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| | | | Joined: Jun 2006 Posts: 272 Shop Shark | | Shop Shark Joined: Jun 2006 Posts: 272 | Hello, been a long time since I posted - hey, there's a photo of my truck on the left - the 1/2 ton being filled by a giant loader. Anyway, I've had my truck for over 45 years and thought I knew everything about it but the temp gauge has me stumped. Its needle is pinned to 212 all of the time. I pulled the cluster and maybe there is a spring missing that should be pulling the needle to the 100 mark? If I manually pull the needle to 100, it springs back on its little spring back to 212 when I let go. It is the original gauge, not aftermarket. Any help gladly appreciated. I will have another gauge question soon regarding the fuel gauge as well. Thank you all! [IMG]http://i23.photobucket.com/albums/b386/littlebuddytoo/48Chevy/Temp%20Gauge2.jpg[/IMG][IMG]http://i23.photobucket.com/albums/b386/littlebuddytoo/48Chevy/Temp%20Gauge1.jpg[/IMG]
Last edited by littlebuddie; 07/10/2015 10:14 PM.
1948 AD Pickup
| | | | | 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 thinking your gauge is one that has the capillary tube with the "bulb" on the end that goes into the engine head. If I'm correct then the little copper tube has a leak in it and the gas inside is gone. Some shops can put the gas back in but it can get expensive. I buy a new one cheaper than I can get the ether put back in one.....and yes, my china gauge is still holding up after 3 or 4 years. | | | | | Joined: Jun 2006 Posts: 272 Shop Shark | | Shop Shark Joined: Jun 2006 Posts: 272 | Thank you for your input Achipmunk. This topic probably shouldn't be in the electrical section but I don't know where else to post it. The capillary tube is not kinked or bent but that doesn't mean the ether has not leaked out at some point. Is the ether in the tube pressurized so it stretches the spring into tension? It takes a bit of pushing with my finger to counter the spring so the needle goes to the 100 mark. When I let go, it jumps back to 220. As I said, the unit is pinned to the 220 mark at all times so I'm wondering if there is a counter-spring that should be holding it to the 100 mark that is missing? Thank you!!
1948 AD Pickup
| | | | | Joined: Jun 2006 Posts: 272 Shop Shark | | Shop Shark Joined: Jun 2006 Posts: 272 | Oh, nevermind, i fixed it. I pressed on a piece and rebent it to change the dynamics of the spring action. Now the needle rests on 100 as it should. Tested it in boiling water with a kitchen thermometer and it works perfectly. Thank you all! http://s23.photobucket.com/user/littlebuddytoo/media/48Chevy/TG.jpg.html
1948 AD Pickup
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