Sound Deadening Engine Cover?

[Hulk311]

Any advice on sound deadening an engine cover?

I'm thinking of putting damplifier pro underneath it and either heat wave pro or thermal block on top of that? Would this be a bad idea, as in would it cause the engine to keep it's heat and build up temp to an unsafe level?

Also, what would be the best way to lower the noise level in the engine bay? There is no way I can put damplifier pro or spectrum sludge on the engine bay firewall because there is already some sound deadening material there that is impossible to take off. If I just put a few layers of heat wave pro/thermal block on the firewall engine bay side would that work? Also, how about putting damplifier pro underneath the hood?

What is the main difference between thermal block and heat wave pro and what are some examples of where you would put one and not the other?

Thanks for any advice.

[Joseph Chambers]

You can do the hood and add heatwave pro on top of that! That cover i would say no.

[Second Skin]

The cover would most likely hold the heat inside (although Lexus uses an engine cover on some models so check them out to see how they do it).

Damplifier Pro or Spectrum will both old up inside the engine bay just fine, both on the firewall and the hood with Heat Wave Pro on top of it would be our recommendation.

The difference between Heat Wave pro and Thermal Block is that the HWP is fire retardant and a jute insulating material while the Thermal Block is a reflector which reflects up to 800 degrees of heat away from the area treated (used on hood undersides to keep the top side paint from heating up and bubbling or above catalytic converters to keep the heat from coming up through the floor).

So basically use Damplifier/Damp Pro/or Spectrum first on hood and firewall area and then Heat Wave Pro on top of that in both areas. Also on the inside cabin side of the firewall you can add a layer of Luxury Liner Pro to give it a good noise/thermal barrier inside too (LLP is much more effective than HWP as a noise barrier but LLP is not recommended to be used under the hood).

Let us know if you have any other questions for your build.