Suspension hardware questions

loc182

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#1
I am planning to swap out my original stock springs for the Eibach Pro Kit and I have some questions that I couldn't find good answers for in existing threads.
(Sorry for yet another suspension thread!)

Is there a good aftermarket replacement for the front spring isolator/insulator?​
Toyota 48157-14020 has been discontinued and I didn't see anything on Rock Auto.​
Is it recommended to cut the bump stops with these springs?​
There is not much material on the stock bump stops as it is, so it seems unwise.​
Is it recommended to replace the front shock mount uppers when changing springs?​
When I take the car in for an alignment post upgrade is there anything I should tell the shop, or will they know what to do?​
Thanks as always for the all the support!
 
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Piratetip

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#2
I also currently have Eibachs and replaced everything.
A good product for spring isolators I found:
Tein Seilencer
PN: TEISPR02-H2186
PN: TEISPR02-G1497

One is 60-90mm other is 90-130mm.

Get 3x sets of the 90-130mm and one set of 60-90mm.
I placed the isolators at the base of the spring where it contacts the perch. Also placed an isolators between the coils where it transitions between linear and progressive spring rates.
So 2x isolators per spring.

A good place to pick them up for is rallysport direct, good prices.

KYB SB101 works good for new bumpstops for both front and rear.
I cut off about 1/2" to 1" off the bump stop to account for the lowering.

Check the condition of the top mounts. You might be able to reuse them.

Photo when I did mine.
 
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loc182

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#3
Thanks for the tip Piratetip! Your picture made me realize I had the front and rear mounts confused when I was looking at parts. Do you happen to have a pic of your front shocks too?

I really like the look of the isolators you recommended, I have placed my order!
 
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loc182

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#5
So you used one set of the TEISPR02-G149 replace the front spring isolator/insulator then?

I remember that mine definitely looked like the old one in this image so that is why I was worried when I couldn't find new ones.
 
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Piratetip

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#6
Oh the top perch rubber, I have newer mounts so didn't need to replace it.
The isolators I listed were just for the bottom spring perch and between the coils. 8x in total.

I don't know a source ATM to get a new rubber isolator for the top mounts.
I will check though.

That PN in the image is discontinued, so would need to find another suitable one.
 

Piratetip

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#8
Yep, ask.
I am also curious the source for an aftermarket part.
 

Piratetip

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#9
If you search Moog coil spring insulator, they make a ton of different styles for different vehicles.
The trouble is they don't list dimensions...
Would be pretty easy to match up a similar one if they did.
You have to know if a 1990 Volvo or whatever had the same size as the Supra by chance or really good memory.

Maybe someone has a friend at an auto parts store that would let them rummage around through boxes to find a suitable size.

I always wish auto parts makers would actually list dimensions for parts in a catalog for stuff like this.

The other option is to move to a style made by prothane or energy suspension.
Usually going to be harder urethane, but at least they list dimensions.
 

loc182

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#10
Thanks for all the great tips. I was looking on the Energy Suspension site wondering if anything might work.

Sadly YotaMD didn't know of any part numbers, so the hunt will continue!

I took some measurements today and it looks like I need something in this size:
inner Diameter: 3 in
Outer Diameter of lip: 3 1/2 in
Outer Diameter of part: 5 1/4 in
Pad Thickness: 3/8 in
Lip Height: 1/2 in
Total Height: 7/8 in

The heights are estimates from measuring a mount and using Photoshop to calculate the thickness and lip height. If anyone has more accurate data that would be wonderful. (Edit: Updated inner diameter to 3 inches.)

While my data may not be perfect, it looks like Energy Suspension 9.6107 will fit the bill. Ordered a set, fingers crossed!
 
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Piratetip

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#11
It's probably going to be close enough.
You will see when you try!
 

loc182

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#12
So the aforementioned 9.6107 was a bit larger than the center of the mount, but this is similar to how the OEM part appears to be based on the images at YotaMD. The inner lip was then ever so slightly too large for the spring, but I could force the spring into place with some pressure.

