Knocking, rear left only.

Random Caddy chat.
Not the place for sale or wanted topics.
John M
Twin Turbo poster
Posts: 368
Joined: Sun Apr 15, 2012 12:48 pm
Engine size/power: 1.6 CR TDI (102bhp)

Knocking, rear left only.

Post by John M » Sat Feb 15, 2020 7:09 am

64 plate 1.6 highline, standard suspension on 17 alloys all factory standard and ive developed a light knocking not at speed or under load just trundling along on not really bad roads either, ive done the ARB bushes and the connecting rods and the shocks seem ok tbf. any ideas anyone? its like theres a largfe bolt tapping on the chassis...

User avatar
Barbel330
Hyper Poster
Posts: 2049
Joined: Tue Dec 15, 2015 9:20 pm
Engine size/power: 1.6 CR TDI (102bhp)

Re: Knocking, rear left only.

Post by Barbel330 » Sat Feb 15, 2020 9:44 am

If you checked all the various bushes then my money would be on the shock. You could swap them side to side and see if the noise follows.
Instagram: @y_5cuf

John M
Twin Turbo poster
Posts: 368
Joined: Sun Apr 15, 2012 12:48 pm
Engine size/power: 1.6 CR TDI (102bhp)

Re: Knocking, rear left only.

Post by John M » Sat Feb 15, 2020 3:25 pm

I had the same knocking rattling on my last van and put new shocks on and it wasnt that, changed the pads thought it was that but it wasnt. could my ARB be worn out at 100,000 miles?

peely
Hyper Poster
Posts: 693
Joined: Fri Dec 22, 2017 5:02 am
Engine size/power: 1.6 CR TDI (102bhp)
Location: Tf4 3sh

Re: Knocking, rear left only.

Post by peely » Sat Feb 15, 2020 4:06 pm

I have a rattle too I’ve done arb links bushes , shocks , pads , I thought I’d sussed it yesterday I found that if I thumped the fuel tank I got a rattle that sounded just like it , if your lying under the back of the van looking up at the tank to your right side there is a brake pipe and sensor wire that disappears over the tank the brake pipe was sat on the tank , RESULT. No it’s still there 😡.
Golf mk6 seats,Touran rear seats,carpet,console,2017 caddy life mfsw,Audi s3air vents, passsat w8 interior light, golf mk6gttdi wheels,rear barn door spoiler , rns 510 head unit , revers camera,boarded and carpeted rear with led strip lights, mk4 rear lights .

User avatar
Giddy
Hyper Poster
Posts: 1094
Joined: Fri Aug 24, 2018 5:56 pm
Engine size/power: 1.4TSI
Location: Gloucestershire, UK

Re: Knocking, rear left only.

Post by Giddy » Sat Feb 15, 2020 6:38 pm

I had a minor annoying knocking, so asked my mate to drive a van while I sat in the back, trying to locate where the knocking coming from. And it turned out to be the bottom barn door catch. Adjusted it by 0.5mm and the knocking gone.
Instagram: @giddywagen
Caddy 4, Highline, 1.4 TSI, Build thread https://www.caddy2k.com/forum/viewtopic ... 13&t=37368

peely
Hyper Poster
Posts: 693
Joined: Fri Dec 22, 2017 5:02 am
Engine size/power: 1.6 CR TDI (102bhp)
Location: Tf4 3sh

Re: Knocking, rear left only.

Post by peely » Sat Feb 15, 2020 6:44 pm

Ohhh I’m on it , did it knock just rolling, I can just roll down my road which believe it or not has no potholes and it will knock, very slight but constant , I’m gonna check wheel bearings too I think , doing me head in 🤨
Golf mk6 seats,Touran rear seats,carpet,console,2017 caddy life mfsw,Audi s3air vents, passsat w8 interior light, golf mk6gttdi wheels,rear barn door spoiler , rns 510 head unit , revers camera,boarded and carpeted rear with led strip lights, mk4 rear lights .

John M
Twin Turbo poster
Posts: 368
Joined: Sun Apr 15, 2012 12:48 pm
Engine size/power: 1.6 CR TDI (102bhp)

Re: Knocking, rear left only.

Post by John M » Sun Feb 16, 2020 7:24 am

Peely we are both in the same boat, knocking wise, yours sounds the same as mine. It is doing my head in too.

peely
Hyper Poster
Posts: 693
Joined: Fri Dec 22, 2017 5:02 am
Engine size/power: 1.6 CR TDI (102bhp)
Location: Tf4 3sh

Re: Knocking, rear left only.

