Slight clunk when pulling away.
Slight clunk when pulling away.
Author
Discussion

groucho

Original Poster:

12,134 posts

275 months

Friday 1st September 2006
quotequote all
I've not noticed this before but when I let the clutch out with not many revs, there's a quiet clunk towards the rear of the car. It feels as if it's coming from the end of the prop area. It doesn't do it if the revs are a little higher.

Like I said I've not noticed that before so something is on the change, I hope NOT!

old64er

1,388 posts

267 months

Friday 1st September 2006
quotequote all
diff mount bushes?

do you hear something similar when you put it in reverse and let the clutch out?

Pasco

6,652 posts

257 months

Friday 1st September 2006
quotequote all
I bet its the fuel tank !!

Open the fuel cap and if you hear a hiss then its not venting right.

Pasco

gooner

243 posts

276 months

Saturday 2nd September 2006
quotequote all
My fuel tank does that (the hissing) after a long run, when I fill up - what do you have to do to check the venting?

I thought I had major diff/suspension problems until I realised the clunking noise was the tank.

gooner

groucho

Original Poster:

12,134 posts

275 months

Saturday 2nd September 2006
quotequote all
gooner said:
My fuel tank does that (the hissing) after a long run, when I fill up - what do you have to do to check the venting?

I thought I had major diff/suspension problems until I realised the clunking noise was the tank.

gooner



Not sure if that applies. It was doing it form cold. Although the tank was very empty. I'll have a look at that nonetheless.

groucho

Original Poster:

12,134 posts

275 months

Saturday 2nd September 2006
quotequote all
old64er said:
diff mount bushes?

do you hear something similar when you put it in reverse and let the clutch out?



Wouldn't have that been picked up in the 12000 service that I had done 3 months ago?

Slacey

1,113 posts

243 months

Saturday 2nd September 2006
quotequote all
I had a similar issue and hoped it would be the diff bushes - it wasn't. The diff itself was the problem - it never whined but there was enough wear in the bearings to increase the backlash enough for the unit to clunk as it took up drive. It will probably run on and on like that before a total failure but I'm having Bernie rebuild a replacement next week hopefully.

seasider

12,728 posts

278 months

Saturday 2nd September 2006
quotequote all
groucho said:
old64er said:
diff mount bushes?

do you hear something similar when you put it in reverse and let the clutch out?



Wouldn't have that been picked up in the 12000 service that I had done 3 months ago?
You would hope so but .......................

groucho

Original Poster:

12,134 posts

275 months

Saturday 2nd September 2006
quotequote all
Slacey said:
I had a similar issue and hoped it would be the diff bushes - it wasn't. The diff itself was the problem - it never whined but there was enough wear in the bearings to increase the backlash enough for the unit to clunk as it took up drive. It will probably run on and on like that before a total failure but I'm having Bernie rebuild a replacement next week hopefully.


It'll only do it on minimal revs on take-off, like 1200, anything above there is no clunk. I can't say I've ever noticed it before.

Edited by groucho on Saturday 2nd September 09:51

barreti

6,689 posts

266 months

Saturday 2nd September 2006
quotequote all
This is a bit of a long shot but it could be the prop shaft UJ's.
They are easy enough to check and getting them greased up usually quietens them down again.
If it is them I don't think its a major worry because they usually get a lot noisier if they are on their way out.

Paul V

4,489 posts

306 months

Saturday 2nd September 2006
quotequote all
Could be you left a can of WD40 in the boot?

FlipFlopGriff

7,144 posts

276 months

Monday 4th September 2006
quotequote all
Brain shrinking?
FFG

groucho

Original Poster:

12,134 posts

275 months

Monday 4th September 2006
quotequote all
FlipFlopGriff said:
Brain shrinking?
FFG


Yep, that's still ongoing. hehe

2Munkys

1,228 posts

266 months

Tuesday 5th September 2006
quotequote all
I think you need to get underneath Steve and have a look at the drive line that is exposed. I've encountered something similar which turned out to be the rear propshaft UJ flange mounting bolts having worked loose. Just make sure all is tight where it should be and illiminate that which is accessible first.

groucho

Original Poster:

12,134 posts

275 months

Tuesday 5th September 2006
quotequote all
2Munkys said:
I think you need to get underneath Steve and have a look at the drive line that is exposed. I've encountered something similar which turned out to be the rear propshaft UJ flange mounting bolts having worked loose. Just make sure all is tight where it should be and illiminate that which is accessible first.


I'll shall have a look, Bruce, and hope it's nothing that's going to cost any dosh.

97octane

2,203 posts

252 months

Tuesday 5th September 2006
quotequote all
groucho said:
2Munkys said:
I think you need to get underneath Steve and have a look at the drive line that is exposed. I've encountered something similar which turned out to be the rear propshaft UJ flange mounting bolts having worked loose. Just make sure all is tight where it should be and illiminate that which is accessible first.


I'll shall have a look, Bruce, and hope it's nothing that's going to cost any dosh.


I had similar noises & slightly clunky gear changes, thought likewise UJ or something worn at the back. Took it to get looked at ..... "Ahem, we think it's your driving, Sir!" Nothing worn or broken, just that when I get out of my Eurobox estate car & into the Tiv, the weight of the controls/clutch etc takes a little getting used to.... "it's not your daily driver, is it, Sir?"
paperbag

groucho

Original Poster:

12,134 posts

275 months

Wednesday 6th September 2006
quotequote all
If that's true, I'll have to get myself fixed. It'll be cheaper. hehe

Gremlin500

30 posts

244 months

Friday 20th October 2006
quotequote all
Hmmmmm, Interested in this thread -my '94 500 Pre-serp is EXACTLY the same, but it had a new diff about 1,000 miles ago. Is yours similar age/milage? Only hear it pulling away gently, usually with some left lock on, but it's more noticeable after a long run, never happens when cold. Just had MOT, no excessive play in driveshafts either. Curious.

john57

1,869 posts

257 months

Friday 20th October 2006
quotequote all
I get clonks from the rear of mine every now and then .... and have done since I bought it. Nothing much but it's been checked and is fine + MOT'd and all ok. Is this another "they all do that sir?" Seems to have no effect on the car or handling - it goes very well

groucho

Original Poster:

12,134 posts

275 months

Friday 20th October 2006
quotequote all
Gremlin500 said:
Hmmmmm, Interested in this thread -my '94 500 Pre-serp is EXACTLY the same, but it had a new diff about 1,000 miles ago. Is yours similar age/milage? Only hear it pulling away gently, usually with some left lock on, but it's more noticeable after a long run, never happens when cold. Just had MOT, no excessive play in driveshafts either. Curious.


Mine is a 98 with 26,000 miles.




john57 said:
I get clonks from the rear of mine every now and then .... and have done since I bought it. Nothing much but it's been checked and is fine + MOT'd and all ok. Is this another "they all do that sir?" Seems to have no effect on the car or handling - it goes very well


I get it only at slow speeds, like on takeoff. It's not always been like it, it only started a few weeks ago. Doesn't seem to affect the car when cruising.