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  #1  
Old 03-10-2015, 10:49 AM
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W116 brake lines rubbing

I noticed a rubbing sound when I was making a tight turn yesterday. Do the brake lines rub on anybody elses' car? I dont think they ever should. I'm afraid they could snag and get bent roughly or wear down over time. Not sure how old they are. Ive seen much worse. No heavy cracking or anything yet. I know these lines go from the inside but there's no bulging or any apparent issues with them.
I've replaced both front calipers and the lines went back just as they were when I started. I had to adjust them at the top to take the tension out of them after getting the hoses on the calipers. I hate that part. I hate the mess and dealing with these lines. If I have to reposition them some different way then I'll just order new lines.
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Old 03-10-2015, 10:52 AM
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Picture above is with the wheel cranked all the way and you can see the line pressed against the sidewall of the tire in the background.

I hate how this site wont let me attach more than one pic from my iphone and it wont accept half the photos I take unless I edit them in photoshop and resize them first. I dont exactly have photoshop on my phone.

Here's another pic with the wheel straight ahead. Sorry its blurry. The site only lets me upload the blurry photos from my phone.
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Last edited by rob300SD; 03-10-2015 at 11:11 AM.
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Old 03-10-2015, 11:06 AM
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Ok here is a better photo after editing it on my mac. Please excuse all that white stuff. That's salt.
You can see where the line rubbed on the tire and you can also see where the tire rubs on the lower arm. Is it supposed to go that far? This car does turn a pretty tight turn, I can do a Uturn on a street without going over the curb. Not bad for the size of the car.
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Old 03-10-2015, 11:09 AM
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It kinda looks like if I rotated the line at the top 90 degrees counter clockwise it would then curve away from the tire and maybe not interfere. *sigh* I hate my life.
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Old 03-11-2015, 10:05 AM
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I don't see where the tire is rubbing on the steering knuckle, but if it is, it's probably an indicator that the upper control arm pivot bushings are shot, giving you a negative camber angle.

Unless you have some wacky tire size on there (does not look like). What size tires are on the car?
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Old 03-12-2015, 01:51 PM
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Quote:
Originally Posted by rob300SD View Post
It kinda looks like if I rotated the line at the top 90 degrees counter clockwise it would then curve away from the tire and maybe not interfere. *sigh* I hate my life.
rob300SD,

I agree, the brake line should be rotated so it curves away from the tire.

It's a good practice to replace the flexible brake lines, for piece of mind, on any newly acquired vehicle if you don't know when they were replaced the last time.

My 300SD had complete brake service done by the prior owner shortly before I bought it.

Attached is a photo of the routing of the brake line on my front driver's side tire (215/70 R 14). Sorry it's a little dim - the cellphone flash is not very bright and I didn't have a work light with me.
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W116 brake lines rubbing-ds-front-flexible-brake-hose-routing.jpg  
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Old 03-11-2015, 05:45 PM
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It's not rubbing on the knuckle. It's rubbing on the lower control arm, there's a shiny spot on it. Just 205/70/14
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Old 03-11-2015, 05:47 PM
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The suspension is in super good shape. Ball joints and steering all tight as new.
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  #9  
Old 03-12-2015, 01:58 PM
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Thanks for the photo, yeah I guess I should order new lines and route them better.
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