Where is the fuel overflow valve located volvo d12

Follow the fuel lines from the fuel filter housing to the head. The overflow valve should be on the front side of the head, where the supply should go around the back. I'm not too familiar with the D12, but that's how mine is on the D16. It's under the radiator overflow tank, right below the valve cover.

 

No, it should be a hex head banjo bolt where the line comes from the head. It's below the level of the valve cover on the engine, not inside of it. Mine is on the front of the engine near the fan, but I think some engines might have them on the driver side at the front of the engine. Just follow the lines from the fuel filter housing and you should find it. Once you see the bolt, you can determine if you can just remove and replace, or if you need a flex/swivel ratchet or remove some parts to access it.

http://www.hhrvresource.com/VolvoDo...nuals/D13/Fuel Overflow Valve Replacement.pdf

 

Volvo d12 fuel problems makeing the engine stall out

Look at the pictures from post #6. Where that fuel line goes into the head is the valve that you want to replace. Should be super easy.

 

Hello. I have a 2005 Volvo FM12 D12 engine. It's refusing to start and it's saying fuel feed pressure low. I start it by removing the boost sensor from the manifold with something flammable and I starts right away when I swing the key. No diesel is returning to the tank through the fuel return line. Any ideas? I changed both pumps and non return lines already and the problem is still there. And I lost some power as well