Knock From Coilover

[B-Boi34]

Hi Guys

I purchased a set of BC racing BR SR coilovers last week from a member on this forum, they are 6 months old & supposedly have done less than a tank of petrol worth of driving.

I fitted them on Saturday & took it for a test drive to find a rather solid knock coming from the left rear, only when i went over a substantial bump at any speed, thinking maybe i have fitted them incorrectly I swapped the 2 rear coilovers around (left to right) & took it for another test run & now the knock is on the right rear so Its definitely the coilover thats stuffed

I checked the nut at the top & its tight, there is preload on the spring not sure how many millimetres but i can still turn the spring & no leaking issues. does anyone know what it could be? maybe the top mount? they are rubber not pillowball.

in advance

[Daleo]

Is the locking collar on the bottom fork mount done up tight?

If this is loose, you'll hear a knock.

[B-Boi34]

Not 100% sure what a locking collar is, is it the item the red arrows are pointing at in the attched picture?

[simpletool]

sheesh with that much threaded body you think they would spec a longer coil (10").

Yep, check the collars. Btw. Don't compress the rubber much at the top nut - you just do it up until just past touching (I also add some lock-tite, the type that doesn't fully cure).

[B-Boi34]

Ok so locking collar is tight, any other possibilities?

Edited September 1, 2011 by B-Boi34

[B-Boi34]

Just encase someone runs into the same issue, it was the actual shock that was faulty got a new shock knock is gone.