Getting fuel on floor near pedal cluster on my '74.... |
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Getting fuel on floor near pedal cluster on my '74.... |
tommott77 |
Dec 18 2012, 09:23 PM
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#1
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Newbie Group: Members Posts: 15 Joined: 1-September 08 From: Wilmington, NC Member No.: 9,495 Region Association: None |
...Is the only source for a leak in that area from the tank itself?
After doing a good bit of research here tonight it seems that only the 75 and 76s had extra fuel lines, filters, and pumps up front under the tank, and that my '74 should only have the two lines under the tank, which are new, on the passenger side of the car. I also believe that the hard lines run through the tunnel and don't come near the driver side of the car..... Perhaps leaving only the tank as the possible culprit? |
Mikey914 |
Dec 18 2012, 09:43 PM
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#2
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The rubber man Group: Members Posts: 12,671 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
...Is the only source for a leak in that area from the tank itself? After doing a good bit of research here tonight it seems that only the 75 and 76s had extra fuel lines, filters, and pumps up front under the tank, and that my '74 should only have the two lines under the tank, which are new, on the passenger side of the car. I also believe that the hard lines run through the tunnel and don't come near the driver side of the car..... Perhaps leaving only the tank as the possible culprit? I'd bet you probably need to change the hose / filter under the tank too. Pull the inspection panel in the front trunk. Disconnect the battery just to assure you have no source of ignition and work backwords, you probably would be looking at replacing the plastic fuel lines in the tunnel. Stainless is a good option. The gas will disolve the tar and create a mess if it sits too long, as well as being dangerous. |
FourBlades |
Dec 18 2012, 09:43 PM
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#3
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From Wreck to Rockin Group: Members Posts: 2,055 Joined: 3-December 07 From: Brevard, FL Member No.: 8,414 Region Association: South East States |
I probably don't need to say this, but don't drive it until you figure this out. I would not park it in your garage either.
Too many of these cars have burned up. If you still have the old plastic fuel lines in the tunnel they could be cracked. I was not sure from your message if you replaced those. Otherwise, it sounds like the rubber hoses under your tank may be cracked or not sealing well. There are different diameter lines needed (which is a stupid design to me) and if you try to clamp the larger one where the smaller one belongs they will leak. Seems like they are 10mm and 8mm. 10mm to the larger nipple in the tank and then 8mm to the fuel filter (?). Some vendor sells a hose that is 10mm on one end and 8 mm on the other. I am not making this up. (IMG:style_emoticons/default/smile.gif) John |
Dave_Darling |
Dec 18 2012, 09:50 PM
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#4
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914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
The lines under the tank and the center tunnel lines are more likely culprits than the tank itself for fuel on the floorboard.
--DD |
tommott77 |
Dec 18 2012, 10:29 PM
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#5
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Newbie Group: Members Posts: 15 Joined: 1-September 08 From: Wilmington, NC Member No.: 9,495 Region Association: None |
...Is the only source for a leak in that area from the tank itself? After doing a good bit of research here tonight it seems that only the 75 and 76s had extra fuel lines, filters, and pumps up front under the tank, and that my '74 should only have the two lines under the tank, which are new, on the passenger side of the car. I also believe that the hard lines run through the tunnel and don't come near the driver side of the car..... Perhaps leaving only the tank as the possible culprit? I'd bet you probably need to change the hose / filter under the tank too. Pull the inspection panel in the front trunk. Disconnect the battery just to assure you have no source of ignition and work backwords, you probably would be looking at replacing the plastic fuel lines in the tunnel. Stainless is a good option. The gas will disolve the tar and create a mess if it sits too long, as well as being dangerous. From the searching on the forum I did tonight I was under the impression that '74s do not have the filter under the tank, is that not correct? I also did a quick looksee for the inspection panel that I found referenced in some other threads. I didn't see and assumed that my '74 didn't have one. Is there one, and if so where would it be located? The tunnel seems dry btw. The fuel seems to be emanating from in front of pedal assembly leaking through the front firewall separating the hell hole from the cabin. |
FourBlades |
Dec 18 2012, 10:34 PM
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#6
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From Wreck to Rockin Group: Members Posts: 2,055 Joined: 3-December 07 From: Brevard, FL Member No.: 8,414 Region Association: South East States |
This may sound stupid but could it be brake fluid and not gasoline? The brake master cylinder could be leaking right at the front wall next to the pedals. If you are sure it is gasoline, I would drain and remove the tank to see what is up. John |
ChrisFoley |
Dec 18 2012, 10:49 PM
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#7
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I am Tangerine Racing Group: Members Posts: 7,933 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
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Mikey914 |
Dec 18 2012, 10:58 PM
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#8
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The rubber man Group: Members Posts: 12,671 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Agreed. If it's brake gas you can smell it, if it's an oily substance, bad master cylinder. Either way tyhe fuel lines (if they are original) will eventualy need to be replaced. Chris has them.
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mepstein |
Dec 19 2012, 06:46 AM
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#9
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914-6 GT in waiting Group: Members Posts: 19,296 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
(IMG:style_emoticons/default/agree.gif) Happened to me over the summer. |
ripper911 |
Dec 19 2012, 07:06 AM
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#10
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corde pulsum tangite Group: Members Posts: 2,920 Joined: 25-April 10 From: Powder Springs, GA Member No.: 11,654 Region Association: South East States |
A while back I had a rust spot on the gas tank that developed into a leak, but it dripped out from under the car instead of into the cabin. If it is fuel, check the spots where the tank is against other surfaces for rusting which can cause a leak.
