Bonnet insulation / sound absorption

[oldgitdave]

I notice that my eHybrid doesn't have a sound insulation mat fixed to the underside of the bonnet. Is there any particular reason for it not having one to anyone's knowledge? I realise the 1.4 tsi is very quite when running under normal conditions but it does get a bit noisy when accelerating hard. Thought it may worth fitting one to make a very quiet car even quieter.

 

[Ninjakebab]

That's weird. My 1.4 hybrid has one albeit a small one.
Is yours the VZ (245) or the non-VZ?

 

[oldgitdave]

That's weird. My 1.4 hybrid has one albeit a small one.
Is yours the VZ (245) or the non-VZ?

Mine's a V2. Perhaps they only fit them to the VZ's?

 

[Ninjakebab]

It would appear so! Good news is the mat already exists for an easy upgrade. Wonder what it'll cost

 

[oldgitdave]

I've emailed SEAT Motor Parts who are on here and it's under £30 + postage so not too bad at all. I'm going to order one.

 

[Doogle]

I've emailed SEAT Motor Parts who are on here and it's under £30 + postage so not too bad at all. I'm going to order one.

Let us know if you hear any audible difference?

 

[oldgitdave]

I will indeed. It should arrive tomorrow all being well.

 

[oldgitdave]

Arrived this morning and took me no more than 5 minutes to fit. Not likely to be using the ICE before Monday so will report back on sound levels then.

 

[Doogle]

Arrived this morning and took me no more than 5 minutes to fit. Not likely to be using the ICE before Monday so will report back on sound levels then.
View attachment 32646

I have a V2 allegedly “On the way” be interested to see if it arrives with one fitted

 

[oldgitdave]

I have a V2 allegedly “On the way” be interested to see if it arrives with one fitted

I hope you get it soon .

 

[martin j.]

One of the first thing I remove from my cars, excess weight, and holds heat in, if the engine too loud, turn up the stereo?

 

[Doogle]

One of the first thing I remove from my cars, excess weight, and holds heat in, if the engine too loud, turn up the stereo?

“Excess weight” jeez how heavy are they?

 

[/dev/null]

V2 150 arrives yesterday - hasn't got any fitted.

 

[Doogle]

V2 150 arrives yesterday - hasn't got any fitted.

Ahh well looks like mine won’t have one then, tbh martinj. Might have a point regarding heat dissipation

 

[oldgitdave]

One of the first thing I remove from my cars, excess weight, and holds heat in, if the engine too loud, turn up the stereo?

“Excess weight” jeez how heavy are they?

Must be less than 1kg

Ahh well looks like mine won’t have one then, tbh martinj. Might have a point regarding heat dissipation

I really can't see that heat dissipation in the VZ being any different to our V2's. Similar if not the same engine on the 245 Hybrid VZ2 isn't it? The others are bigger lumps so potentially more heat and they have the insulation fitted
Anyway, to me the car looks unfinished without it, even if it doesn't really do that much. You decide

 

[Doogle]

Must be less than 1kg

I really can't see that heat dissipation in the VZ being any different to our V2's. Similar if not the same engine on the 245 Hybrid VZ2 isn't it? The others are bigger lumps so potentially more heat and they have the insulation fitted
Anyway, to me the car looks unfinished without it, even if it doesn't really do that much. You decide
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No I agree a big empty space that needs filling, weather we have I doubt heat’ll be that big an issue

 

[Supa Koopa]

Obviously I'm just guessing, but they may put it on the VZ 310's as those turbos produce a lot of heat and maybe it was affecting the bonnet paintwork.

 

[Ninjakebab]

If an engine has heat issues because of bonnet padding, then I think it has other problems. There should be convection to such a high degree that it shouldn't matter at all.

Insulation to protect the bonnet is a much more relevant point when talking heat.

The primary role is no doubt soundproofing.

 

[raylee25]

If an engine has heat issues because of bonnet padding, then I think it has other problems. There should be convection to such a high degree that it shouldn't matter at all.

Insulation to protect the bonnet is a much more relevant point when talking heat.

The primary role is no doubt soundproofing.

If you drive faster, you will increase the airflow into the engine compartment. No more heat problems.

 

[oldgitdave]

Let us know if you hear any audible difference?

Well, first journey since fitting the sound absorber today with the ICE running. A motorway run down the M1 and I can honestly report that I noticed no noise difference whatsoever . I don't think my hearing is as acute as it used to be though, spending all my working life developing and testing jet engines . Ah well I still think it was a worthwhile buy at the price and, as said before, it looks much better under the bonnet with it fitted.