Gas tank swishing sound when cornering - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**chewychevy67** · 01-28-2016, 11:12 PM

Is there any coating you can use on an in-cab gas tank that will make the swishing sound quiet down in the cab? Relocating the tank is not an option. Just would be nice to find a way to quiet it lot or even a little.

**LockDoc** · 01-28-2016, 11:26 PM

Quote:

Originally Posted by chewychevy67

Is there any coating you can use on an in-cab gas tank that will make the swishing sound quiet down in the cab? Removing the tank is not an option. Just would be nice to find a way to quiet it lot or even a little.

You would have to pretty much remove the tank to apply any kind of coating otherwise you could only get it on one side and I don't think that would do much good.

LockDoc

brad_man_72 · 01-28-2016, 11:29 PM

Stick chunks of gas tank foam down the filler neck.
Lizard skin/dynomat on the outside of tank might help.

**chewychevy67** · 01-28-2016, 11:29 PM

It's for my build. The cab is in body shop stage. I just remember from when I drove it how annoying that sound was. I have a new tank sitting here and was just thinking while it was not installed yet what I could do to help this stay quiet. I know it still needs to ground out so I would mask where the cab bolts to it off.

**LockDoc** · 01-28-2016, 11:38 PM

Quote:

Originally Posted by chewychevy67

It's for my build. The cab is in body shop stage. I just remember from when I drove it how annoying that sound was. I have a new tank sitting here and was just thinking while it was not installed yet what I could do to help this stay quiet. I know it still needs to ground out so I would mask where the cab bolts to it off.

.. I thought when you said that removing the tank was not an option that it was already installed and you didn't want to remove it from the truck....

LockDoc

**chewychevy67** · 01-28-2016, 11:37 PM

Yeah dynomat might help. What is lizard skin? A paint on or a stick on?

**chewychevy67** · 01-28-2016, 11:40 PM

Sorry my bad. I meant moving the gas tank to the rear frame under the bed. That would be the ultimate way, I just did not want 20 guys to throw that out.sorry. I edited my first post to relocating not removing.

**allchevy58** · 01-29-2016, 01:11 AM

I put Dynomat on mine, then put the factory cardboard over it and I can't hear the gas moving around anymore.

**chewychevy67** · 01-29-2016, 01:14 AM

Awesome. Just one the one side facing the seat or all around? If all around did the tank fit nice and snug after

Aus69c20 · 01-29-2016, 07:00 AM

x2 on the dynomat option.
Without removing the tank I put a dynomat style product on first with a high density foam over the top. I did this on one side only and now I can barely hear it. Well worth it.

**Already Gone** · 01-29-2016, 07:44 AM

Hey Rod, keep it full of gas and you don't get any swishing

**allchevy58** · 01-30-2016, 01:42 AM

Yes, just the one side.

89AKurt · 01-31-2016, 10:23 PM

Huh, thought this was the charm of these trucks.

Now I'll have to obsess about doing this.

davepl · 01-29-2016, 02:59 PM

I have dynamat strips (don't bother covering the whole thing, it's not insulation, doesn't work that way) and then the factory tank carpet, because I have buckets.

This has two purposes - the dynamat "deadens" the tank wall and the carpet is sound insulation.

Keeping the tank more full might help as well. Less room for the contents to slosh around in.

My Dad had to keep the tank level below 3/4 or gas would splash out of the filler neck and onto his shoulder, and since he smoked a pipe, that was dangerous. I suppose he -could- have fixed it, but he just chose to run less gas....

engineer_gregh · 01-29-2016, 08:48 PM

I bought my insulation at Home Depot, its called Frost King. Comes in a roll and is sticky on one side. No more fuel sloshing noise.

01-28-2016, 11:12 PM	#1
chewychevy67 Senior Member Join Date: Jan 2010 Location: Here Posts: 5,551	Gas tank swishing sound when cornering Is there any coating you can use on an in-cab gas tank that will make the swishing sound quiet down in the cab? Relocating the tank is not an option. Just would be nice to find a way to quiet it lot or even a little. Last edited by chewychevy67; 01-28-2016 at 11:40 PM.

01-28-2016, 11:29 PM	#3
brad_man_72 the boat guy Join Date: Jul 2007 Location: springfield mo Posts: 2,339	Re: Gas tank swishing sound when cornering Stick chunks of gas tank foam down the filler neck. Lizard skin/dynomat on the outside of tank might help. __________________ 67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project,

01-28-2016, 11:29 PM	#4
chewychevy67 Senior Member Join Date: Jan 2010 Location: Here Posts: 5,551	Re: Gas tank swishing sound when cornering It's for my build. The cab is in body shop stage. I just remember from when I drove it how annoying that sound was. I have a new tank sitting here and was just thinking while it was not installed yet what I could do to help this stay quiet. I know it still needs to ground out so I would mask where the cab bolts to it off.

