Knocking sound after my lowering job

[henz79]

Hi mates,

Well i just finished lowering my EA with PEDDERS product and it looks so nice. But driving it theres a anoying knocking sound from the back. I double check itn and retighten the nuts and its still the same. Is this normal or not. Any ideas and thoughts will be appreciated. Thanks die hard EA fan
:SaiyanSmi

[klawsterfobik]

Could be the exhaust hitting on the Diff, or rear axle. Have you checked the clearance between the two?

Does it do it just when driving, or more so when you go over bumps etc?

[niko]

suspension works harder wen u lower.

[LUXO_8]

once the car settles you have to jack it up again and retighten all the shock bolts / nuts.
if you dont it will clunk like anything
chances are this is the problem

[INJECTED_250]

sounds like the shockers arnt tight.. cHeck the nuts inside the car

[Age182]

my car makes a knocking noise i just put mi exhaust system on and its that hitting the body but my exhaust rubbers wer cracked so i might replace dem first

When i lowered my car i heard a knocking sound and it was the tailshaft knocking on the body.

[EA_Bender]

when i got mine done it started knocking after driving a couple of k's, took it straight back and tightened them up, no more knocks

[Stevo]

It could be the bottom bolts on your shocks.. They dont tighten properly when you have the car jacked up.

What I did was jack the car up, sit the wheels on a brick (do this so you can get under it, and it keep the weight of the car on the shock bolts), then tighten up the bottom bolts for the shocks.

Steve

[henz79]

I Retighten all the bolts, that solve the other anoying sound. THEN i desided to bounce on the car at the rear and sound something is hitting the body or something. Jack the car up, there's a new rubbing marks on the end bolts or the stapiliser bar. But the shouldent be it , it maybe the tailpipe its a loud uncomfordable knock ...... Its really annnnoying...........

[fairmont1998]

Welcome to the world of lowered cars! I had to have my tailpipe modified when I lowered the Fairmont.

[LUXO_8]

yep, that one definatley sounds like exhaust..

[BoZZa17]

yeah i got a knocking sound after i lowered it

still there
but as the engine isnt working yet no point in fixing the knocking sound! lol

[hornet]

I'd say its either the exhaust on the diff or sway bar, or its your bottom bolts on the shocks.

I had this problem repeately, untill i learned that I had to tighten the bottom shock bolts with the car on the ground and not on the jack.

[sphell]

if it's the exhaust hitting the diff, get a big rubber exhaust mount (the round ones) and some metal cable ties and tie it to the axle where the exhaust hits. Presto, no more knocking sound.

[oneredED]

I had a knocking sound in mine when it was superlow at the rear. I found that when i replaced the shocks, the sound went away, and then came back once the new shocks became buggered again after about a month. Anyone got other suggestions other than exhaust? (I torqued mine up on the ground as said in the workshop manual)

[Stevo]

Jared, it probably dosnt help that your car is super super super super low ?
Checked that its not ur seat rubbing on the road ?

[TURBO_GHIA]

i had knocking sound when i lowered my old EB it was the bottom bolts on the rear shocks so try that

[-jjM-]

iv still got my knockin noise in the back, right hand, very sure its the shock, when chucked in the new springs, i chucked in new shocks for it too, noise is there, it makes noise whenn ever goin over bumps n potholes n other crap on the road, someone was tellin me grab the shaft of the shock wit sum multigrips and twist it around, nyone heard this before?

[Zedjay]

have you checked all the bushes????

[steven95falc]

Originally Posted by henz79

Hi mates,

Well i just finished lowering my EA with PEDDERS product and it looks so nice. But driving it theres a anoying knocking sound from the back. I double check itn and retighten the nuts and its still the same. Is this normal or not. Any ideas and thoughts will be appreciated. Thanks die hard EA fan
:SaiyanSmi

hey champ had similar problem check the shocks if they are the old ones they may be toping out or the bump stops around the shaft are stuffed either of the two or if there new shocks check they have the bump stops round the shocker shaft

[CruizinEB]

Probly the exhaust

[henz79]

THANKS everyone, I follow all your advises and it works. I didnt jack the car up i just stick my fat heat and long arms down there and retighten the back lower shockc bolts and it works. So my car is not that low.

THANKS HEAPS........................

[hornet]

Glad to see it worked. That noise drove me insane for months. After removing and reinstalling my shocks, it went away for a couple of days then came back. Once i learned about tightening them on the ground, problem solvered.

[Kenaz]

I never knew about this tightening the shocks on the grond business. Might have to give it a go and see if it fixes the knocking sound coming from mine.

[gozza]

i got s'low king springs all round with monroe gt's
no problems or knocking except for the front wheel guard which i pushed back into place

[toothless]

I know its a old thread but its the exhaust hitting the diff's control arms because i have this issue aswell and you just learn to live with it even though i have new exhaust mounts on