Has anyone heard of glow plugs seizing in the heads on older D-max's due to corrosion? A friend of mine who is a truck sales manager told me about this. He had been told by a tech that it is a problem starting to show up at their dealership in New England.

Having a 2001 D-Max with 131,000 miles, I decided to take a chance and carefully pull my glow plugs and "Never-Seeze" the threads. I was succesful with 7 plugs but the #8 cyl plug I left in because the 8 mm nut that holds the wire on was rusted and I would have damaged the plug removing it (just like I did on the #6 cyl plug!). So my other question is should I replace just the 2 glow plugs or replace all eight because of their age and milage? The truck starts fine and the other 6 plugs measure .5-.7 ohms on the bench.