Gas Spillage in Corners

[blazer72]

Obviously the first thing I did it buy a new gas cap - twice. Tried three different caps, all did the same thing
when I take a curve or a right turn, gas spills out the filler neck. WTF?

[Monte Carlo Man]

So we are talking about a '72 Blazer here?

[blazer72]

Originally Posted by Monte Carlo Man

So we are talking about a '72 Blazer here?

Sorry, nope, my 71 LWB Fleetside.

[cheyenne shortstep]

I had the same problem but didn't want to give up my old gas cap. So I bought a six dollar cap at Kragens and swapped the gasket.

[scrapmetalart]

Originally Posted by cheyenne shortstep

I had the same problem but didn't want to give up my old gas cap. So I bought a six dollar cap at Kragens and swapped the gasket.

Good idea.

I dont fill my tank up all the way to try & avoid the spilage...

[leddzepp]

Have you inspected the filler neck? A lot of times they are cracked from 40+ years of gas filler nozzles being leaned on while filling the tank.

[71gmcburb]

check the vent tube had the same problem on my 66 econoline and that was the problem

[Constructor1]

I am having the same problem on my 1970. My problem stems from the fact that some "Jackleg" mangled the top of the neck before she was mine. There is only 1 "ear" left for the cap to grab. Has anyone ever replaced just the fill neck? If so how would I go about it?

[Classic Heartbeat]

The problem is a worn filler neck. You can double up the gasket, or you can use a stant locking gas cap witch seals better. Sometimes you can just back the cap off untill the dogs come out of the notches. That will hold the cap down harder, or you can replace the tank.

check the vent tube had the same problem on my 66 econoline and that was the problem

Trucks don't have vent tubes on the filler neck.
WES

[dixietruck71]

Trucks don't have vent tubes on the filler neck.
WES[/QUOTE]

my truck has a vent tube on the filler neck of the stock tank, its he EEC evap emission style tank

[matthew20061]

Our 70' has the same problem with gas leaking out of the gas cap if its filled all the way, think I'll try the double gasket trick to see if that fixes it.

[BLACK AND BLUE 67-72]

Yep sounds like a worn neck, either new tank or double the gasket on the cap

[blazer72]

never thought to double up the gasket. You guys kick ass - I have 3 or 4 caps laying around. cheap fix if it works.

thanks fellas.

[flashed]

I have a new tank and a new cap and it still spills out the neck.I may also try the double gasket idea.

[oldblue1968chevy]

Mine did it also, locking gas cap at a yard sale for $1. I love an old truck.

[blazer72]

Originally Posted by oldblue1968chevy

Mine did it also, locking gas cap at a yard sale for $1. I love an old truck.

yeah, I had a locker when I got it, I hate them so I took it off, it probably didn't leak. Don't know if I still have it.

I am trying the double seal tomorrow.

[dixietruck71]

last week i bought some 3/16" thick gasket material from the auto part store. cut out a gasket and put it over the old one and it works awesome. No more leak. The cap is tight as hell though, but its better than a gas stain on the bed and cab corner. The gasket material was $3.49 and was about 12" x 16" square

[3118tim]

looking for 72 blazer rear hatch strikers.
Any leads?

[shiner2001]

My 72 leaks like a sieve after a fill up too. When I take a right turn I can look in the mirror and just see dollars gurgling out of the filler neck. It's a locking gas cap, which I don't like, so I think I'll try a new one and add an extra layer of gasket in there as well. Or I could just install that Blazer tank that I ordered and have been staring at for the last few months...hmmmmm...

[blazer72]

added a second gasket, filled the tank, and..................................PRESTO! No more leaks. Now I can paint the truck.

THANKS FELLAS!

[breezy]

I have a 71. Do these trucks not have a vent at all? Wouldn't pressure build up inside tank? It does have a tube on yhe passenger side in the corner of cab, is this the vent? If so where does it exit the cab? Since we were on the subject, I thought I would ask.

[Shyguy]

Originally Posted by breezy

I have a 71. Do these trucks not have a vent at all? Wouldn't pressure build up inside tank? It does have a tube on yhe passenger side in the corner of cab, is this the vent? If so where does it exit the cab? Since we were on the subject, I thought I would ask.

The gas tank on my '71 is vented through the charcoal canister that is just outside the battery in the fender. The vent goes from the tank then to the right corner of the cab and then down through the floor and then to the charcoal canister.

[dixietruck71]

Originally Posted by breezy

I have a 71. Do these trucks not have a vent at all? Wouldn't pressure build up inside tank? It does have a tube on yhe passenger side in the corner of cab, is this the vent? If so where does it exit the cab? Since we were on the subject, I thought I would ask.

my factory gas cap is vented their is a small hole from the inside you can suck air through it easily but cant blow throigh it very well at all. i do have the vent tube on the pass side but dont know where it gos either. i dont have a charcoal can on mine but gramps may have yanked it out.