Knocking / Juddering when pulling away / hill starts

[Pelvis]

Hi all,
Clio sport 172 53'

Car has developed a knocking / juddering noise and feeling when pulling away at a slightly faster pace and if putting your foot down whilst driving.
Mechanic has looked at the car and all engine mounts seem solid and he can't see anything obvious.
Nothing seems to be loose or banging around (exhaust)

Just saw someone suggested replacing the "Dog Bone" on a different thread but not sure where that is located, anyone guide me to it as I can check to see in case he missed it.

Also does anyone have any suggestions what it could be ?
Thanks again for any help

 

[jamesycc]

Hi all,
Clio sport 172 53'

Car has developed a knocking / juddering noise and feeling when pulling away at a slightly faster pace and if putting your foot down whilst driving.
Mechanic has looked at the car and all engine mounts seem solid and he can't see anything obvious.
Nothing seems to be loose or banging around (exhaust)

Just saw someone suggested replacing the "Dog Bone" on a different thread but not sure where that is located, anyone guide me to it as I can check to see in case he missed it.

Also does anyone have any suggestions what it could be ?
Thanks again for any help

Dog bone is located under the car. It joins the lower part of the gearbox to front bulkhead. The bushes wear and allow too much movement at the bottom of the engine/transmission. The symptoms are usually a knocking or clunk on pull away. Its the exhaust manifold hitting the bulkhead as the bottom of the engine moves too much. I polybushed mine with some powerflex purple bushes, £50 ish and it went straight away. Was an easy job and it makes the gear change a little sharper.

 

[bashracing]

Does the gearstick move excessively under throttle on/off, this shows engine/gearbox mount issues
I would have a guess at clutch friction plate or flywheel issue though

 

[Pelvis]

Don't think the gear stick moves much on or off throttle,
I'll will try and get a video of it as its most noticeable when pulling away a little bit faster or of at higher revs then pulling away it judders and knocks (sounds like the front is loose knocking noise but not a 'grinding' noise)

 

[imprezaworks]

There's a group buy on evol gearbox mounts if it's of interest. Improves over standard

 

[Pelvis]

Any of you guys local to bristol and could help have a look at the car ?

 

[jamesycc]

Any of you guys local to bristol and could help have a look at the car ?

I'm in Bristol. Where are you?

 

[Pelvis]

I'm in Bristol. Where are you?

Warmley area, will message you

 

[Pelvis]

The bush that connects to the dogleg to the straight adjuster is split and not great, can't get the bigger bolt off the dog leg so unsure but doesn't look amazing in there,

Also how do you tighten the adjuster up ?

 

[jamesycc]

If it's split then it's time to replace it. The adjuster is just a 2 spanner job. Can't remember the sizes. One each side, hold one turn the other.i

 

[Pelvis]

Ah ok, so when tightening it up how do I pull it forward closer to the front of the engine to stop the banging noise ?

Found this guide:

So I don't have to worry about doing anything to the black bar nearer the engine ?

 

[Pelvis]

Fitted new mounts for the Dog bone and under the battery mount but no improvement :/ anyone else have any ideas what this could be ?
Could it be deeper such as clutch or Gearbox ?

 

[bashracing]

I would have a guess at clutch friction plate or flywheel issue though

 

[Pelvis]

Is there any way to test this before opening it all up ?

 

[bashracing]

double post

 

[bashracing]

If all the mounts seem in good condition, the next step is strip down, the first job is to remove the driveshafts and check them for excessive wear, if they are ok it's box out and checking for hot spots on the flywheel face and clutch pressure plate and then warping or uneven wear to the clutch friction plate

 

[Pelvis]

Ok Thanks,
Well the mechanic said all the mounts were fine and replaced 2 that looked slightly worn,
The drive shaft has been replaced which has helped but not cured it, is there any special things to look out for when fitting the driveshafts ?

When he had the drive shaft out he looked at the shim and it was bolted in (which he found different ) and suggested it might be a different gearbox ? (might just be the Clio sport one)

 

[bashracing]

Not sure what you mean by shim, I can't think of any around the shaft assembly, if he means diff bolted in, then yes 03ish onwards had bolted diffs. If he means the near side inner boot then yes all mk2 sports use the boot bolted to the box style.
if the shafts are causing the issue your mechanic will be able to tell with them in his hand.

 

[Pelvis]

Had a different mechanic friend look over the car and he thinks it's the springs in the clutch are loose and on take up it rattles around,

Thanks all for the help, shame it wasn't a quick fix but atleast I have enough knowledge when selling to let others know whats going on with the car.