Hi NAM,

My new to me 06 MCS with 56k miles is still making a front end clunk on speed bumps. I've replaced FCAB with offset poly, inner (PF camber) and outer ball joints, PF sway bar bushings, Bilstein B6 struts and Swift springs, IE fixed camber top mounts, both engine mounts with inserts and tranny PF insert. I've torqued and retorqued and revisited all bolts maybe 4 times now. The two things i haven't replaced are inner outer tie rods and swaybar end links. I've tested the car with the links removed and clunk remained. pushing the wheels at 9 and 3 do not show signs of tie rod wear. Before I order tie rods and end links, do you guys have any other ideas? I know end links can cause clunk. can worn tie rods clunk? can a car with 56k miles have worn tie rods? sucks to need to re align.

 

Have you torqued the strut top mount bolt. The main one. Also check you bearing hubs.

 

Hi, yes. I’ve retorqued the main strut nut as well as the three mount nuts. I feel the clunk coming from somewhere lower in the vehicle. Would worn hub bearings cause a single clunk on speed bumps? I don’t get any of the other symptoms such as growling in low speeds/turns.

 

Bump with additional info. I'm really hoping somebody can help.

Clunk is coming from the passenger side and feels/sounds like from the area around the bottom of the spring. Also, it does it occasionally as if it has something to do with the spring rotating or position. Any ideas? Thanks in advance. I'll redo the strut/spring to make sure, any tips and thing to look out for? i read someone say but can't find it, that springs can bind and may need lubricating?

 

Likely endlinks, since you said you hadn't replaced them yet.

Disconnect the endlinks, secure them, and go over the same bump to test.

 

I just redid lowering the subframe and retorqued everything once again including bumper bolts etc. I’ve done the test with passenger end link removed and it still clunked I’m gonna order new end links and then cross fingers. Thanks for the advise. Will update.

 

Was it the endlinks? Encountering a similar issue on my r56.

 

Check your bumpstops.