Post by peely » Sun Feb 16, 2020 1:32 pm

I’m gonna get my missed to drive it and I’m getting in the back , I’m 100% sure mine is not bump related
Golf mk6 seats,Touran rear seats,carpet,console,2017 caddy life mfsw,Audi s3air vents, passsat w8 interior light, golf mk6gttdi wheels,rear barn door spoiler , rns 510 head unit , revers camera,boarded and carpeted rear with led strip lights, mk4 rear lights .

John M
Twin Turbo poster
Posts: 368
Joined: Sun Apr 15, 2012 12:48 pm
Engine size/power: 1.6 CR TDI (102bhp)

Re: Knocking, rear left only.

Post by John M » Sun Feb 16, 2020 1:52 pm

i banged on the petrol tank and think i got the sound, anyone know what runs above the tank?

John M
Twin Turbo poster
Posts: 368
Joined: Sun Apr 15, 2012 12:48 pm
Engine size/power: 1.6 CR TDI (102bhp)

Re: Knocking, rear left only.

Post by John M » Sat Feb 29, 2020 7:32 am

Did anyone get to the bottom of this ? fitted standard height Bilsteins yesterday and its a bit more pronounced, old shocks were shagged,...is there a known sender unit problem ?

peely
Hyper Poster
Posts: 693
Joined: Fri Dec 22, 2017 5:02 am
Engine size/power: 1.6 CR TDI (102bhp)
Location: Tf4 3sh

Re: Knocking, rear left only.

Post by peely » Sat Feb 29, 2020 8:21 am

I’m actually thinking it is my shocks, when I fitted my gaz rears I noticed play in the bottom bush /sleeve, this was before tightening the nut , I’m thinking my bushing is wrong from new , gonna see if I can get some bushes/sleeves for them .
Golf mk6 seats,Touran rear seats,carpet,console,2017 caddy life mfsw,Audi s3air vents, passsat w8 interior light, golf mk6gttdi wheels,rear barn door spoiler , rns 510 head unit , revers camera,boarded and carpeted rear with led strip lights, mk4 rear lights .

peely
Hyper Poster
Posts: 693
Joined: Fri Dec 22, 2017 5:02 am
Engine size/power: 1.6 CR TDI (102bhp)
Location: Tf4 3sh

Re: Knocking, rear left only.

Post by peely » Wed Mar 04, 2020 2:25 pm

Well I think I may have found what I thought was a rattle, after having a full day replacing my struts top mounts I had another day phaffing with the back end tightening bolts replacing bolts and bushes to no avail I have gaz adjustable shocks on the back so there I am bouncing the back for about an hour and had a thought , loosen the adjustment right off , and hay presto noise goes , increased adjustment noise comes back so my noise is the piston action of the shocks, so why doesn’t everyone have this , is it the way my van is set , I’m in the 4th hole up from the road if you get my meaning, do you think I need to drop it some more. Can anyone shine some light on this , thanks , sorry I am axle flipped with shackles 👍
Golf mk6 seats,Touran rear seats,carpet,console,2017 caddy life mfsw,Audi s3air vents, passsat w8 interior light, golf mk6gttdi wheels,rear barn door spoiler , rns 510 head unit , revers camera,boarded and carpeted rear with led strip lights, mk4 rear lights .

Craig Cheatham
100BHP+
Posts: 172
Joined: Sat Jan 20, 2018 11:30 am
Engine size/power: 1.6 CR TDI (102bhp)
Location: Worcestershire

Re: Knocking, rear left only.

Post by Craig Cheatham » Wed Mar 04, 2020 5:48 pm

Hi Peely, just a thought, when you fitted the Gaz shocks did you tighten the bolts up with the full weight of the the van on the dampers or was it jacked up with the wheels off the ground?

peely
Hyper Poster
Posts: 693
Joined: Fri Dec 22, 2017 5:02 am
Engine size/power: 1.6 CR TDI (102bhp)
Location: Tf4 3sh

Re: Knocking, rear left only.

Post by peely » Wed Mar 04, 2020 6:30 pm

Hi mate yeh it was full weight, and it’s still knocking 🙈, it does it as soon as I roll , wheel bearings are good ,
Golf mk6 seats,Touran rear seats,carpet,console,2017 caddy life mfsw,Audi s3air vents, passsat w8 interior light, golf mk6gttdi wheels,rear barn door spoiler , rns 510 head unit , revers camera,boarded and carpeted rear with led strip lights, mk4 rear lights .

John M
Twin Turbo poster
Posts: 368
Joined: Sun Apr 15, 2012 12:48 pm
Engine size/power: 1.6 CR TDI (102bhp)

Re: Knocking, rear left only.

Post by John M » Fri Mar 06, 2020 4:04 pm

I still havent found out what the noise is, I take it you havent too peely?..going back on the lift tomorrow for the 10th time, remove the tank see whats around it.

Post Reply