: Rear springs replacement



subzero32
05-03-13, 09:03 PM
How do you replace the rear springs on my 2004 SRX with MRC? I can not log into the service manual website for some reason. Thanks.

rdgfx3
05-03-13, 11:02 PM
It's a very straight forward job. The hardest part would be removing the upper mounts of the shock and that's just because you have to remove a couple of interior panels to get to the top of the shock. ( I hate removing interior panels without a guide) Otherwise it looks to be very simple.

I know I'm going to come across as one of those guys, but that being said, apart from interior panel removal, this job appears to be so easy, if you have to ask how to do it, maybe you shouldn't.

I had a link to an online service manual, but the link isn't working. It was an excellent resource for repair of the 1st gen SRX. I damn sure hope it comes back. I have a subscription to Alldatadiy.com, but it absolutely sucks.

What's it doing? Giving you a bad ride? Welcome to the world of the worn out MRC. I replaced all four of my MRC units at a cost of about $1800.00. I put them on myself to save on labor.

I was wrong about upper mounts. Here are the instructions. Sorry, no pics.


Coil Spring Replacement

Removal Procedure
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Remove the tire and wheel.
3. Disconnect the automatic level control sensor link from the upper control arm.

4. Disconnect the head lamp adjustment link from the upper control arm.
5. Support and raise the lower control arm using a suitable jack.
6. Remove the shock absorber lower mounting bolt.
7. Lower the lower control arm and remove the support.
8. Support the rear frame with a suitable jack.

9. Important: Remove the frame bolts from the side that the coil spring is being replaced on.
Remove the frame to body side mounting bolts and washers.

10. Important: Lower the frame far enough to remove the coil spring without going past the guide pins.
Lower the side of the frame.

11. Remove the coil spring from the vehicle.

Installation:

1.Install the coil spring to the vehicle

2. Raise the frame.

3. Install the frame to body mounting bolts and washers.
Tighten the front bolts to 265 Nm (195 ft. lbs.).
Tighten the rear bolts to 191 Nm (140 ft. lbs.).
4. Remove the jack from the vehicle.
5. Install a suitable jack under the lower control arm

6. Using the jack raise the lower control arm until the shock absorber aligns with the knuckle.
7. Install the shock absorber lower retaining bolt. Tighten the bolt to 150 Nm (111 ft. lbs.).
8. Remove the jack from the vehicle.
9. Connect the head lamp adjustment link to the upper control arm.
10. Connect the automatic level control sensor link to the upper control arm.
11. Install the tire and wheel.
12. Lower the vehicle.

glake89
05-04-13, 10:20 AM
Here you can get the service manual on CD for $35.

http://www.drcustomparts.com/RepairManual.htm

subzero32
05-04-13, 12:58 PM
Thanks for the info. I have done extensive suspension work in the past and can more than handle this. I just like to research before I start to make it go smoothly and know my torque specs when re assembling. I had previously read you have to drop the frame slightly, I thought of just taking apart the lower control arm to access the spring. Man I wish my SRX did not have the MRC, ohh well. How does yours ride now that you replaced the shocks, did you do the springs also? Thanks.

rdgfx3
05-06-13, 05:16 PM
I'm sure you can handle the job. I hope I didn't insult your intelligence:bang2:

It rides better than it did when the MBCs were blown, no more 'chassis crashing' on a rough road. but the suggestion of replacing the springs intriques me. I do believe it could ride better, though. I've never heard of springs actually needing replacement. I've replaced springs on my MR2s to lower the ride height and subsequently made the ride worse. of course.

What's your reasoning for replacing the springs?

subzero32
05-08-13, 07:28 AM
I always felt if I was replacing shocks I should do springs as well. A spring over time will loose its ability to absorb shock so I reason at 123,000 miles they have been stressed very much. I know the shock really takes the majority of absorption over bumps but so do the springs to a lesser degree.

glake89
05-08-13, 10:04 AM
Actually, it's the spring that absorbs and releases the majority of the energy. The shock tempers the jounce and rebound.

conedoctor
05-08-13, 12:43 PM
Actually, it's the spring that absorbs and releases the majority of the energy. The shock tempers the jounce and rebound.

I think that is oversimplified a touch too much, need to factor is how things are moving as well.

Springs can loose rate over time but shocks are more of the wear item, the spring limits travel the shock limits the speeds things move. Years back when I had my solo car prepped for stock class we could not change springs but shocks were free, my springs held up the car but not much else since the shocks were so stiff and on a cold morning it was worse.

Not sure I would do springs but if your in there and want to spend the money then rock on, you can also get the springs tested on a spring tester to see if they are still good.

subzero32
05-09-13, 07:29 PM
After some research I may just replace the front springs because they are cheap and I have to remove them anyway to replace the shock.