Yes it should be a adjustable front end torsion setup.I know my 87 is and the 86 should be no different.Get up under the vehicle and it should have two long rods going to the left and right side with bolts going up towards the chassis to adjust.I suggest buying a haynes or chiltons manual it does have a good explanation on how to do this.I did adjust mine due to a 15rim years ago with a 4 inch lift.You do have to jack up the truck front wheels off the ground both sides to do this.It is really easy to do.
You need to crank them up.
The torsion bars are adjustable.
Instead of using coil springs on the front suspension torsion bars are used from the lower control arms to the frame ( my 1995 Ford Explorer 4x4 has torsion bars , my dads 73 Dodge Coronet had torsion bars ) If you look at a lower front suspension that has torsion bars you will see the torsion bars going from the lower control arms rearward
On the rear of the bars, there is a bolt on each side coming down through the cross member. Tightening these two bolts will lift the front end.
When you crank on the torsion bars you are changing their spring tension.
Good info about raising front end by adjusting torsion bars.www.duramaxforum.com/forum/04-5-05-lly-performance-parts-discussion/4491-torsion-bar-adjustment.html
The 1st generation Nissan Pathfinder, 1987 - 1995 had a torsion bar suspension on the front end of the vehicle. There is a driver's side and passenger's side torsion bar and they are not interchangeable. 1996 - 2009 models do not use a torsion bar.
Yes you can Adjust the torsion bar to raise it. I did this on my 1 ton Chevy to raise the front end. I had an alignment right after and it has worked great ever since.
Take the truck to your local Chevy dealer and have them adjust the torsion bars to lift the front and then do a realignment. About 100 bucks. New torsion bar keys are not needed.
jack up front end, drop both bolts out of the torsion keys, knock both bars out then put new keys in
Um........no, no you can.
from your overflow valve