01-28-2016, 11:37 PM	#6
chewychevy67 Senior Member Join Date: Jan 2010 Location: Here Posts: 5,551	Re: Gas tank swishing sound when cornering Yeah dynomat might help. What is lizard skin? A paint on or a stick on?

01-28-2016, 11:40 PM	#7
chewychevy67 Senior Member Join Date: Jan 2010 Location: Here Posts: 5,551	Re: Gas tank swishing sound when cornering Sorry my bad. I meant moving the gas tank to the rear frame under the bed. That would be the ultimate way, I just did not want 20 guys to throw that out.sorry. I edited my first post to relocating not removing.

01-29-2016, 01:11 AM	#8
allchevy58 Senior Member Join Date: Aug 2011 Location: Reno, Nv. Posts: 1,440	Re: Gas tank swishing sound when cornering I put Dynomat on mine, then put the factory cardboard over it and I can't hear the gas moving around anymore. __________________ 1927 Willy's Knight 24,000 original miles, 1958 Impala 283/Powerglide, 1971 Monte Carlo 350/350, 1972 GMC K2500 350/350, 1976 Chev. K10 350/350, 2006 GMC Sierra 2500HD LBZ Duramax/Allison, 2006 Chev. Silverado K3500 LBZ Duramax/Allison

01-29-2016, 01:14 AM	#9
chewychevy67 Senior Member Join Date: Jan 2010 Location: Here Posts: 5,551	Re: Gas tank swishing sound when cornering Awesome. Just one the one side facing the seat or all around? If all around did the tank fit nice and snug after

01-29-2016, 07:00 AM	#10
Aus69c20 Registered User Join Date: Jun 2015 Location: Melbourne, Australia Posts: 231	Re: Gas tank swishing sound when cornering x2 on the dynomat option. Without removing the tank I put a dynomat style product on first with a high density foam over the top. I did this on one side only and now I can barely hear it. Well worth it. __________________ John 69 c20, 396, th400, dana60, ps, ac

01-29-2016, 07:44 AM	#11
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,143	Re: Gas tank swishing sound when cornering Hey Rod, keep it full of gas and you don't get any swishing __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

01-30-2016, 01:42 AM	#12
allchevy58 Senior Member Join Date: Aug 2011 Location: Reno, Nv. Posts: 1,440	Re: Gas tank swishing sound when cornering Yes, just the one side. __________________ 1927 Willy's Knight 24,000 original miles, 1958 Impala 283/Powerglide, 1971 Monte Carlo 350/350, 1972 GMC K2500 350/350, 1976 Chev. K10 350/350, 2006 GMC Sierra 2500HD LBZ Duramax/Allison, 2006 Chev. Silverado K3500 LBZ Duramax/Allison

01-31-2016, 10:23 PM	#13
89AKurt Registered User Join Date: Dec 2015 Location: Prescott Arizona Posts: 621	Re: Gas tank swishing sound when cornering Huh, thought this was the charm of these trucks. Now I'll have to obsess about doing this. __________________ 1968 Long Bed 2016 Honda Civic Coupe EX-T ticket magnet

01-29-2016, 02:59 PM	#14
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Gas tank swishing sound when cornering I have dynamat strips (don't bother covering the whole thing, it's not insulation, doesn't work that way) and then the factory tank carpet, because I have buckets. This has two purposes - the dynamat "deadens" the tank wall and the carpet is sound insulation. Keeping the tank more full might help as well. Less room for the contents to slosh around in. My Dad had to keep the tank level below 3/4 or gas would splash out of the filler neck and onto his shoulder, and since he smoked a pipe, that was dangerous. I suppose he -could- have fixed it, but he just chose to run less gas.... __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

01-29-2016, 08:48 PM	#15
engineer_gregh Registered User Join Date: Feb 2012 Location: Smyrna TN Posts: 1,153	Re: Gas tank swishing sound when cornering I bought my insulation at Home Depot, its called Frost King. Comes in a roll and is sticky on one side. No more fuel sloshing noise. Attached Images __________________ 1971 Longbed BB Cheyenne Super 1972 Longbed SB Cheyenne Super 1972 Longbed Highlander Custom Deluxe 1975 K5 4x4 full convertible Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=645165 Greg Smyrna TN

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