Adam:

The new bosch glowplugs I have sitting on the window ledge waiting installation on my Volvo are 0.6 ohm each. 3 ohm is probably too high.

Hard to check, takes a couple seconds for my digital ohm meter to respond.

A glowplug that shows infinity cold very likely has the filament detached from the tip, and if it does heat, it will heat the side of the "point" rather than the tip. Pretty much useless.

You can tell by looking at them -- a neat little hole in the tip means the weld failed. A blister on the side of the tip means the filament is grounding on the side rather than the tip.

I only use Bosch glowplugs these days, and the Volvo eates them, too. Champions burned out in a couple years.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!