Irritating high-pitch noise

Noddyunplugged · Post by **Noddyunplugged** » Wed Oct 01, 2014 1:15 pm

High all, this is a quick question before I can actually get chance to have a look in to it at the weekend.....

I've got a '97 5th gen UK VTI. Just bought it last weekend. On the way home from picking it up it started making this terrible sound - anyone here know what a 'grass trumpet' is and the terrible, annoying noise it makes?! Very similar to that! Kind of like air rushing (squeezing/being sucked in) somewhere or kind of like a small fan with a squeeky, worn-out bearing. But because of just how it sounds and where it's coming from - I'm thinking it might be air-related.

Now it seems to be coming from an area of the dash/behind the dash, right in front of the driver, somewhere between the right hand side of the clock pod and the A-pillar...

Does anyone have any ideas what this might be? Car runs just fine, switching the air-con on/off, in fact just messing about without the interior heating system in anyway, even opening and closing the vents individually - makes no difference - tried everything. And it only happens at speeds of 50 to 70 mph too! it's at it's loudest at around 65 mph. Once you reach 70+_ it stops again.

It's driving me up the wall!!!

My thoughts:-
Tiny gap in windscreen seal at the bottom...?
Tin gap in engine intake pipework/resonator box in the front wing...?
Something caught in the air vent, outside of windscreen (only being effected once enough draft has been caught once I've reached speed...?

Dave

Post by **Merlin** » Wed Oct 01, 2014 1:25 pm

Welcome to LG!!

Would you be able to get a vid of the problem so we can hear it?

YouTube · Post by **Sailor** » Wed Oct 01, 2014 1:27 pm

My ATR had this. It was a small gap in the windscreen rubber at the top. TigerSeal!

Post by **Drax** » Wed Oct 01, 2014 1:42 pm

is it the wife?.....

Noddyunplugged · Post by **Noddyunplugged** » Wed Oct 01, 2014 1:49 pm

Thanks for the welcome lol. I'll do a propper 'hi' when I get around to it, so busy at the mo.

Haha - no wife on the scene so that rules that out - would have been an easy fix - duct tape or leave her at home!

Sailor - Ahh okie doke then, I'll check all around the windscreen seal first then as a priority. I've got some silicone sealant...

This sounds like it's coming from the bottom of the screen more than the top though. Was yours actually visible from the outside then?

Noddyunplugged · Post by **Noddyunplugged** » Thu Oct 02, 2014 10:16 am

Had a quick look around the windscreen seal last night (itigjt actually be coming from the top - I was thinking on the drive home last night that the way it was sounding it was hard to tell if it was top or bottom...
Anyway, there is a little gap along the top between the rubber seal and the glass - but it's very uniform all the way along the top. I'll still try and neatly run a bead of some sealer along that first though and see if that was it. At the mo I've got some clear silicon and some black drain adhesive gum type stuff. Or would the would the tiger stuff be better?

bb1boy · Post by **bb1boy** » Thu Oct 02, 2014 10:31 am

Use duct tape first mate, stick it on and test drive - if the whistle stops, seal up the gap.

Noddyunplugged · Post by **Noddyunplugged** » Thu Oct 02, 2014 11:59 am

I could do as a test, but it might be a pig to take off afterwards

bb1boy · Post by **bb1boy** » Thu Oct 02, 2014 12:04 pm

Not as much as a pig to remove as unnecessary silicone..

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Thu Oct 02, 2014 12:36 pm

Silicone would come off pretty easily, because it wouldn't stick to the rubber very well at all and normally peels ok from glass.
Tiger Seal (PU sealant) would be a muffin though, so bb1boy's right with his suggestion to try tape first.

Lude Generation

Irritating high-pitch noise

Irritating high-pitch noise

Re: Irritating high-pitch noise