Thread: Sagging bonnet lining

Mine is doing the same, not badly but can see it rubbing. Not sure what to do with it as it seems to be held up with pop rivets also. I suspect it is just age and heat gets to the integrity over the years. Removal would be the best, so then you could use a contact glue maybe on it.
Cheers Scott

Originally Posted by schuy1

Mine is doing the same, not badly but can see it rubbing. Not sure what to do with it as it seems to be held up with pop rivets also. I suspect it is just age and heat gets to the integrity over the years. Removal would be the best, so then you could use a contact glue maybe on it.
Cheers Scott

Hi Shuy1 and Scott,
Maybe I have an idea for you. I used it to treat the same problem.

I used some of the flat steel strapping that comes off pallets of bricks and the like.

When you take down the liner, you can see folded metal "ridges" under the bonnet. I drilled suitably spaced holes on them and in the metal straps, then used fairly long pop rivets to attach the steel straps through the underside of the liner, and into the "frame" above it (and under the bonnet).

If you carefully make the holes in the steel strap a tiny bit closer together than the holes you want to rivet into, you can set one rivet and then insert the next a bit obliquely into its holes. Then push the rivet sideways to make it vertical, stretching the strapping taut at the same time.
IF the strapping rubs on the acoustic cover (or anything else), you can stick some felt or leather onto the underside of it.

I found that the strapping holds the liner up pretty well.
AndrewMilne

Please be aware..... we have a 1998 Defender with a 300TDi and the thin felt type ((different to yours?) sound proofing under the bonnet. That had started sagging (they all do) but unknown at time it had then dropped on to the turbo.

My wife was driving down a motorway when a lot of smoke came from under the bonnet. She pulled over safely and peeped carefully under the bonnet to see that the sound proofing felt was actually alight!


Oh, and a powder fire extinguisher is not much use when aiming upwards!

The Yak.

Originally Posted by The Yak

Please be aware..... we have a 1998 Defender with a 300TDi and the thin felt type ((different to yours?) sound proofing under the bonnet. That had started sagging (they all do) but unknown at time it had then dropped on to the turbo.

My wife was driving down a motorway when a lot of smoke came from under the bonnet. She pulled over safely and peeped carefully under the bonnet to see that the sound proofing felt was actually alight!


Oh, and a powder fire extinguisher is not much use when aiming upwards!

The Yak.

So, Yak,
does that mean that your turbo had had it's heat shield removed???

I solved the problem with my 91 RRC by replacing the underbonnet material with self adhesive stuff which was much neater than the original and worked really well. It didn't fall off in 8 years anyway.
You should be able to get it on Ebay easily.
Regards Philip A

Originally Posted by AndrewMilne

So, Yak,
does that mean that your turbo had had it's heat shield removed???

Good point! It must have been on the exhaust.


I did not see it. When my wife got the flame out and the soundproofing was reduced to just smouldering she cut it out with a knife, gave it a good soaking and disposed of it.


A good place to fit flammable soundproofing!