Does this engine have mechanical fuel injection on it?
If so, the glow plugs are on top inside with the intake manifold. You just have to unplug them to check them. Measure them with a vom. They should read 1000 to 1200 ohms.
If the engine is the electronic 7.3, the glow plugs are under the valve covers. They can be checked the same as above, but you have to get the valve covers off to get at them.
If you've been starting the engine with starting fluid, I'd bet you're going to need all 8 glow plugs regardless which engine it is. The glow plugs generally don't survive starting fluid.
Wednesday, January 2nd, 2008 AT 7:47 PM