Flushin my tank - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1STtimePRo'71 · 02-07-2005, 11:53 PM

If I were to drop and flush my gas tank, how would I clean the fuel lines out?

-Cory

Also can I throw an inline fuel filter on the fuel line before the line meets the carb. Can I then do away with the filter in the carb or keep it there?

Longhorn Man · 02-07-2005, 11:53 PM

Brake clean and compressed air maybe?
Good question.

1STtimePRo'71 · 02-07-2005, 11:55 PM

What about tossing the pickup line into a bucket with some gas in it? and turning over the engine with some wires disconnected.

67ChevyC10Stepside · 02-08-2005, 12:27 AM

not to steal this thread but what are you cleaning the tank with? my blazer tank had something in it and when i dumped it out red stuff came out....was red not rust color....dunno wth it was and have been wondering what to clean it with......

**kwmech** · 02-08-2005, 12:31 AM

On my carbureted truck I put the filter under the cab where the line comes out of the floor and goes to the frame rail.

1STtimePRo'71 · 02-08-2005, 12:40 AM

That's just it. I dont know what to use to clean the tank, or what to do about the fuel lines. I suppose I could just let the fuel lines clean themselves out and replace the filters after I get some good gas rolling through them. But again what to clean the tank?

I want to put a clear inline filter in the engine compartment so that I can check the filter when I check my oil and such.

68w/sbc406 · 02-08-2005, 12:45 AM

i have heard people say dont use glass inline fiters, i have never had a problem with them but i imagine that it could hit the intake and break

1STtimePRo'71 · 02-08-2005, 12:56 AM

Well I would put a plastic one on there. Just preventative maintenance I guess.

Longhorn Man · 02-08-2005, 01:01 AM

if the glass filter is secured away from metal, it is an invaluable tool.
A fuel filter between the tank and pump is a bad idea that can cause or worsen vapro lock. It does this by causing a restriction and causing a lower pressure in the line which with lower pressure comes lower boiling point.
You can steam clean fuel tanhks, that's how our in house radiator shop does it. I did mine like so too.

67ChevyC10Stepside · 02-08-2005, 01:02 AM

dont have a steam machine....would kerosene flush work?

1STtimePRo'71 · 02-08-2005, 01:04 AM

You can steam clean fuel tanhks, that's how our in house radiator shop does it. I did mine like so too.

Longhorn Man · 02-08-2005, 08:43 PM

it takes a few hrs, but it is easy and safe. Pluss, after all that hot water went through there, cleaning out all the gas, you can solder the crack on the filler neck.

*chevytruckfan* · 02-08-2005, 08:55 PM

Eastwood sells a system of coatings that clean, treat the metal inside the tank, and then seals. This is what I plan on using in mine when I get that far and definatly in the 47.

Blue Beard · 02-08-2005, 09:57 PM

If you suspect the fuel lines have a problem, replace them and save yourself headaches in the future.

02-07-2005, 11:53 PM	#1
1STtimePRo'71 Registered User Join Date: Feb 2005 Location: Lake Crystal, MN Posts: 656	Flushin my tank If I were to drop and flush my gas tank, how would I clean the fuel lines out? -Cory Also can I throw an inline fuel filter on the fuel line before the line meets the carb. Can I then do away with the filter in the carb or keep it there?

02-08-2005, 12:27 AM	#4
67ChevyC10Stepside Registered User Join Date: Mar 2004 Location: Butler PA Posts: 3,034	not to steal this thread but what are you cleaning the tank with? my blazer tank had something in it and when i dumped it out red stuff came out....was red not rust color....dunno wth it was and have been wondering what to clean it with...... __________________ 67 c-10, 400 SB, TH350, 4.10 gears, Blazer tank,camaro tach, sidemarker fuel fill (soon) WTB: stepside parts, 67 front end parts, 67 small window cab. posi for 3.73 or 4.10 for 12 bolt and 10 bolt.

02-08-2005, 12:45 AM	#7
68w/sbc406 Got Light Emitting Diode? Join Date: Apr 2004 Location: Newberg, OR Posts: 2,485	i have heard people say dont use glass inline fiters, i have never had a problem with them but i imagine that it could hit the intake and break __________________ 1968 1/2 ton 2wd lwb 6 lug disc and bags up front. Next c notch and rear bags '02 Chevy Silverado LT ext cab short bed 2WD 5/7 drop on 22's(the family car) 1993 Cherokee work ride/weekend wheeler

02-08-2005, 01:02 AM	#10
67ChevyC10Stepside Registered User Join Date: Mar 2004 Location: Butler PA Posts: 3,034	dont have a steam machine....would kerosene flush work? __________________ 67 c-10, 400 SB, TH350, 4.10 gears, Blazer tank,camaro tach, sidemarker fuel fill (soon) WTB: stepside parts, 67 front end parts, 67 small window cab. posi for 3.73 or 4.10 for 12 bolt and 10 bolt.

02-08-2005, 09:57 PM	#14
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	If you suspect the fuel lines have a problem, replace them and save yourself headaches in the future. __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

02-07-2005, 11:53 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Brake clean and compressed air maybe? Good question.

02-07-2005, 11:55 PM	#3
1STtimePRo'71 Registered User Join Date: Feb 2005 Location: Lake Crystal, MN Posts: 656	What about tossing the pickup line into a bucket with some gas in it? and turning over the engine with some wires disconnected.

02-08-2005, 12:31 AM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,599	On my carbureted truck I put the filter under the cab where the line comes out of the floor and goes to the frame rail.

02-08-2005, 12:40 AM	#6
1STtimePRo'71 Registered User Join Date: Feb 2005 Location: Lake Crystal, MN Posts: 656	That's just it. I dont know what to use to clean the tank, or what to do about the fuel lines. I suppose I could just let the fuel lines clean themselves out and replace the filters after I get some good gas rolling through them. But again what to clean the tank? I want to put a clear inline filter in the engine compartment so that I can check the filter when I check my oil and such.

02-08-2005, 12:56 AM	#8
1STtimePRo'71 Registered User Join Date: Feb 2005 Location: Lake Crystal, MN Posts: 656	Well I would put a plastic one on there. Just preventative maintenance I guess.

02-08-2005, 01:01 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	if the glass filter is secured away from metal, it is an invaluable tool. A fuel filter between the tank and pump is a bad idea that can cause or worsen vapro lock. It does this by causing a restriction and causing a lower pressure in the line which with lower pressure comes lower boiling point. You can steam clean fuel tanhks, that's how our in house radiator shop does it. I did mine like so too.

02-08-2005, 01:04 AM	#11
1STtimePRo'71 Registered User Join Date: Feb 2005 Location: Lake Crystal, MN Posts: 656	You can steam clean fuel tanhks, that's how our in house radiator shop does it. I did mine like so too.

02-08-2005, 08:43 PM	#12
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	it takes a few hrs, but it is easy and safe. Pluss, after all that hot water went through there, cleaning out all the gas, you can solder the crack on the filler neck.

02-08-2005, 08:55 PM	#13
chevytruckfan Account Suspended Join Date: May 2004 Location: Lake Placid, Florida Posts: 930	Eastwood sells a system of coatings that clean, treat the metal inside the tank, and then seals. This is what I plan on using in mine when I get that far and definatly in the 47.



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