Putting the Quiet in QL

[Shrewcub]

Originally Posted by J-Mech

Yeah..... but probably not next to a hot motor.

Ya good point. If the lead melts, you've overheated it. Kinda like the tabs junkyards put on freeze plugs.

[J-Mech]

Originally Posted by Shrewcub

Ya good point. If the lead melts, you've overheated it. Kinda like the tabs junkyards put on freeze plugs.

LOL. Voided warranty?

[johncub7172]

Why not fix the rattles correctly? There are a list of parts that wear, or become out of adjustment that cause this.

If the lead sheet were covered with metal, I don't see the engine getting so hot to melt the lead. Our machines {non-tractors, but same principal} all have lead in the middle of steel for noise reduction.

[OldSchool81]

I am used to the teeth shaking, ear bleeding, brain scrambling noises my 1250 makes. It helps to forget about a bad day or to get back at the neighbors for letting their dogs bark all night. I get started early too.

[samiam44]

J mechanic,

No need to be rude.

I did not use spray adhesive, but hi temp contact cement. I think it is rated to 185f.

Since the paint does not char, I expect it will hold up fine.

No rattles, just making it quieter than factory. Not for the restoration croud.

[darkminion_17]

The stuff they make magnetic signs with would work no glue needed,they are easy to find for free on the side of trucks and vans at the home center.

[J-Mech]

Originally Posted by samiam44

No rattles, just making it quieter than factory. Not for the restoration croud.

Originally Posted by johncub7172

Why not fix the rattles correctly? There are a list of parts that wear, or become out of adjustment that cause this.

You can say rude if you want to..... but I'm more of a fix the problem kind of guy than I am a re-invent the wheel. Seems like johncub7172's answer makes more sense than putting lead sheets inside the hoods. I dunno..... If you thought the muffler on your car was bad, would you line the inside of the car with foam or.... lead..... or just put a new muffler on? You could have done some simple things with material that cost less than the lead sheets and accomplished the same thing. I just don't understand your approach.... it's not about not being "factory".... it just doesn't make any sense.

[samiam44]

The lead was $40 and adhesive was free. You really need to look at what frequencies are loud. All the lower freq stuff, the lead is much more effective. Foam, decoupled loaded mass, dynacrap etc.

The P7100 cummins guys have found this makes a 10 db drop 1 ft off the oil pan.

My muffler is fine. currently the mower deck is louder than the tractor.


Might be unconventional-but I tell you it is highly effective in the driver's seat.

M

[J-Mech]

Originally Posted by samiam44

Might be unconventional-but I tell you it is highly effective in the driver's seat.

So are ear plugs.

[64fleetside]

A metal panel can "drum" under vibration, it's called resonance-same thing what makes a trumpet work. The lead sheets or even a high mass asphalt sheet can stop the drumming, making them quieter. Doesn't really take a full covering either, just a small size pad in the center usually.
New cars have small pads glued everywhere to prevent this type noise. They are big for the boom-boom stereo guys too.
Even if everything was bolted down perfectly, those type pads will dampen some noise.