Hey guys, I posted last month about a noise i was hearing once in a while from the rear of my car. I ordered the 14mm bolts from MM to replace the wrong 12mm bolts that connect the Front lower irs mount to the rear subframe. I also did the low profile to rear bolts while i was in there. I figured this would be easy to do but couldnt find any pics of it. So below is the 101 version. This is fairly easy and took about an hour and a half to do both sides.
Jack the rear of the car up and place a jack stand under each side of the rear sub frame. Being sure to leave room to get to the Irs subframe bolts you are replacing. Of course place blocks in front of the front tires.
This is a picture of the low profile top irs bolt installed. Just remove the original and install the new one, i think i used a 3/16 hex socket, but its actually 8mm. If the Irs subframe sags and the bolt is hard to get out or in, jack the frame up to relieve some stress off the bolt.
Now on to the lower bolts. Here you can see the jackstand is under the subframe and out of the way. This worked fine but im sure there are different places to hold the car up, just dont use the irs to do it.
Place the jack under the irs frame to support it when you remove the 12mm bolt. And to help align the holes to install the 14mm bolt.
Here you can see the head of the 12mm bolt on the other side of the subframe. A 18mm socket and extension is what you need for this. And I used a 18mm box wrench for the nut side.
Once the nut is off you can use a punch or screw driver to tap the old bolt out.
Here you can see my old bolts were smaller than the new ones. This made me feel good because up untill now i wasnt even sure if i had the wrong bolts on my car. Now after everything i have read through, I think about 90 percent of them had the 12mm bolts.
Now with the hole empty you will see its probably not perfectly aligned, so i used a punch to line it back up and a I had a my helper adjust the jack.
This worked on the other side, but that wasnt the case on this side so i used a big flat head to pry the irs frame to the front of the car and the bolt slid through.
The new nut for the 14mm bolt is bigger, i used a 13/16
Here is everything in perspective, you can see the new 14mm bolt on the right side and where the jack was. Hope this will help. Jason
Jack the rear of the car up and place a jack stand under each side of the rear sub frame. Being sure to leave room to get to the Irs subframe bolts you are replacing. Of course place blocks in front of the front tires.
This is a picture of the low profile top irs bolt installed. Just remove the original and install the new one, i think i used a 3/16 hex socket, but its actually 8mm. If the Irs subframe sags and the bolt is hard to get out or in, jack the frame up to relieve some stress off the bolt.
Now on to the lower bolts. Here you can see the jackstand is under the subframe and out of the way. This worked fine but im sure there are different places to hold the car up, just dont use the irs to do it.
Place the jack under the irs frame to support it when you remove the 12mm bolt. And to help align the holes to install the 14mm bolt.
Here you can see the head of the 12mm bolt on the other side of the subframe. A 18mm socket and extension is what you need for this. And I used a 18mm box wrench for the nut side.
Once the nut is off you can use a punch or screw driver to tap the old bolt out.
Here you can see my old bolts were smaller than the new ones. This made me feel good because up untill now i wasnt even sure if i had the wrong bolts on my car. Now after everything i have read through, I think about 90 percent of them had the 12mm bolts.
Now with the hole empty you will see its probably not perfectly aligned, so i used a punch to line it back up and a I had a my helper adjust the jack.
This worked on the other side, but that wasnt the case on this side so i used a big flat head to pry the irs frame to the front of the car and the bolt slid through.
The new nut for the 14mm bolt is bigger, i used a 13/16
Here is everything in perspective, you can see the new 14mm bolt on the right side and where the jack was. Hope this will help. Jason
