Undercoating

sparky · 03-09-2012, 10:36 PM

Is undercoating really needed on the Z?
I searched but no definitive opinions so please weigh in.

370ZilverZ · 03-09-2012, 10:46 PM

If you are refering to the road debris noise from your rear wheel wells, then most of us are using Dynamat in the hatch area to remedy it.

Cabin noise

sparky · 03-09-2012, 10:53 PM

Quote:

Originally Posted by daemon1957

If you are refering to the road debris noise from your rear wheel wells, then most of us are using Dynamat in the hatch area to remedy it.

Cabin noise

More concerned with water, salt, rust.

MattP725 · 03-09-2012, 10:59 PM

I think that has long been debunked as a bs service.

370ZilverZ · 03-09-2012, 10:59 PM

Gotcha! I'm sorry I can't be of much help there. Many owners seem to put the 370 away in the winter, but there are a few die hards out there. I have not read a thread with talk of undercoating that I can recall. Most people are dead set against adding weight!

sparky · 03-09-2012, 11:28 PM

Quote:

Originally Posted by daemon1957

Gotcha! I'm sorry I can't be of much help there. Many owners seem to put the 370 away in the winter, but there are a few die hards out there. I have not read a thread with talk of undercoating that I can recall. Most people are dead set against adding weight!

Thanks for your input.

Ronin06 · 05-30-2014, 10:51 PM

I am one of those diehards, but not by choice. Undercoating will help IF it's done right. I've done my own over the years, saving money and ensuring it's done to my satisfaction.

Do not expect undercoating to quiet the Z. But it will help in protecting from road salt, sand and dirt. Just be sure you clean and dry before you apply, as with most other products.

Fountainhead · 06-01-2014, 01:07 PM

Most modern cars have a fixed lining in the wheel wells, it's designed to breathe and allow moisture to escape, it's sort of a soft nylon snap in liner that absorbs the gravel/sand noise that would hit the wheel wells and cause cabin noise.
Unfortunately, in the Z rear wheel wells, Nissan decided to forego spending 50 cents to stop the noise in our cabins. Adding anything other than that I feel won't alleviate the problem.
In my Z I added Dynamat-like soundproofing throughout the rear cabin, but on the passenger side of the vehicle the inside surface of the rear fender isn't accessible, (due to gas line passage) and it rings like a drum when rocks and gravel hit it.

kenchan · 06-01-2014, 06:36 PM

if it's your dd, keep the car outdoors after you drive. let it cool down and freeze.

dry salt doesnt do much harm. but melted snow/ice (from garages/heated garages) combined with salt =

i speak from experience.

best way to keep your Z clean in the winter is hibernation.

as for additional undercoating, dont bother. just go under the car every spring and wash the undercarriage very well, and wire brush the surface rust off, clean, and just spray some rustolium in the affected areas.

03-09-2012, 10:36 PM	#1 (permalink)
sparky Track Member Join Date: Jul 2011 Location: Vancouver, BC Posts: 642 Drives: 12 370Z GM AT Rep Power: 15	Undercoating Is undercoating really needed on the Z? I searched but no definitive opinions so please weigh in.

03-09-2012, 10:46 PM	#2 (permalink)
370ZilverZ A True Z Fanatic Join Date: Dec 2011 Location: DFW, TX Age: 67 Posts: 2,321 Drives: '11 BMW Z4 Rep Power: 18	If you are refering to the road debris noise from your rear wheel wells, then most of us are using Dynamat in the hatch area to remedy it. Cabin noise __________________ 370ZilverZ Journal BMW Z4

03-09-2012, 10:59 PM	#5 (permalink)
370ZilverZ A True Z Fanatic Join Date: Dec 2011 Location: DFW, TX Age: 67 Posts: 2,321 Drives: '11 BMW Z4 Rep Power: 18	Gotcha! I'm sorry I can't be of much help there. Many owners seem to put the 370 away in the winter, but there are a few die hards out there. I have not read a thread with talk of undercoating that I can recall. Most people are dead set against adding weight! __________________ 370ZilverZ Journal BMW Z4

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03-09-2012, 10:59 PM	#4 (permalink)
MattP725 A True Z Fanatic Join Date: May 2011 Location: Toms River, NJ Posts: 1,904 Drives: 2010 40th Rep Power: 17	I think that has long been debunked as a bs service.

05-30-2014, 10:51 PM	#7 (permalink)
Ronin06 Base Member Join Date: Mar 2014 Location: Urbandale, Iowa Posts: 87 Drives: 14 silver sport 370Z Rep Power: 11	I am one of those diehards, but not by choice. Undercoating will help IF it's done right. I've done my own over the years, saving money and ensuring it's done to my satisfaction. Do not expect undercoating to quiet the Z. But it will help in protecting from road salt, sand and dirt. Just be sure you clean and dry before you apply, as with most other products.

06-01-2014, 01:07 PM	#8 (permalink)
Fountainhead Track Member Join Date: Feb 2013 Location: FL Posts: 834 Drives: 2019 Civic Type R Rep Power: 14	Most modern cars have a fixed lining in the wheel wells, it's designed to breathe and allow moisture to escape, it's sort of a soft nylon snap in liner that absorbs the gravel/sand noise that would hit the wheel wells and cause cabin noise. Unfortunately, in the Z rear wheel wells, Nissan decided to forego spending 50 cents to stop the noise in our cabins. Adding anything other than that I feel won't alleviate the problem. In my Z I added Dynamat-like soundproofing throughout the rear cabin, but on the passenger side of the vehicle the inside surface of the rear fender isn't accessible, (due to gas line passage) and it rings like a drum when rocks and gravel hit it.

06-01-2014, 06:36 PM	#9 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	if it's your dd, keep the car outdoors after you drive. let it cool down and freeze. dry salt doesnt do much harm. but melted snow/ice (from garages/heated garages) combined with salt = i speak from experience. best way to keep your Z clean in the winter is hibernation. as for additional undercoating, dont bother. just go under the car every spring and wash the undercarriage very well, and wire brush the surface rust off, clean, and just spray some rustolium in the affected areas.