name of sound proofing under engine cover?

[Les Norton]

Not had the 1.9TD A4 B5 Diesel estate for long and as i always do when getting a new motor is change glow plugs and do a service. When i took off the plastic engine cover there is a material that i can only think is soundproofing, its breaking down and falling to pieces - tried to find the part on the net but can't, however it maybe cause i don't know what the stuff is called. Any ideas please?

[green A8]

If it's the same as our B5's Les, I'd describe it as foam. It's about 20/25mm thick and as you have discovered it seems to like breaking up, and making quite a (hidden) mess. I'm not sure where you could source a replacement, you could try a local upholsterer. I am pretty sure that Audi will want to sell only a complete unit. (Engine cover with foam attached), no doubt for an eye watering sum! I looked arouund at several second hand covers from our local breakers yards. Only to discover they were all in pretty much the same state. In the end I simply stripped out all of the remaining foam from our existing cover and put it back on the engine. I can't say i noticed much of an increase in sound level with the engine running. But then most of the soundproofing material had long since fallen off!

[Les Norton]

Interesting didn't think of leaving it out completely, may just try that, does it rattle without? - only paid £600 for the car and as i made £200 profit on selling my old car, it only owes me £400, bought it as a stop gap as i have a dodgy knee but am starting to like the car, wanted a volvo s80 but couldn't resist the audi and as my sister said, she pays £200 per month for her new car so it only needs to last 2 months! - have had it 3 months and in daily use so am in profit haha, I am replacing the gearbox oil and filter plus engine oil and filter and glow plugs tomorrow before heading off to Cornwall on Sunday so a nice 15 hour run for it - that'll test it out!


If it's the same as our B5's Les, I'd describe it as foam. It's about 20/25mm thick and as you have discovered it seems to like breaking up, and making quite a (hidden) mess. I'm not sure where you could source a replacement, you could try a local upholsterer. I am pretty sure that Audi will want to sell only a complete unit. (Engine cover with foam attached), no doubt for an eye watering sum! I looked arouund at several second hand covers from our local breakers yards. Only to discover they were all in pretty much the same state. In the end I simply stripped out all of the remaining foam from our existing cover and put it back on the engine. I can't say i noticed much of an increase in sound level with the engine running. But then most of the soundproofing material had long since fallen off!

[green A8]

15 hour run Pah! The Audi will scoff at that and probably give it's very best MPG performance!! You'll then be so pleased with it that you'll keep it for ever:D

It made no difference to the car that I stripped the foam off the engine cover then replaced cover on engine. no rattle at all from the engine cover, but as stated above most of the foam had simply broken up and made a God awful mess. I suppose you could try soundproofing felt, I've seen some at classic car shows intended for the bulkhead area of the engine bay. With a silver foil type heat shield layer on one side, it might be worth a try, I'd check that it could stand the heat of the engine first though.

[Les Norton]

15 hour run Pah! The Audi will scoff at that and probably give it's very best MPG performance!! You'll then be so pleased with it that you'll keep it for ever:D

It made no difference to the car that I stripped the foam off the engine cover then replaced cover on engine. no rattle at all from the engine cover, but as stated above most of the foam had simply broken up and made a God awful mess. I suppose you could try soundproofing felt, I've seen some at classic car shows intended for the bulkhead area of the engine bay. With a silver foil type heat shield layer on one side, it might be worth a try, I'd check that it could stand the heat of the engine first though.

Back from Cornwall did 900 miles didn't miss a beat and ran lovely UNTIL coming back in to Cumbria, following lorries with loads of spray and heavy rain. Car decided to not accelerate although it would maintain the speed, when pressing down to overtake it did not respond so dropped back and when we came out of the rain it started to respond and then after about 20 miles it picked up and accelerated as normal with kick down - I had stripped out the engine soundproofing prior to going to Cornwall - Wonder if its a coincidence or if water got in somewhere?

[JimC64]

Hi there, we use a guy on my Jag forum that specialises in this stuff, albeit he's based in the States.....he calls it hoodliner material and he uses "aircraft firewall material"

He also does some crazy spectacular one off custom jobs, which I know you're not necessarily interested in, but he reckons this material is better than stock, applied using a 3M spray glue iirc

You can try a search on hoodliners. net or try looking for "dynamat" which is another material used for under bonnet liners

Hope it helps

Jim

[Les Norton]

Hi there, we use a guy on my Jag forum that specialises in this stuff, albeit he's based in the States.....he calls it hoodliner material and he uses "aircraft firewall material"

He also does some crazy spectacular one off custom jobs, which I know you're not necessarily interested in, but he reckons this material is better than stock, applied using a 3M spray glue iirc

You can try a search on hoodliners. net or try looking for "dynamat" which is another material used for under bonnet liners

Hope it helps

Jim

Thanks Jim have googled hoodliner and the unfortunately the poor guy looks like he has serious problems so wouldn't pester him with my trivial matters quote:
"Due to an unforeseen medical issue I am unable to accept orders for hoodliners right now. I am undergoing
I.V. chemotherapy for stage 4 pancreatic cancer and hope to beat it! I've lived a clean life and am fairly
strong so my docs are positive that I'll get through this. As soon as I get the OK from them I'll re-establish
the STORE page so that I can fulfill orders once more. I'm hoping to be back up and running some time in May."

[JimC64]

Thanks Jim have googled hoodliner and the unfortunately the poor guy looks like he has serious problems so wouldn't pester him with my trivial matters quote:
"Due to an unforeseen medical issue I am unable to accept orders for hoodliners right now. I am undergoing
I.V. chemotherapy for stage 4 pancreatic cancer and hope to beat it! I've lived a clean life and am fairly
strong so my docs are positive that I'll get through this. As soon as I get the OK from them I'll re-establish
the STORE page so that I can fulfill orders once more. I'm hoping to be back up and running some time in May."

Yes Les I know, its such a shame, we're all thinking good thoughts for him, thats for sure.

The reason I posted that was for info only, I didn't think you'd be contacting the US for this, you say its only a runaround, maybe I'm wrong?
If so I apologise

From the many posts I've seen on this on our forum, you can simply buy Dynamat or similar, clean and prepare the area and use 3M spray glue adhesive to apply as required.

Might be an option to consider?

Or something like this.....

Sound Proof Insulation Sheet Car Van Bonnet Boot Floor (120x94cm) Self Adhesive | eBay (http://www.ebay.co.uk/itm/Sound-Proof-Insulation-Sheet-Car-Van-Bonnet-Boot-Floor-120x94cm-Self-Adhesive-/350986988731?pt=LH_DefaultDomain_3&hash=item51b8746cbb)

[Les Norton]

Yes Les I know, its such a shame, we're all thinking good thoughts for him, thats for sure.

The reason I posted that was for info only, I didn't think you'd be contacting the US for this, you say its only a runaround, maybe I'm wrong?
If so I apologise

From the many posts I've seen on this on our forum, you can simply buy Dynamat or similar, clean and prepare the area and use 3M spray glue adhesive to apply as required.

Might be an option to consider?

Or something like this.....

Sound Proof Insulation Sheet Car Van Bonnet Boot Floor (120x94cm) Self Adhesive | eBay (http://www.ebay.co.uk/itm/Sound-Proof-Insulation-Sheet-Car-Van-Bonnet-Boot-Floor-120x94cm-Self-Adhesive-/350986988731?pt=LH_DefaultDomain_3&hash=item51b8746cbb)

Hi Jim, didn't contact him, just googled him - the stuff im looking for is the soundproofing that goes under the plastic engine cover, rather than stick on stuff, not sure what temperature it gets up to under the cover?