm. You boys oughtter study the mounts and see if there was a way to get them modded up to what some smrat guys have decided is the right size... Oh, 22mm in mythical kings segment of his thumb is 0.866 7/8" is .875 And 7/8" costs a lot less than 22mm Oh, found it: http://www.sti.jp/e/competitor/r4_homologation/data/2011/n5738/N5738_0301_VR4.pdf We don't have to be tooo smart and heaven forbid that anybody should ever accuse me of being smrat, but I am astute enough to learn from those with a lot more resources and more riding on their decisions... You guys came get smart, too. John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
Anders Green Anders Green Professional Moderator Location: Raleigh, NC Join Date: 03/30/2006 Age: Possibly Wise Posts: 1,478 Rally Car: Parked |
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mothra Matt Smith Ultra Moderator Location: Wilmington NC Join Date: 03/31/2006 Age: Possibly Wise Posts: 546 Rally Car: xr4ti |
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wvonkessler Wilson von Kessler Ultra Moderator Location: Lookout Mountain, GA Join Date: 02/28/2006 Age: Possibly Wise Posts: 1,127 Rally Car: Colts are in Finland; now '87 325i, '89 325i |
Hey John, you are way off message here.
"Talk about drugs. Driving a car like that, going that fast, it’s like all the drugs at once." - Tommy Byrne "Now, Pinky, if by any chance you are captured during this mission, remember you are Gunther Heindriksen from Appenzell. You moved to Grindelwald to drive the cog train to Murren. Can you repeat that?" - The Brain |
john vanlandingham John Vanlandingham Senior Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Uh, say what? Dey wanna rebuild their top mounts, then rebuild them to the right size, that sounds like a better message, dun' it? John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
Sean Burke Sean Burke Senior Moderator Location: Butler,Pennsylvania Join Date: 08/21/2010 Age: Midlife Crisis Posts: 123 Rally Car: 1991 Honda CRX |
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PotatoFlakeSTi Joachim Sandgaard Ultra Moderator Location: New Jersey Join Date: 10/17/2011 Age: Midlife Crisis Posts: 52 Rally Car: 1990 Eagle Talon TSi AWD |
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Tim Taylor Tim Taylor Junior Moderator Location: Oakland, CA Join Date: 02/02/2007 Age: Possibly Wise Posts: 622 Rally Car: Mazda 323 GTX |
There are only a couple of ways to mount spherical bearings. Cheapest it to just press them in from the bottom, next would be some sort of retaining ring, most expensive is some sort of threaded retainer. I've never seen what you're working on but my money is on a press fit. Find a socket that matches the bearing size and use the inertia press (aka hit it with a hammer) Maybe a picture of the hobbit in question would help ![]() |
john vanlandingham John Vanlandingham Senior Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
The shaft may be 22---you have it right there, maybe you could measure. But the bearing ID who knows.... Seems like nobody can get an answer..... maybe you could measure that too. If you don't have these: ![]() Get some. Then you can measure the ID, OD and width. and, who's yelling? ![]() John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
john vanlandingham John Vanlandingham Senior Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Are you seriously acting like you have been scolded? The subject is the bearing needing replacement.. Phrase it like this "The Hotbits bearings........" then you won't feel the subject is you and "my"... But aren't you glad that there may be a way to really improve the stuff?? John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
Nubby Tony Wells Professional Moderator Location: Omaha, NE Join Date: 07/08/2008 Age: Possibly Wise Posts: 191 Rally Car: SP Evo IX #112 |
Yeah, I've replaced one.
The top mount is in two pieces held together with little allen screws, so first break the top mount into two parts. The spherical bearing will drop out the bottom and what I did was find an appropriate sized socket and used it to tap out the bearing. Did the same thing to put in the new bearing, just used a socket that matched up to the race and used it to tap it in. They're press fit in there, but not super duper tight so they go in and out fairly easily. I got the replacement bearings from Davenport Racing and I remember Doug saying something about trying to find a domestic source for the replacements and the new ones seem to be of better quality. A couple years of RallyX on a pretty rough site killed that first bearing, only one stage rally on the new one but it's still in one piece. |
EricW Eric Wages Elite Moderator Location: Goose Creek, SC Join Date: 12/09/2008 Age: Midlife Crisis Posts: 280 Rally Car: 2002 WRX |
That's a good point - any guess on how many events these bearings should hold up? I just put in new rear mounts because I bent the GrpN mounts with my hit at Black River and I'm curious what I'm going to need to do to service these and what timeframe I'm looking at?
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