two clunking boxsters - Rennlist - Porsche Discussion Forums

Notices

two clunking boxsters

Old 12-12-2017, 12:48 PM
  #1  
dr914
User
Thread Starter
 
Join Date: Jun 2014
Posts: 479
Default two clunking boxsters





Funny, today one after the other two boxsters came into our shop, both both clunking in the rear! Typical control arm bushing problem. The noise is annoying as can be and makes the car seem like it is falling apart. Have to replace the complete arm, but what a difference it makes.

Last edited by dr914; 01-05-2019 at 02:28 PM. Reason: misspelling
dr914 is offline  
Old 12-12-2017, 02:53 PM
  #2  
Anker
User
 
Join Date: Nov 2016
Posts: 144
Default

Bought a Boxster S from our local indie. The car has a bad rattle from both sides in the rear, right one louder. He swore he couldn't find the source. I said it had to be the trailing arms, he was adamant it couldn't be them. I got a pair of used ones and replaced them. Rattle gone!
Anker is offline  
Old 12-13-2017, 11:49 AM
  #3  
Shawn Stanford
Addict
Rennlist Member
 
Shawn Stanford's Avatar
 
Join Date: Jun 2010
Location: The Poconos
Posts: 3,310
Default

You can't just replace the bushings?
Shawn Stanford is offline  
Old 12-13-2017, 12:17 PM
  #4  
Quadcammer
Super User
 
Join Date: Nov 2006
Location: Clifton, NJ
Posts: 12,542
Default

Originally Posted by Shawn Stanford View Post
You can't just replace the bushings?
nope, whole arm only, but a set can be had for under $200, so its not world ending.
Quadcammer is offline  
Old 12-13-2017, 10:11 PM
  #5  
Porschetech3
User
 
Porschetech3's Avatar
 
Join Date: Oct 2010
Location: Alabama USA
Posts: 804
Default

Originally Posted by Shawn Stanford View Post
You can't just replace the bushings?
I bought a pair of these for my 02 986s I am going to put on in the next few days. I like the idea of having the replaceable Heim joint on it and the adjust-ability. And they are less expensive than the OEM Porsche part and since I have a pair of 996s also that make a slight amount of noise, these could save a ton of $.

I like the replaceable Heim joint.
Porschetech3 is online now  
Old 12-14-2017, 11:16 AM
  #6  
Quadcammer
Super User
 
Join Date: Nov 2006
Location: Clifton, NJ
Posts: 12,542
Default

keep in mind they are also heavy as hell. I considered these but decided it wasn't worth it. Also, can you buy just the replacement parts? In my example, a set of megan racing arms had some kind of odd 11/16s thread in it that didn't match the usual rod ends.
Quadcammer is offline  
Old 12-16-2017, 03:22 PM
  #7  
sequel95
Addict
Rennlist Member
 
sequel95's Avatar
 
Join Date: Jun 2012
Location: Menomonee Falls, WI
Posts: 113
Default

PorscheTech: Where did you find those arms? Thanks!
sequel95 is offline  
Old 12-16-2017, 05:45 PM
  #8  
Porschetech3
User
 
Porschetech3's Avatar
 
Join Date: Oct 2010
Location: Alabama USA
Posts: 804
Default

Originally Posted by sequel95 View Post
PorscheTech: Where did you find those arms? Thanks!
They are in Addison Texas, here is their facebook page. Their products seem to be indicative of Asian manufacture, but of decent quality.The suspension control arm page seems to be down at this time, I have messaged them to see whats up with it. I am not affiliated with them in any way. You can inquire about the arms on Monday to see if they are still available.https://www.google.com/url?sa=t&rct=...HJLdxDM3VDZBQs
Porschetech3 is online now  
Old 12-16-2017, 06:17 PM
  #9  
Porschetech3
User
 
Porschetech3's Avatar
 
Join Date: Oct 2010
Location: Alabama USA
Posts: 804
Default

Originally Posted by Quadcammer View Post
keep in mind they are also heavy as hell. I considered these but decided it wasn't worth it. Also, can you buy just the replacement parts? In my example, a set of megan racing arms had some kind of odd 11/16s thread in it that didn't match the usual rod ends.
I agree they are heavier, but I don't intend to use any of my cars for competition so a little extra weight doesn't mean much to me. Back when I first learned of the ovaling cylinders and cracking heads nearly two decades ago, my first thought was if they had used about 10 more pounds of aluminum on the cylinders and head casting , they would have been bulletproof !!.But I do appreciate all the weight savings they have done in all the many other places.

I have messaged them about the replacement heim joints, and will let you know. I have not measured these yet to see if they are odd, or metric, but even if they are and not available , I don't think it will be much trouble to rethread it to a common 3/4 heim joint thread. I have built a few complete tube chasiss race cars and hand built complete suspensions for them, so this is not much of a step.
Porschetech3 is online now  
Old 12-19-2017, 10:29 AM
  #10  
Zky Captain
User
 
Join Date: Dec 2017
Posts: 5
Default

I have a2001 986 S. It sounds as if I have the same problem. Under acceleration, if I hit any bump in the road, it sounds as if the rear end of the car just got hit. A very loud clunk. Is this symptomatic of training arms? And is this a solo repair or are there other things I should consider replacing at the same time. Street use only.
Zky Captain is offline  
Old 12-19-2017, 10:54 AM
  #11  
Anker
User
 
Join Date: Nov 2016
Posts: 144
Default

The test whether its the trailing arms is as follows. Drive over the bump while under acceleration and braking. If the clunking goes away or is significantly reduced its the trailing arms. If its the same you have another problem.

The trailing arms are easy to replace with the right tools. Check the socket sizes you will need and get a high quality torque wrench, the right size box/open wrench to hold the other end of the nut/bolt and a good breaker bar. The bolt at the suspension end is under very high torque. You will need to put the rear of car on jack stands and remove the fender liners on both sides. There are DIY guides that you should read before doing it. I am very slow and it takes me about an hour per side to replace the trailing arms.

It will be a totally difference car after you have done the job.
Anker is offline  
Old 12-19-2017, 11:34 AM
  #12  
Zky Captain
User
 
Join Date: Dec 2017
Posts: 5
Default

Originally Posted by Anker View Post
The test whether its the trailing arms is as follows. Drive over the bump while under acceleration and braking. If the clunking goes away or is significantly reduced its the trailing arms. If its the same you have another problem.
The clunk is significantly harder under acceleration. I have not tried “braking” over the cracks in the road. I happen to have 2 virtually identical 2001 Boxster S’s. The other car is smooth and quiet.
Zky Captain is offline  
Old 12-19-2017, 01:47 PM
  #13  
dr914
User
Thread Starter
 
Join Date: Jun 2014
Posts: 479
Default

This is a typical problem with these cars when they clunk rattle in the rear when hitting bumps. Almost sounds like the top frame is rattling because sounds like it is coming from that area, which is right above the area where the arm rattles
dr914 is offline  
Old 12-19-2017, 02:12 PM
  #14  
Anker
User
 
Join Date: Nov 2016
Posts: 144
Default

Does the shifter move when you change throttle settings? Having it clunk louder when accelerating sounds like it could be the motor mount that's shot or possibly a transmission mount.
Anker is offline  
Old 12-19-2017, 03:20 PM
  #15  
dr914
User
Thread Starter
 
Join Date: Jun 2014
Posts: 479
Default

no that is probably the engine mount or tans mount
dr914 is offline  

Thread Tools
Search this Thread
Quick Reply: two clunking boxsters


Contact Us About Us Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: