The 3.1 turbo diesel has about 100,000 km so we decided to check the glow plugs, better to check well the engine is not in the trooper, much easier. The glow plugs are under the inter-cooler so I removed the inter-cooler. the inter-cool was attached by four bolts and two air hoses. There is a picture showing the inter-cooler being removed. I checked the glow plugs for their resistance with a volt meter. The resistance should be around 1.3 to 1.5 ohms. All of the glow plugs were in that area. To be safe we ordered new glow plugs from the United Kingdom. When they come I well replace them.
Jonathan
