Duramax Misfire Under Load and Idle – Broken Glow Plug RemovalNovember 29, 2014 10:46 am Chevrolet, TIME-SERT Kits
DenLorsTools.com Summary: Duramax diesels that have misfires at low RPM’s and under a load could have faulty glow plugs. In extreme temperatures like in the middle of the summer or winter these type of problems are more likely to occur. In extreme winter weather is when most of our customers report issues. Usually when trying to change a glowplug a common problem is breaking. That’s when our phones start ringing and the most orders for our W900-0199’s come in through our two websites (DenLorsTools.com and WiseAutoTools.com). We are providing this tech article to inform our customers about options for removing broken glow plugs without removing the cylinder head.
Another tool kit that we often sell together with the W900-0199 is the Time Sert 5000 thread repair kit. Usually the removal of broken glow plugs does not damage the threads for the glowplugs. It’s importanat to note that the thread tap in the W900-0199 is not the correct thread pitch (meaning coarse or fine) as the Duramax, because the W900-0199 is actually made for the Sprinter 5Cyl. engine. The W900-0199 has an M10x1.0 tap and the Duramax uses M10x1.25 thread size for their glow plugs. If the threads are damaged in the process of removing the broken glow plugs in the Chevy Duramax, the time Sert 5000 kit can install a solid bushing type insert that accepts the new glow plug perfectly. The Time Sert 5000 kit uses an M10x1.25 aluminum insert and works for 2001 to 2010 Duramax engines. That’s why some of our customers will purchase the W900-0199 and then if the threads are damaged they purchase the Time Sert 5000. Some go ahead and purchase both at the same time so they are prepared. It’s important to realize that these are two separate kits.