I am no expert here, but I felt like the quarter inch of play was a concern because the poly was so slippery. This led me to look for something a bit smaller and so I ordered the Energy Suspension 9.6104.

This part is closer in design to the OEM with only an inner lip, but it is a bit smaller. That said, it does stretch to fit on the mount and is just wide enough for the spring. See the images:

Isolator 002.jpg Isolator 001.jpg

Sorry it is hard to see, I wish I could have gotten the red model for clarity. I did use a bit of Photoshop to try and brighten things without blowing out colors.

While not pictured, the inner lip is about a half inch smaller than the inside of the spring.

In Summary:

9.6107
Pros: Holds spring in place on isolator, appears to be same thickness as OEM
Cons: Isolator can slip about 1/4 inch on the mount, inner lip is just a bit too big and requires force to seat spring

9.6104 (Pictured above)
Pros: Sits tight on mount, thickness appears just a bit more than OEM
Cons: Spring can slip about 1/2 inch on poly, poly must stretch a bit to sit flush with shock mount

What do you guys think? I can add pics of 9.6107 if you like.
 
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suprarx7nut

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#13
OK, I dug through some photos. Here's some clear pics of the isolator/insulator. Not sure if it helps or if it's just a tease since you can't buy them anymore, haha. In reality it's really just a low durometer disc of rubber/foam. My old OEM one was essentially completely compressed and worn through. I think either of your options would be fine as long as they keep the spring off the mount.

1565068740984.png

Here you can see the rear mounts with the built in insulator compared to the separate parts of the front mount and isolator.
1565068788263.png
1565068845472.png
 
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loc182

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#14
Haha, yeah, I have been looking at those pics a lot over the past couple of weeks. Save for the middle one, I think that is new and it is awesome to see the back of the real isolator!

This makes me think I should use the larger piece and just drill out small voids for the backs of the bolts to rest. This will make it so that it will stay in position.
 

loc182

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#15
I was gathering up my returns and discovered something interesting...

If I take both of the poly isolators I bought and put them together then the spring is held in place perfectly on the mount with no play. Here is an image:
Sandwich.jpg

I have not cut out voids for the mounting bolts on the lower isolator yet, so it is sitting a bit high in the picture.

Using both isolators appears to have two advantages:
  • The spring is held in place on the center of the shock mount
  • The spring is raised an additional 3/8 of an inch from the surface of the shock mount.

I like the second advantage because it almost completely cuts out the extra half inch of lowering that the front Eibach springs have. But I don't know if it is safe to have the spring sit higher like this?

Any feedback would be appreciated!
 

suprarx7nut

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#16
I don't like the idea of additional compliance in that spring interface - certainly not if it's enough to impact ride height. I think you want as little as possible without metal on metal contact.

I'd say chose one and go with it.
 

alcyon

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#17
Are those illuminas TEMS ? are those upper mounts from KYB ?

I also currently have Eibachs and replaced everything.
A good product for spring isolators I found:
Tein Seilencer
PN: TEISPR02-H2186
PN: TEISPR02-G1497

One is 60-90mm other is 90-130mm.

Get 3x sets of the 90-130mm and one set of 60-90mm.
I placed the isolators at the base of the spring where it contacts the perch. Also placed an isolators between the coils where it transitions between linear and progressive spring rates.
So 2x isolators per spring.

A good place to pick them up for is rallysport direct, good prices.

KYB SB101 works good for new bumpstops for both front and rear.
I cut off about 1/2" to 1" off the bump stop to account for the lowering.

Check the condition of the top mounts. You might be able to reuse them.

Photo when I did mine.
 
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Supramikect

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#20
I used MasterPro FM1650 from O'Reillys on my 92. $6 for pair, Just slightly thinner at 1/2" then the one new OEM I had but diameter was perfect match and it had a raised lip to fit into top spring coil