Click on image for the lowdown. 
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| | | Forums66 Topics128,078 Posts1,056,024 Members48,433 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Aug 2008 Posts: 52 New Guy | | New Guy Joined: Aug 2008 Posts: 52 | Thanks for the heads-up that 53Moneypit posted for us new guys about searching the site before asking. Wow! Tons of info. I just bought a 51 3800, and found a brass petcock valve between the tank and the flex line. The guys at Classicparts.com said they were dealer installed, but don't know of a source. Has anyone ever come across one, and do you know of a source for replacements? It's a neat addition that I'd like to keep. | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | Welcome to the 'bolt. Most hardware stores will have brass petcocks the size you need.
Save a life, adopt a senior shelter pet. The three main causes of blindness: Cataracts, Politics, Religion. Name your dog Naked so you can walk Naked in the park.
| | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | My 3800 has a brass fitting that has a shutoff for the flexhose feed. The bottom of the brass block has a drain plug and the drain plug is not affected by the shutoff valve. If this is what yours looks like, I would suggest that it was factory installed. | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | The factory petcock did have a drain at the bottom which makes it a specialty. I'm not sure the petcock was on all models. I have seen some with a drain only. But after 50 years, who knows what has been installed. Petcocks are ok, but if you have any debris in the tank, the petcock is where it gets stuck and you starve for fuel. | | | | | Joined: Aug 2008 Posts: 52 New Guy | | New Guy Joined: Aug 2008 Posts: 52 | You have described exactly what I have. I think I can restore it, if I can't find a replacement, but the adapter to the tank broke off and I'm not sure I can get it out without damaging the valve. | | | | | Joined: Jun 2005 Posts: 46 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2005 Posts: 46 |
Last edited by wv_hillbilly; 08/06/2008 10:19 PM. Reason: added link instead of pic
| | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | That's a good picture of what they looked like when they were new. | | | | | Joined: Aug 2008 Posts: 52 New Guy | | New Guy Joined: Aug 2008 Posts: 52 | Great picture! That's exactly what I have. Do you know where I can find a replacement? | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | I don't know of any repops. A used one would either be good or bad. They really weren't bad at breaking; just filling up with debris. | | | | | Joined: Dec 2001 Posts: 14,522 Moderator: Welcome Centre, Southern Bolters, Legion Hall | | Moderator: Welcome Centre, Southern Bolters, Legion Hall Joined: Dec 2001 Posts: 14,522 | I'm not sure what the proper name for my type is but I put one on my 37 in case I had to change an underbody fuel filter. I got one at the local hardware that has a little "handle" and you simply turn it on or off....not have to spin it around. Worked real good the only time I've had to use it....and VERY nice to have. | | | | | Joined: Jul 2006 Posts: 451 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 451 | What about a motorcycle part? They have gravity fed fuel tanks and on/off valves. I do not know how many times I forgot to turn the dang things on. Cavebull | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | Gas farm tractors all had petcocks if you don't mind getting away from original looking. | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | here's a pic of the one that is on my '50 wv_hillbilly you need to read this. For those interested parties my original post addresses this problem. You will find a petcock at your local hardware store. What you won't find is one with the built in 3" nipple but the hardware store sells those too. What's shown is similar to the one on my 38 except the on/off knob was on the bottom.
Last edited by Tiny; 08/06/2008 2:02 PM. Reason: removed pic from quote
Save a life, adopt a senior shelter pet. The three main causes of blindness: Cataracts, Politics, Religion. Name your dog Naked so you can walk Naked in the park.
| | | | | Joined: Aug 2008 Posts: 52 New Guy | | New Guy Joined: Aug 2008 Posts: 52 | I rebuilt mine, and it works great. I'd be happy to share the experience with anyone that needs help. Thanks for all your support. | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | Denny, he posted pics directly into the thread. I posted the link so he could read that the practice is a no-no. Just trying to give him a heads-up before he got a nasty gram from a mod. He corrected it and all is good. 
Save a life, adopt a senior shelter pet. The three main causes of blindness: Cataracts, Politics, Religion. Name your dog Naked so you can walk Naked in the park.
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