I am about to change out my glow plugs. I am tired of the cold starts and PITA hard starting during winter time. When the temp gets around 45 degree i have to plug in my truck. I have replaced my batteries, GPR, Starter within the past couple months. Still have the cold starts. I bet the Glow plugs or harnesses are going out. I was looking over reviews and so a lot of helpful articles. I found the motorcraft glow plugs but wasn't sure if it would be smarter to get the whole glow plug replacement kit. Is it necessary or smarter to change the gaskets, harnesses and plugs at once. The truck has 171,000 miles on it and would be willing to bet these have never been replaced. Any help would be great.