I just bought an '88 navara and the front end is riding rather low. a mechanic told me i just needed to wind up the torsion bars. I've just had a look and it seems that one is wound right up and the other nowhere near as much. Should i go ahead and wind the othe one up until they are equal?
Yes, wind the pair up so the front end is sitting at the same height both left & right, usually 10mm lower than the rear, use the sil of the vehicle as a measure against the ground.
You will need a 22mm high impact socket with an air gun, use plenty lubricant on the threads as they get very hot when winding them up and down. before you wind the nuts up take the load off the bars to make it easier.
some times you may need to remove the whole torsion bar and turn within the splines to gain more height as they can loose there tension over a peroid of time.
don't forget to do a wheel alignement afterwards as this will cause a change in measurements.
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to remove lower control arm bushings you need to remove control arm from vechicle have control arm bushings pressed out.you need to remove disconnect torsion bar,remove shock absorber,disconnect stabilizer bar link, remove axle half shaft, remove the lower ball joint, remove control arm mounting bolts, then remove lower control arm.
Aint much to a torsion bar, it has 2 identicle ends. Both ends are hexigon shaped. And only one adjustable screw, one for each side. Tighten it, and it will raise the front of your vehicle, loosen it, and it lowers the front of your vehicle. All torsion bars are not equal, so a set amount of turns to adjust is not a fix all solution. Mine is 10-1/2 turns from first thread contact, but, you need about a 1/2 inch of clearance from lower arm to lower bump stop. Or to find the Z hieght of your blazer. Measure from the center of your lower arm bolt/pin to the ground (vehicle must be level). then measure from the bottom of the stearing knuckle to the ground. Subtract the two measurements, you want 4.9 inches(4" 7/8"). The higher you turn the torsion bar to raise your front end. the more problems you will have, especially rough riding.
P.S. You can do this adjustment without jacing up the Blazer. But if you have to tighten the adjustment screw, it can be tough. I suggest jacking up one side, Use a jack stand for safety! make an adjustment, then lowewr the vehicle. rock it back and forth to let the suspension settle and measure again. and repeat till all is well.
if its the old torsion bar suspension then lift vehicle and block it up the remove the end off the torsion bar and move it around a spline or two but you may just need new torsion bars as it is 19yrs old so its sell by date might have expired a slighty
When you change the two idler arms did you have the front end aligned? It could be possible that the alignment is off. If you are having to put alot of input to the steering wheel while driving that may give you the sway feeling you are describing. The torsion bars control front ride height and should be checked as part of the alignment. Hope this helps.
This vehicle should use torsion bars. if you look under the vehicle, you should see a rod going from the front(rear of the control arm) going to a frame just under the seating area. If so, there is also an adjustment which would bring the front end back up to a suitable ride height! Let me know if you need anything else.
Did you put the adjuster back at where they were before you disassembled it? Are you sure it wasn't on the bumper stops to begin with ? Does it look like the ride height is lower than it was ? If everything is together the way it should be and you have the adjusters at there max adjustment then your torsion bars are probably shot.
The torsion bar itself does not have to be indexed,it can be installed in any way,but the end that contains the adjuster has to be positioned in the correct way to attain full adjustment,and correct ride height.The best way to do this is to look and study carefully before removal,so that everything is reinstalled as it was.If that wasn't done in the beginning before removal,it's still ok as the torsion bars can be removed and replaced,trial and error style,until it's right.The thing that changes where the ride height is,is WHERE the adjuster end is,when the torsion bar is fitted to it.I have a 73 Plymouth with torsion bars,so i know what you are going through.Just position both adjuster ends about level when engaging the torsion bars into them.They should slip in relatively easy unless rusted up badly.It is ok to use some grease too,to allow easier install.Their is also a tool available that grasps the torsion bar to assist in removal or install.After install,make sure to replace the retainer clips back in to secure the bars.