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Discussion summary
YOUR RESEARCHRear strut mount question
Leading reported evidence
Install h&r lowering springs
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Leading evidence: 'Install h&r lowering springs' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install h&r lowering springs' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
I think it is part 7 (washer) that is replaced with a thicker one.
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Performed · outcome unconfirmed
In my pic above, I used the spacers that came with the new shocks and kept the old.
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Suggestion
I think a washer/spacer on the bottom of the spring (that sits on the spring perch on the shock body) is your best bet - otherwise, you�ll run into problems with the rod reaching the top nut�
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I installed h&r lowering springs on my 02 C4S. The back seems a 1/2� to low. I didn�t realize it but it�s soft rubber in the areas not near the bolts. Looking at the mount, is there anyway for me to add a 1/2� to rise the car a bit that would be safe?
The washer would go on the strut and the mount would rest on the washer.
okay, I flipped over and can see how it works. How long should it take me to get one side out?
I think it is part 7 (washer) that is replaced with a thicker one. The washer goes down the shaft where it eventually rests where the shaft diameter gets larger. #3 the stop plate rests on this washer.
Anyone know the diameter of the hole in the washer and the washer? What should it be made of?
I think a washer/spacer on the bottom of the spring (that sits on the spring perch on the shock body) is your best bet - otherwise, you�ll run into problems with the rod reaching the top nut�
Are you saying a large washer that the springs rests on? Sandwiched between spring and strut? I would think the spring would not be supported by the carriage sides and it would slip. Excuse my ignorance. Been a while.
That other part mentioned that the top of the strut goes into, Not sure if I have a .4 or .5. If I am already at a .5, I�m out of luck and if not, the difference doesn�t seem like it would make up a 1/2� otherwise. Are my measurements off?
In my pic above, I used the spacers that came with the new shocks and kept the old. I did manage to find a local guy that had a pair and gave him $20 for 'em, just in case I wanted to go a bit higher. I'll see if I can dig them out.
When I bought my bilsteins, they came with these large washers that went down over the strut and sat on a lip. The spring just sat on that? Sounds like I just need to find more of those washers and put a couple on each side.
Thanks all for the help.
Your serious lack if understanding has me genuinely concerned for your ability you perform this mod. U make a washer from hdpe, cutting board material, and put it under the spring. It cant go anywhrre. The shock tube goes through the middle. Look at the pics.
Fear not, I have no intentions of installing it myself, I�m just trying to understanding how the washer doesn�t rub against the metal shock tube when in use. It just doesn�t look like the there�s anything keeping it in place. My local shops aren�t familiar with this and I want to make sure I�m giving them them right product to install. Thanks for your patience 🍻
One reason to cut them from hdpe. U could always tack weld them on the flang if u use metal.
when u put the spacer in, the spring with the weight of the car on the suspension it will not move.
honestly if the mechanic doesnt understand the basic construction of a strut and what u want to do without an explaination then go to the next mechanic. But hopefully now u r a little more informed.
That's the answer I was looking for; the weight of the car keeps it in place.
Yea there's definitely not an abundance of specialty mechanics in my area, they all say this is 'custom' work.
I appreciate the help.
My bad bud, I took the tires off the rear today and saw where the base of the spring hits, it�s more self explanatory than I thought. I saw a diagram on a different site where the spring sat where the damper rod enters, so it didn�t make sense to me. Here�s what mine looks like.
Before I started throwing extra washers on, I'd replace that upper spring insulator and see what happens. It looks like there's something funky going on with yours.
The part that comes in 4mm & 5mm is actually the white plastic piece at the very top. Porsche specifies one or the other depending on if you have Sport or regular springs. Since you have aftermarket springs (look like Eibach possibly?), I don't know what to suggest. The part that I thought looked dodgy is the foam looking thing right below it. It is part #997.333.504.00 and as far as I remember only comes in one thickness. I didn't go back through this whole thread to see if you mentioned your year and model so I can only say this applied to my '99 C2.
I used the term
foam looking thing
to try and clarify which part I was referring to in my pic. It's not foam
or
plastic, it's rubber.
Here's a pic of a T pin stuck in the 'hard plastic'.
The rear top spring seats on my car are the white ones�I assure you they�re not rubber� Apparently, there are at least two different materials used for these parts�
Part 3 is plastic, 4 is rubber.
4 is now updated with a 997 number and is off white, brown. The original was black.
99733350400
Part 3
99633351102
99633351103
This is the rubber part.
This is plastic, comes in .5 and 4mm heights
This gets more and more interesting From what I remember (it�s been a couple years now) I had neither the brown or black rubber part on mine. They are solid high density whitish plastic (not the interlocking cover piece shown). Clearly updated parts (mine is a �99).
