I'm planning the front suspension rebuild on my 70 GS since the steering was done a couple months ago, so I've pretty much everything I'll need on my shopping list but I'm not sure if I should replace my front coil springs (I feel like front suspension doesn't handle too well on road bumps even with new KYB shock absorbers), what could be a good symptom to know that is time to replace them? also I was checking on Rockauto and front coils are not available for 70 GS but are for 70 Chevelle (https://www.rockauto.com/en/catalog...454cid+v8,1495917,suspension,coil+spring,7512) are these the same for Buick? Also, does the 70 GS uses front coil insulators? I saw that there's one listed on Rockauto for front coils but I haven't see them on service manual
I though front and rear suspension needs insulation, so, what are these for? https://www.rockauto.com/en/moreinfo.php?pk=919897&cc=1379763&jsn=404 I though chevelle springs could be an easy to find replacement
Just because the coils fit a Chevelle, it doesn't necessarily mean they are correct for your Buick. Even AC cars got a different coil from non AC cars. No insulators on the front coils. Not convinced the coils are going to make it handle better. Shocks, sway bars and tires are more in play than coils
I've had good luck with the Moog #5398 Front Coil Springs. They are still available at multiple vendors i.e. Summit Racing, Amazon, RockAuto, .... etc. and they are about $75.00. I still have a pair that are like new and were in my '70 Skylark for about 100 miles before I installed Moroso Trick Springs to favor drag racing. Larry
I'm not looking for a "better handling" is just more like I have to pass speed or road bumps really slow or the front end is likely to hit the road and if I try to push each corner in the car by hand it feels too soft even with new shocks, but the car isn't inclined to one side or things like that so that's why I'm not sure if my springs are good or bad, what is a good method to check these? All shocks are new KYB Gas-a-just, sway bar links are new, tires are new too, I'm only going to replace all bushings and ball joints, steering is all new too And about the coils from chevelle, what is the difference in these? this is the first time I spend time with a car with coil springs, I was a mopar guys and most of those cars have torsion bars in front so, what is the difference? maybe ride height or is more like a comfort thing? I though basically all GM A-Body coil will be right on any GM A-Body car no matter if Chevy, Buick, Pontiac etc
Do you think that Chevy, Pontiac, Olds and Pontiac engines for a given year A body weigh the same? Do you think that a GS 350 engine and GS 455 engines for a given year weigh the same?
well thats another story I know Buick 455 is one of the lightest big blocks of its era and according to that my GS maybe should use softer front springs, is my logic right or I'm lost?
From what I see, you think it bounces too much? If that is the case, it is shocks. If those KYB's are adjustable, crank them down a turn or two. You could try a higher rate spring but I think it would make for a harsher ride. What tires do you have? Wide, skinny, tall short? What about wheels, stock, 17", 20" or 22"? Tire pressure. Everything needs to be tuned for the best possible experience.
^^This I got insulators for the front shipped with my Eaton springs. After a LOT of modification, adjustment, clocking, and frustration, I took them out. And all was good!
