Hard knocking under acceleration

ash_89

Active Member
Mar 16, 2013
183
83
Bedfordshire
This morning i thought id see what my Leon was like accelerating off in 1st gear (stupid i know) i didn't shove it into 2nd i actually slowed right down as soon as it started knocking
i get a horrible wheel hop and a huge knocking noise that matched the wheel vibration as if it was struggling for traction it sounds like heavy metal on metal bars hitting together

i have also noticed i sometimes get a big clunk when slowing down for a roundabout

car is leon k1 stage 1
powerflex bottom insert
miltek catback exhaust
 

ZiggyEP3

Active Member
Jan 28, 2013
406
72
UK
May sound silly but check your wheel bolts are not loose. I had it happen to me and it found it was the near side front wheel bolts where loose.
 

saveoursouls

Active Member
Jul 4, 2018
415
234
36
Manchester
I get the clunk sound sometimes if I drop off the accelerator at the top of the revs, car lurches forward and causes something to shift which makes a clunk sound. I’m not sure what it is.
 

fozzybear

middle aged speed freak
Feb 4, 2006
317
19
halifax,west yorks
its the dogbone and lower engine mount.....check dogbone if ok ,lower gearbox mount{where front of dogbone goes}…plus you.ll always get the wheel hop,thats always on fast set off....to stop this fit powerflex lower g/box mount insert[fits in gaps on lower mount.] this stops movement in bush ,suggest to do both engine mounts to cut stress on these mounts....and you.ll have smooth set off...I,ve done this and is better all round easy to do ….check out fitting on youtube….
 
Progressive Parts, performance parts and tuning specialists