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Slightly OT, Sound Deadening Coating?

 
  #1  
Old 04-29-2016, 01:57 PM
Baatzy
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Slightly OT, Sound Deadening Coating?

Hey all,

Just wondering if anyone around here knows of a good roll on type coating that is tough, kinda like a bed liner, but also a sound deadener. I am trying to get my '79 F150 finished up and would like to put some sort of liner/sound deadener on the floor boards instead of having to find a new vinyl or carpet section.

Thanks,

Baatzy
 
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Old 04-29-2016, 03:10 PM
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  #3  
Old 04-29-2016, 08:14 PM
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Ceramic Microspheres

I read some post a while back were people were mixing this stuff with latex paint as a more budget friendly alternative to lizard skin.
 
  #4  
Old 04-30-2016, 09:38 AM
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Most anything thick and soft will help - like Plasti Dip. The inexpensive versions of the chassis pad should work similar enough to the fancy name brands.
 
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Old 04-30-2016, 03:53 PM
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Tugly (Rich), I remember a post a while back where you were talking about a sound deadening spray IIRC that people were putting on VC's to quieten injector noise. Do you remember what that spray was and are you going to do that on your OBS engine that is going in Stinky?
 
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Old 05-01-2016, 11:09 AM
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A member used hi-temp Line-X on the valve covers. Given that the injectors are the loud part of the engine, this makes sense to me - and I am researching what I will use.
 
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Old 05-01-2016, 08:42 PM
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Do you know what the clearance is between the inside of the valve cover and the rocker arm at its' highest moment of motion?
 
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Old 05-01-2016, 08:53 PM
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I think he means the outside of the valve cover.
 
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Old 05-01-2016, 08:53 PM
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Thank you, Rich. Let us know what you decide if you will..


Originally Posted by Y2KW57 View Post
Do you know what the clearance is between the inside of the valve cover and the rocker arm at its' highest moment of motion?
No clue. I'll be doing o-rings in about three weeks. If this goes unanswered, I'll use a square and measure if you'd like.

Do you have something for the inside of the VC in mind?
 
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Old 05-01-2016, 08:58 PM
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I thought Rich was going to have the high temp linex INSIDE the valve cover. It would be far more effective at reducing sound if applied inside the valve cover rather than outside. But I worried about clearance over the entire excursion of the rocker arm, when everything is expanded from heat.
 
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Old 05-01-2016, 09:03 PM
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The specs say that the standard Line-X is good to about 250F. They have another that will withstand 350F (commercial grade). I think the 250F product would not be sufficient. What do you guys think about the 350F product.

Would you want to put that inside the engine if there was enough clearance?
 
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Old 05-01-2016, 09:17 PM
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NO, not at only 350F rating, which probably should be downgraded with constant emersion in oil mist combined with high cyclic mechanical vibration. I'd want a much higher tolerance / margin over and above assumed oil temp spikes as high as 275 degrees.

I think some engines do have bumpy coatings inside valve covers for sound dampening. I forget which engines they are though.
 
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Old 05-02-2016, 06:20 AM
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I agree and appreciate your input. So, do you think that the 350F rating is high enough for external use?

Hopefully this is also relevant for the OP's intended use as well.

Do the new 6.7's have any type of coating either inside of the VC's or externally to dampen noise?

I do realize that it is a totally different type of injection system....
 
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Old 05-02-2016, 07:11 AM
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Yeah... outside. For the reasons Y2KW57 listed, it never entered my mind to put the liner inside the valve covers.

As for the magic of the modern quiet diesels - it's the injectors that get them there. I haven't look at the 6.7L for a long time, but everything I recall looked like a normal engine. I would guess that they don't have magic valve covers.

I saw a video of an injector flow bench one time, and realized that's where the distinctive 7.3L sound comes from.
 
 
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