 Rear suspension, What’s this. |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| pek771 |
 Jan 23 2024, 07:59 AM
Post
#1
|
|
Member  Group: Members Posts: 273 Joined: 23-November 05 From: Conover, NC Member No.: 5,175 Region Association: None 
 |
Hi all,
This is not what I was expecting when I took the rear suspension out to inspect. Are these some sort of plastic bushings? TIA Pat  |
   |
 
|
  |
Replies(1 - 15)
| mepstein |
Jan 23 2024, 08:06 AM
Post
#2
|
|
914-6 GT in waiting Group: Members Posts: 19,312 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
|
Yea. Lots of different aftermarket bushings (and homage ones in a lathe) were made over the years.
|
|
|
|
| pek771 |
Jan 23 2024, 08:32 AM
Post
#3
|
|
Member Group: Members Posts: 273 Joined: 23-November 05 From: Conover, NC Member No.: 5,175 Region Association: None
|
@mepstein , Thanks!
It swings very freely. and it has no play in it. I ordered some new rubber bushings prior to this, but I really don't know if I want to change them. Pat edit:that was the right side. The left side has a wallowed out hole in the suspension console. I have to ponder this. |
|
|
|
| mepstein |
Jan 23 2024, 09:24 AM
Post
#4
|
|
914-6 GT in waiting Group: Members Posts: 19,312 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
|
QUOTE(pek771 @ Jan 23 2024, 09:32 AM)  @mepstein , Thanks! It swings very freely. and it has no play in it. I ordered some new rubber bushings prior to this, but I really don't know if I want to change them. Pat edit:that was the right side. The left side has a wallowed out hole in the suspension console. I have to ponder this. That’s a common issue and the repair has been detailed on this site. (IMG:style_emoticons/default/beerchug.gif) |
|
|
|
| pek771 |
Jan 23 2024, 09:40 AM
Post
#5
|
|
Member Group: Members Posts: 273 Joined: 23-November 05 From: Conover, NC Member No.: 5,175 Region Association: None
|
thanks again!
|
|
|
|
| pek771 |
Jan 23 2024, 10:09 AM
Post
#6
|
|
Member Group: Members Posts: 273 Joined: 23-November 05 From: Conover, NC Member No.: 5,175 Region Association: None
|
After pondering the suspension console holes and their elongation, I seem to have a few options:
1 ignore it 2 find or build a jig and make new bushings in my lathe 3 put in new suspension consoles |
|
|
|
| 914werke |
Jan 23 2024, 10:33 AM
Post
#7
|
|
"I got blisters on me fingers" Group: Members Posts: 10,124 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest
|
QUOTE(pek771 @ Jan 23 2024, 06:32 AM) edit:that was the right side. The left side has a wallowed out hole in the suspension console. (IMG:style_emoticons/default/thisthreadisworthlesswithoutpics.gif) |
|
|
|
| Superhawk996 |
Jan 23 2024, 10:34 AM
Post
#8
|
|
914 Guru Group: Members Posts: 5,891 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
|
FYI
Part of the reason your console holes are wallowed out is due to the Delrin bushings. Those bushings DRASTICALLY increase loads into the body vs rubber bushings. |
|
|
|
| 914werke |
Jan 23 2024, 10:38 AM
Post
#9
|
|
"I got blisters on me fingers" Group: Members Posts: 10,124 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest
|
You might be able to correct the ears by simply welding the holes?
|
|
|
|
| SirAndy |
Jan 23 2024, 10:54 AM
Post
#10
|
|
Resident German Group: Admin Posts: 41,675 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(pek771 @ Jan 23 2024, 08:09 AM) 3 put in new suspension consoles You don't need a new console, you can fix the oval holes fairly simply. (IMG:style_emoticons/default/popcorn[1].gif) |
|
|
|
| bkrantz |
Jan 23 2024, 08:33 PM
Post
#11
|
|
914 Guru Group: Members Posts: 7,801 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains
|
QUOTE(914werke @ Jan 23 2024, 09:38 AM) You might be able to correct the ears by simply welding the holes? I did this with my 914 race car. Of course the ovals might have happened after I filed the console holes to get more negative camber. Which might have been, um, not quite legally approved. Anyway, it is easy to weld the long side of the oval hole and drill/file to restore the round hole. |
|
|
|
| pek771 |
Jan 24 2024, 05:29 AM
Post
#12
|
|
Member Group: Members Posts: 273 Joined: 23-November 05 From: Conover, NC Member No.: 5,175 Region Association: None
|
I think I’ll make some hat bushings from some 3/4 steel tube, fix the out of round with a uni-bit, and weld in the hats. That should work.
 I would think about welding the holes up except my eyesight has gone bad in my old age and my welding is not as good as it used to be. Plus, it’s harder to drill when it’s been welded. |
|
|
|
| pek771 |
Jan 25 2024, 05:36 AM
Post
#13
|
|
Member Group: Members Posts: 273 Joined: 23-November 05 From: Conover, NC Member No.: 5,175 Region Association: None
|
So, I’m guessing that the rear suspension bushings are anchored to the trailing arm and not the shaft. I’m also guessing the only way to get the old bushings out is to press them out?
I managed to get one suspension console drilled to 3/4”. Now to weld in the little 3/4 washers I made.  |
|
|
|
| pek771 |
Jan 27 2024, 05:47 AM
Post
#14
|
|
Member Group: Members Posts: 273 Joined: 23-November 05 From: Conover, NC Member No.: 5,175 Region Association: None
|
I made some hat bushings for the drilled out holes, 3/4 od x 14 mm id. I made them out of 4130. Anyone know what alloy of steel the suspension consoles are? I am guessing some sort of low carbon steel. The thickness is like 5.5 mm where the carrier meets the consoles. Now, I need to weld them in.
 |
|
|
|
| pek771 |
Jan 31 2024, 07:00 AM
Post
#15
|
|
Member Group: Members Posts: 273 Joined: 23-November 05 From: Conover, NC Member No.: 5,175 Region Association: None
|
Left rear trailing arm was damaged once, but I think it is ok and will align just fine. Looks like the car was hit once: understeered into a wall, left front, and left rear followed. The damage was very slight. My guess is that reinforced trailing arms would compromise the suspension consoles if this happened again.
I ordered new pivots from 914rubber, which are some sort of stainless, and solid. I am hoping no galvanic corrosion occurs with the 4130 hat bushings I made. I am contemplating welding up the ends of the old pivots, and turning them back down to 14 mm in the lathe. le in the way. I’ve also put in new rubber bushings, and pressed out the Delrin bushings. There is very little information available for the rear suspension structures for a street car. Race cars are different, probably due to the high maintenance requirements for racing. My new 100 lb Weltmeister springs are 2.5” longer than my old springs, so I’m guessing where to put the bottom support ring on the shock. Anyone know the free length of a stock spring? Next is to do the front suspension before I put the gas tank battery back in. I can’t wait to see what that looks like.  Can’t get at the steering coupler with that modu. |
|
|
|
| pek771 |
Feb 1 2024, 09:55 AM
Post
#16
|
|
Member Group: Members Posts: 273 Joined: 23-November 05 From: Conover, NC Member No.: 5,175 Region Association: None
|
Trailing arms are back in…no more play! Rubber bushings and new 914rubber pivots. The front still has delrin in the arms. And they swivel freely.
 |
|
|
|
|
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 6th June 2024 - 05:41 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.