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Discussion Starter · #1 ·
Ok got everything together for my suspension except these items and wanted some opinions.
I am putting sprints on the car and want to know.

1st question
Should I buy new spring isolators for rear or just remove them?

2nd question
Also does the front have Isolators? If so where do I get them and should they be replaced or removed?

3rd question
Front bump stops? Cut stock down or get aftermarket?
I do not wanna remove front fender molding so need to make sure tires do not hit.
If aftermarket bumps which ones? Flat or something?

Thanks in advance. Plan to order these last parts Tuesday
 

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1st question
Should I buy new spring isolators for rear or just remove them?
I would they are usually trashed from years of a abuse, I have seen the lowers removed, keep the uppers or you will get squeaks and noise. http://www.rmsautoparts.com/proddetail.php?prod=10247105
2nd question
Also does the front have Isolators? If so where do I get them and should they be replaced or removed?
Yes they are on the upper portion of the springs again they are usually pretty worn out, I would replace them. http://www.rmsautoparts.com/proddetail.php?prod=15737908

3rd question
Front bump stops? Cut stock down or get aftermarket?
I do not wanna remove front fender molding so need to make sure tires do not hit.
If aftermarket bumps which ones? Flat or something?

Thanks in advance. Plan to order these last parts Tuesday
Most go with the ZQ8 version in the front, I wouldn't cut down factory units or us flat ones, if getting new get the ZQ8's not sure on the current part number of these units either. Hope this helps. you will have to double check the part numbers of the isolators I posted above, the rears are the right number but not sure on the fronts. Here is the part number I have for the ZQ8's http://www.rmsautoparts.com/proddetail.php?prod=15956547, you shouldn't have a problem with the wheels hitting the fender trim, well depending on the wheels you are running, as this piece in the front is pretty much a cover, if the wheels hit it you are going to have bigger problems as you will be hitting the fender
 

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Discussion Starter · #3 ·

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Discussion Starter · #5 ·
Yeah got C3 fab extended lowers and solid uppers. Going do the entire rear suspension at 1 time.
So will that snub er work with the drop?
 

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Ya know...I was going to get the ZQ8s, but I was too eager to put the 2" drop springs on. I just trimmed down the stock bumpstops and I have never had any issues.

I'm also running stiffer bilstein sports though, that could have an impact.

Then again, I would probably just do whatever 94MI9C1 says...
 

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I think that you will be alright I jsut looked at the link that you posted and that is for the front bumpstops, I am assuming that you are talking about the offset snubber that some put in, The last imp that I worked on it had extended arms and lowered with Hotchkis springs and never had a problem, you could always install the stuff and in the rear and see wear the snubber sits in relation to the pinion, if it looks like you are going to it if you hit a bump then you should probably replace it with and offset unit.


I just looked over at Bob's site and it states that the snubber you show in the link will work, so I would go with that one if you have any concerns.
 

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subscribed. great info
 

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Discussion Starter · #10 ·
Awesome Info and help from everybody.
Gonna order the insulators and bumps Tuesday.
 

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1st question
Should I buy new spring isolators for rear or just remove them?
I would they are usually trashed from years of a abuse, I have seen the lowers removed, keep the uppers or you will get squeaks and noise. http://www.rmsautoparts.com/proddetail.php?prod=10247105

Insulator, rear spring (4 per car)
GM 88913143 ACD 45G18001 = Moog K6203
NOTE: listed as BUSHING in GM parts ID nomenclature
NOTE: replaces OE production PN 10247105


Another note, secure the isolator, specifically the front units to the coil with electrical tape to hold it in place when installing, you will thank me later :)
Mike, the new style (blue) uppers (linked in Fuzzcar's post) drop into the spring and stay in place without any tape.
 

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Front coil isolators

When I installed the hotchkis coils on my car I used their poly isolators. I would not recommed using a poly isolator because they squeak terribly, buy the oe replacement type mentioned.
 

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so i read all this and got confused along the way. could some one give me the rms (or whatever dealer) page for the items i actually need and how many of each?? like bump stops (rear, front, or both) and spring isolators or insulators, whatever? all i have int the garage so far is: Vogtland springs and KYB drop shocks (front & back) from the old GP last year.

2 of these?? ----> http://www.rmsautoparts.com/proddetail.php?prod=K6203-2
2 of these? -----> http://www.rmsautoparts.com/proddetail.php?prod=15956547
2 of these? -----> http://www.rmsautoparts.com/proddetail.php?prod=15737908

IS THAT RIGHT???????????????
 

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so i read all this and got confused along the way. could some one give me the rms (or whatever dealer) page for the items i actually need and how many of each?? like bump stops (rear, front, or both) and spring isolators or insulators, whatever? all i have int the garage so far is: Vogtland springs and KYB drop shocks (front & back) from the old GP last year.

2 of these?? ----> http://www.rmsautoparts.com/proddetail.php?prod=K6203-2
2 of these? -----> http://www.rmsautoparts.com/proddetail.php?prod=15956547
2 of these? -----> http://www.rmsautoparts.com/proddetail.php?prod=15737908

IS THAT RIGHT???????????????
I think the first link is the rears, and to do top and bottom of both sides is 4 total. These are cheaper than the ones originally posted by mike
 

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So Im about to springs and shocks and want to make sure i replace these if need be. I need 4 for the rear and 2 for the front? Is this right?

88913143 - Rear insulator (qty 4)
15956547 - zq8 bump stop (qty 2)
15737908 - Front Insulator (blue, silverado, qty 2)

oh and p.s i'm going with belltech 2" lowering springs and belltech nitro drop shocks.
 

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Yes you need 4 for the rear of the car and you need 2 for the front of the car. On the front of the car you only use one on the top of each spring (Drive,Passenger). On the rear of the car you use 2 one on the top and on the bottom of each spring.
 
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