E9 Front Spring Rubber Question

John Kampschror

John Kampschror

Member
Site Donor
Messages
17
Reaction score
2
Location
Falls Church VA 22044
Hi Guys and thanks in advance for your expert advice. I have elected to change the stance of my recently purchased 1974 3.0cs. Good thing because as I removed the front struts, I noticed that the top spring rubbers were missing. Hmm. Here is my situation and question: I installed new lowering springs from Jaymic to see how they were going to fit as I wait for top spring rubbers to arrive. I noticed that the new springs are considerably shorter than stock and are free to spin around even with the strut mount bolted on tight. I am afraid that a stock thickness upper spring rubber isn't going to add enough to the equation to keep the spring from moving freely when the car is unloaded. I'm inclined to buy the 10MM spring rubbers from Wollothesch. Link here: https://www.wallothnesch.com/en/vorderachse/bmw-2-5-cs-3-0-csl-e9/katalogbild-31-06.html:
I do not know if these extra thick pads belong on the upper or lower side of the front spring. So, do the thicker spring rubbers on the front struts belong on the top or bottom of the spring?
 
This has happened to my M6 after I swapped out for " short red" BMW springs and my E9 with lowering springs and Bilstein HD's. I did not even need a spring compressor to put them back together. Once the car is put down and bearing weight, it should be fine. I always worried about a huge bump and the body raising so high and then coming down and slamming the spring top. It has never happened. Just make sure, since the spring will be separated from the pad till weight bearing, that you align the pad so the spring comes to sit in the right place and does not pinch the pad.
 
Thanks Bob. That is my exact situation. Good advice about making sure everything is lined up before setting the car on the ground. I'm leaving the stock springs on the rear and am still considering the 10mm pad though. Peace of mind...
Just wish I knew if they are upper or lower!
 
This was discussed in a thread a while back; some people who have tracked their cars are comfortable with the thought that the springs may turn with no weight on them. I do not like that configuration, but I don't track my e9- so if there is a way to keep the spring from turning when unloaded I would favor that. As a side note, the CN springs have very little tension on them when "unweighted" but enough to stop the spring from spinning.
 
I had the same problem with a set of lowering springs from Jaymic.
I don't like the idea of always having to check that they seat properly after everytime the car has been lifted, and I don't think it's very safe either.
I mean, it's bad enough if you ever were in a situation that you went airbourne with your car, but if it happened you'd want the springs in the right position.
On top of that, springs like these won't pass the yearly inspection over here, so I sent them back to Jaymic and went with H&R -40mm BMW e12 springs instead.
 
Had a similar issue with the Jaymic front springs, I have Bilstein sports which are shorter than the HD's, so the spring was slightly under tension, but the stance was no lower than with standard Spring. Rear springs were 6cm's lower than existing off the car and gave a good stance when fitted. Removed fronts and have cut 1 loop off the standard Spring to see how it sits. Gransin what's the distance between the wheel centre and the arch with the H&R -40 e12 springs?
 
E9madada said:
Gransin what's the distance between the wheel centre and the arch with the H&R -40 e12 springs?
Click to expand...

I don't remember, and at the moment the coupe is up on the lift for a 5 speed swap. I can measure it in a couple of weeks and post it here.
 
You must log in or register to reply here.
Back
Top