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tommott77 |
Dec 19 2012, 07:45 AM
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#11
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Newbie Group: Members Posts: 15 Joined: 1-September 08 From: Wilmington, NC Member No.: 9,495 Region Association: None |
No doubt it's fuel....unless if the previous owner managed to find a way to run the brake hydraulics off of some sweet swelling 93 octane.
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TheCabinetmaker |
Dec 19 2012, 07:51 AM
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#12
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I drive my car everyday Group: Members Posts: 8,301 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
There are two short pieces of metal tubing that go from the rubber hoses under the tank, thru the rubber grommet, and connect to the plastic hoses thru the tunnel. I'm betting the leak is at the plastic line to metal tubing in the tunnel. Pull the carpet from the tunnel by the pedal to expose a small inspection plate. With a mirror and flashlight, you can see in the tunnel. Sounds like its time for all new lines and hoses.
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r_towle |
Dec 19 2012, 09:32 AM
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#13
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Custom Member Group: Members Posts: 24,584 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
pull the tank out and replace the rubber hoses that go from the tank to the plastic fuel lines in the tunnel.
I bet you will find those are cracked and leaking, and the gas is running down the outside of the fuel line into the tunnel... The lowest spot on the floor is underneath the pedal cluster. rich |
Dave_Darling |
Dec 19 2012, 12:03 PM
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#14
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914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
From the searching on the forum I did tonight I was under the impression that '74s do not have the filter under the tank, is that not correct? That is correct. The 74 cars originally had the pump and the filter located under the engine shelf, like the 70-73 cars. A relatively popular modification is to move the pump up to where the steering rack lives, but it probably has not been done on the majority of 70-74 cars. If it's fuel, only two real possibilities: - The fuel lines in the center tunnel are leaking - The fuel tank has rusted (or abraded, but much less likely!) to the point where there is a hole, and the gas is finding its way into the cabin instead of under the car. Possibly through another rust or abrasion hole. ....Or, if someone installed aftermarket equipment like a stereo, air conditioning, alarm, or some such, the installer could have run a screw into the tank... Similar things have been known to happen. --DD |
tommott77 |
Dec 19 2012, 01:07 PM
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#15
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Newbie Group: Members Posts: 15 Joined: 1-September 08 From: Wilmington, NC Member No.: 9,495 Region Association: None |
Welp...had a couple minutes today and pulled the tank and it was indeed the culprit. The leak is the 2" wide wet spot in the center of the photo. Rusted straight through. Looks like the fuel was leaking down the little shelf that that part of the tank sits on, and made its way into the cabin through the steering rack cavity.
Not sure if this is good news or bad news. The good news is I don't have to worry about going through the pain in the arse of changing/feeding lines through the tunnel. The bad news is that one of the radiator shops in town that I was going to take it to to boil and patch is closed from Dec 13th -Jan 7th, apparently they can go a month every year sans any income, and the other spot in town mystifialbly just closed down. Attached image(s) |
walterolin |
Dec 19 2012, 01:20 PM
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#16
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Senior Member Group: Members Posts: 685 Joined: 30-November 11 From: Louisville, Ky Member No.: 13,838 Region Association: South East States |
Change the tunnel lines while you have the tank out. They are plastic and 40 years old. My lines inside the engine compartment literally crumbled in my hands when I pulled them this summer.
Rust and gas fires are the enemies of the teener. And doofuses running into you from behind. Olin |
Elliot Cannon |
Dec 19 2012, 01:26 PM
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#17
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None |
Get some fuel lines from Tangerine Racing. Replacing the isn't really that big of a job. Even if it is a pain in the ass, it affords great piece of mind. I used truck brake lines but that was before I new pre-bent ss lines were available. CHANGE THE FUEL LINES. (IMG:style_emoticons/default/biggrin.gif)
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montoya 73 2.0 |
Dec 19 2012, 02:20 PM
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#18
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Lack of consideration to others, and Selfish! Group: Members Posts: 1,791 Joined: 27-October 04 From: Paso Robles, Ca. Member No.: 3,016 Region Association: Central California |
+1 on what Elliot says! I will be changing my lines this winter also.
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toolguy |
Dec 19 2012, 02:26 PM
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#19
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Senior Member Group: Members Posts: 1,270 Joined: 2-April 11 From: San Diego / El Cajon Member No.: 12,889 Region Association: Southern California |
"Change the tunnel lines while you have the tank out. They are plastic and 40 years old. My lines inside the engine compartment literally crumbled in my hands when I pulled them this summer. "
[/color] Take the time and do the complete job. . . pulling the tank it the hardest part. . you're more than 1/2 way there. . It's all about being safe. . . . and keeping us from saying "I told you so" if the car burns up later |
914itis |
Dec 19 2012, 02:45 PM
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#20
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Advanced Member Group: Members Posts: 2,892 Joined: 9-October 10 From: New York City Member No.: 12,256 Region Association: North East States |
Change the fuel lines!
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