86camaro383

iTrader: (3)

Im going to be replaceing the coil springs soon in my Iroc, but want new isolaters. Noone seems to have em, any ideas?

formula_pilot

You can buy brand new factory spring isolators, both front and rear, from GM Parts Direct. Any GM dealer should also be able to get them for you. I bought all new isolators from GM. The new rears are overall an inch or so taller than the originals, but the "pocket" that the spring sits in is deeper, so you end up with the same ride height.

JamesC

iTrader: (5)

Spohn, a board sponsor, sells the fronts.

JamesC

Mikz86TA

iTrader: (4)

Used to have them in Jegs a time back. Try also Classic Industries

86camaro383

iTrader: (3)

thanks everyone for your replies. I got them from the Pontiac dealership, they should be here tomarrow, fronts and backs.

JamesC

iTrader: (5)

According to Ed Miller, local brake guru, the rears will make the rear sit up.

JamesC

formula_pilot

I have read that the new style isolators will make the car ride an inch higher, but my experience with p/n 10290379 rear isolator was different. I measured ride height before and after with a tape measure, and if there was any change in ride height, it was insignificant. I did find that if the springs were not seated properly in the isolators, and oriented on the axle properly, then the ride height will change. Perhaps people did not get the orientations correct and ended up with higher ride heights.

novatuc

I put the new factory (4th gen) rear isolaters in my car when I changed the springs (Moog). It does ride higer in the rear but it is not a bad look and will probably settle as the springs wear in. I had an 85 T/A with the WS6 blah blah blah and it was a great car but the 245's on 16 inch rims always looked small to me. I think it was the rear sagged a bit. I personally like the look of a tire filling up the wheel well. Currently I have 235/60 15's all around the car and I think I'm gonna go to 235/70 15's in the rear just to fill up the space. I know this has nothing to do with your original post, but it's raining and I'm bored so I thought I'd throw it out there.

JamesC

iTrader: (5)

Certainly the spring must be situated in the isolator properly; however, the rear springs require no special orientation that I'm aware of (my shop manual makes no mention of it).

JamesC

IROCU2

What springs did you go with on the front? Did you put both front and back springs in? If so how does the ride feel now? Thanks

JamesC

iTrader: (5)

IROC style Moog, fronts 5662 and rears 5665. Along with Koni Reds, the ride is first-rate. The rear sits a bit higher than I'd like, however. I replaced the OE insolator with radiator hose and brought it down some 1/2".

JamesC