10 replies to this topic

[TazN]

Hi guys, Took the rear undertray off last weekend to give everything a clean and inspect the suspension. Leaving for the national tomorrow so last night I stuck it back on. Now it was missing a single 10mm bolt before I took it off and was completely silent. I've now put it back on and have 3 10mm bolts left and only 2 holes for them. Neither of which are taking a bolt :/ I thoguht no problem it's on very tight so popped it back under the driveway cover and left it. Took it into work this morning, I say took it in. I got outside the village and as soon as I went past 30 I could hear (presuming the trays) rattling. Now I'm not talking a little vibration rattle but a full on metal slapping metal. Turned round and took it home and grabbed the daily so I could get into work. So when I go home tonight I'm going to have to tackle this again. Surely the few bolts I've not got back on wont make it that much tighter? I'll see if there's any play in it and nip them all up abit more. If that doesnt work I'm tempted to just remove them for the national and sort it out at a later date. Or am I being daft and missing something obvious? Just bout feed up off the vx atm, nothing seems to go right.

[techieboy]

Just bout feed up off the vx atm, nothing seems to go right.

I have days weeks months like that.

[JG]

I've rubber washered all the bolts and they are near silent now.

[JG]

Although at the moment i have no undertrays.... ...what time are we leaving tomorrow

[TazN]

I would use rubber washers but the sound isn't really where the bolts are rattling more where the whole undertray is vibrating. Honestly sounded loud enough that it would damage the clam...

[TazN]

Hi guys I'm sure most of you are getting ready for the national. I got home had some dinner and set back to work on the undertrays. I've tightened them all up so took it for a drive to see if this had cured it. It's made it better (noise kicks in around 45) but I think I've figured out where I've gone wrong, or at least where the noise is comming from. The middle tray goes from the front of the rear tray to the cross beam that you use the junction on for jacking. Now does the tray sit on top of this? Cause mine is sitting a few mm's over it but is underneath the beam. So when air goes under the car it's pushing the tray against this beam constantly. I've tried it with my hand and it makes exactly the same noise. I'll search through here for a pic of how the middle undertray is ment to fit but if someone could clear this up then it'd be muchly appreciated!

[Sticky]

The middle tray slots into the cross beam so there won't be an edge for the wind to rattle. You'll also find putting a strip of single sided adhesive foam on the leading edge of the under tray will make an even better fit when you slot it in to the cross beam.

[techieboy]

Yes, the leading edge slots in above that chassis beam.

[Sticky]

Yes, the leading edge slots in above that chassis beam.

You put it so much better than me Matt

[Ormes]

There should be a v shaped lip on the end of the tray, and that goes into a groove above the beam. EDIT (too late x 3 )

Edited by Ormes, 05 July 2012 - 07:17 PM.

[TazN]

Excellant! Thank you all for the lovely helpfull fast replies! Now back to work i guess