Methods for tightening suspension after bushing install - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 05-07-2010, 10:16 AM   #1
Elite Member
Thread Starter
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default Methods for tightening suspension after bushing install

I've read a few threads that say it is imperative that you tighten the suspension components with the car sitting at normal suspension load.

Obviously the problem is that the miata sits very low to the ground and you can' get under the car the wheels are directly on the ground.

I've heard of using a lift (I don't have one), 6x6 post at all four corners (seems a little dangerous), 4 ramps (best I've heard, but I don't have and , and don't want to pay $70 bucks for a set)

My idea: While car is on jackstands (all four corners), use a floor jack to raise one corner to the expected hub to fender ride height. Then tighten the suspension on that corner. This sounds reasonable to me. It also works to compress the shock and spring to install shock at same time. Are there any problems with this method?
miatauser884 is offline   Reply With Quote
Old 05-07-2010, 11:56 AM   #2
Elite Member
iTrader: (30)
 
Join Date: Aug 2007
Location: Va Beach
Posts: 7,282
Total Cats: 0
Default

Quote:
Originally Posted by djp0623 View Post
My idea: While car is on jackstands (all four corners), use a floor jack to raise one corner to the expected hub to fender ride height. Then tighten the suspension on that corner. This sounds reasonable to me. It also works to compress the shock and spring to install shock at same time. Are there any problems with this method?

That is what I have always done. Don't see any reason why it isn't good enough.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
levnubhin is offline   Reply With Quote
Old 05-07-2010, 12:34 PM   #3
Elite Member
Thread Starter
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

Good man, that is what I want to hear.

Your sig, Where is that hose goign that is coming of of the intake pipe? Does it go to the valve cover?
miatauser884 is offline   Reply With Quote
Old 05-07-2010, 01:10 PM   #4
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

I also have used "jack to ride height". I don't know if you put in factory or aftermarket PU bushings. I was under the impression that it isn't required if installing Energy Suspension bushings as they aren't bonded to the metal parts so they won't preload like a factory bushing. It makes sense to me.

I'd still do the "jack to ride height" as you have to torque the lower shock mount anyway and it is a bonded bushing.
Stein is offline   Reply With Quote
Old 05-07-2010, 01:23 PM   #5
Elite Member
Thread Starter
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

Quote:
Originally Posted by Stein View Post
I also have used "jack to ride height". I don't know if you put in factory or aftermarket PU bushings. I was under the impression that it isn't required if installing Energy Suspension bushings as they aren't bonded to the metal parts so they won't preload like a factory bushing. It makes sense to me.

I'd still do the "jack to ride height" as you have to torque the lower shock mount anyway and it is a bonded bushing.
The non-bonding issue eliminating the need to preload the suspension makes sense. However, The few extra minutes it will take to preload each corner (especially since I have to do it anyway to install the shock/spring), I'd rather be safe than sorry.
miatauser884 is offline   Reply With Quote
Old 05-07-2010, 01:41 PM   #6
I'm a terrible person
iTrader: (19)
 
FRT_Fun's Avatar
 
Join Date: Apr 2009
Location: Arizona
Posts: 7,293
Total Cats: 180
Default

For free what you mentioned is probably best. I had wood lying around so I slid a few 2x8s under the wheels to give clearance.

FRT_Fun is offline   Reply With Quote
Old 05-07-2010, 04:19 PM   #7
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

Find a friend with an allignment lift. :-P Build a pit in my garage, and I'll let you use it.


Really, the poly bushings are SUPER slippery. I did it on a lift, and I could move the wheels freely with my hand. There was NO binding. And it felt ENTIRELY different on the street. I'm not even sure I like it.

So yes, it's totally overkill, just tighten it and go. Don't scrimp on grease.
AbeFM is offline   Reply With Quote
Old 05-08-2010, 12:22 AM   #8
Elite Member
Thread Starter
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

Thanks for the replies.

Maybe you can give an opinion on this. I had one bad upper ball joint boot so I replaced it with a poly boot. Much stiffer than the rubber. Do you think it is ok to have one side rubber and the other poly? I'm concerned about the effects on handling. My gut says it should be fine, but I have no experience with this.

Thanks again
miatauser884 is offline   Reply With Quote
Old 05-08-2010, 02:59 AM   #9
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

From a stiffness point of view it would be fine. Myself, if I have a torn boot I replace the joint. Who knows how much crud got in there. I'm replacing the lowers and tie rod ends on my V8 99 with only 80K on it just becuase the boots were torn.
Stein is offline   Reply With Quote
Old 05-08-2010, 02:40 PM   #10
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

It's pretty hard to imagine a scenario where not symmetric was good. But it's just a gut feeling as well. Odds are good new ball joints wouldn't hurt, the friction of a sandy joint WOULD be annoying.
AbeFM is offline   Reply With Quote
Old 05-08-2010, 06:32 PM   #11
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,325
Total Cats: 1,923
Default

Funny the timing here. I'm changing out the hubs and lower BJs today in the 90, and cleaning / re-packing the uppers. Got the right side finished and came in for a quick break. The upper on that side did, sadly, exhibit a bit of play once the boot was off and it was cleaned up. Didn't somebody once post a link to someplace that was able to rebuild them cheap? A new pair of upper arms represents about 1/4 of the total value of this car.
Joe Perez is online now   Reply With Quote
Old 05-09-2010, 12:09 PM   #12
Newb
 
Join Date: Apr 2010
Location: tokyo
Posts: 38
Total Cats: 0
Default

i normally use cinder blocks. gives me enough room to set the car on them, then tighten needed bolts/nuts
GrantWilson is offline   Reply With Quote
Old 05-10-2010, 09:22 AM   #13
Elite Member
iTrader: (2)
 
fooger03's Avatar
 
Join Date: Jan 2009
Location: Columbus, OH
Posts: 4,132
Total Cats: 187
Default

Quote:
Originally Posted by GrantWilson View Post
i normally use cinder blocks. gives me enough room to set the car on them, then tighten needed bolts/nuts
if you're using cinder blocks, make sure you've got jack stands waiting under the jack seam. Cinder blocks have a tendancy to collapse under a high pressure load.
fooger03 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 58 12-13-2017 10:04 PM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
Walbro 255lph Fuel Pump $50 lsc224 Miata parts for sale/trade 2 10-01-2015 10:17 AM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:19 PM.