Reoccurring knocking noise

Post by **danmetallic** » 01 Sep 2014, 16:25

So I have this knocking noise. We had it about a year ago and it would come and go. Then it went for a good 10 months.

Now it's back. From the back left I think. In time with speed and only under power (nothing when coasting).

Took her out today and had the noise for 30mins then suddenly disappeared.

Could this be tappets (although would they cause constant knocking while engine running?)? Rear cv? Or maybe driveshaft, although no loss of power.

Off to Isle of Wight Thursday so just want to settle my mind.

Here's a vid of the knocking.

Thanks in advance.

https://vimeo.com/104938697

https://vimeo.com/104939593

Post by **ninja.turtle007** » 01 Sep 2014, 16:49

Have you checked the drive shaft hasn't come loose?

Post by **Oldiebut goodie** » 01 Sep 2014, 17:11

CV bolts is the usual culprit especially the outer ones.

Post by **kevtherev** » 01 Sep 2014, 18:24

WHS ^^^

Post by **lefty67** » 01 Sep 2014, 19:48

whs^^^^^
recently had exactly the same problem, but replaced inner and outer cv joints just so I knew that it was another job done, now cured.

Post by **chriscburgess** » 01 Sep 2014, 19:48

I had something similar for months. Only under power and on right hand bends.

Tried everything - even put padding around all cables etc because I thought they may be knocking against chassis.

Eventually, found that one of the 4 bolts on the gearbox mount towards the front of the van was missing. Replaced it and hey presto no more knocking.

Post by **scottbott** » 01 Sep 2014, 20:53

that is good to know,something to remember about

Post by **danmetallic** » 02 Sep 2014, 08:46

Thanks for all the suggestions. Soooo, I had the back wheels up this morning and turning them we're getting a pretty ugly noise from the gearbox

I think I might need to get it rebuilt by Aidan.

Has anyone else had this noise before? Would you risk driving it?

https://vimeo.com/104997576

Post by **Epiphone** » 02 Sep 2014, 09:35

here was some diagnostics I did when I had some knocking

https://vimeo.com/channels/264094

turned out it was a drive shaft failure simply

Post by **danmetallic** » 02 Sep 2014, 10:19

Epiphone wrote:here was some diagnostics I did when I had some knocking

https://vimeo.com/channels/264094

turned out it was a drive shaft failure simply

Thanks for this. Did you see my new video above from this morning?

Post by **Epiphone** » 02 Sep 2014, 10:51

your's sounds alot more broken, so I wouldnt drive it, if you dont have too

I didnt change the drive shaft myself, but I believe it is very easy

u need one of the gearboxers to comment

Post by **danmetallic** » 02 Sep 2014, 13:49

Well! I'm not sure if I should admit my idiocy. Gearbox noise in the above video is because we had in her partly in gear (I'm ashamed). And I've just got under the van and one of the cv bolts is loose (could be turned with my fingers). So that explains everything.

Post by **ajsimmo** » 05 Sep 2014, 06:56

Thanks for the update, and well done for fessing up. So many wouldn't have bothered or had the humility to admit a moment of slight numptiness that affects us all from time to time! Glad you found it - easily sorted too. Have a great, and knockless, trip!

Post by **danmetallic** » 10 Sep 2014, 09:11

ajsimmo wrote:Thanks for the update, and well done for fessing up. So many wouldn't have bothered or had the humility to admit a moment of slight numptiness that affects us all from time to time! Glad you found it - easily sorted too. Have a great, and knockless, trip!

Ta very much!

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