JLM Injector Loosener

500ml / J04210
  • Dissolves rust, dirt and (soot) deposits
JLM Injector Loosener

JLM's Injector + Spark Plug Loosener is especially useful for freeing seized delicate parts. It is strong enough to break apart the bond between two components but is sufficiently gentle to reduce the chance of later damage.

Product information

Using excessive force to remove a seized component can be counterproductive. While breaking a stud, by attempting to unscrew a heavily corroded nut, is not always a catastrophe, the cost and effort involved in extracting a snapped spark plug, fuel injector, or glow plug can be considerable.

For a variety of reasons, these components' threads and those of the cylinder-head can fuse together. The result is a powerful bond that is inaccessible. Rather than using physical force to separate them, JLM Lubricants offers its chemical expertise as a solution.

JLM Lubricants' Injector + Spark Plug Loosener works by contracting the area to which it is applied, by chilling it rapidly up to -40 degrees Celsius. This sudden temperature change breaks the fused surfaces apart, by promoting micro-cracking. JLM's injector + spark plug loosener also incorporates a powerful PTFE-based lubricant, which reduces stress on the component, by reducing friction while the part is extracted. Extra benefits include a potent corrosion inhibitor additive and a composition that is free from both acids and silicone.


The generously filled aerosol and its precision nozzle facilitate easy and accurate application. Ensure that the area, on which you are working, is as clean as possible and free from corrosion flakes. Should it not damage the component, disconnect any electrical wiring and pre-clean the area with a wire brush.

Shake the 400ml JLM Injector + Spark Plug Loosener aerosol for at least two minutes, prior to directing the spray at the desired component and noting the resultant chilling effect. Never touch the area with bare skin to verify the falling temperature, because you risk frostbite injury. Allow a short period for the product to weaken the corrosion bond. You may have to repeat the application, before using appropriate tools to apply sufficient breakaway torque.

While JLM's Injector + Spark Plug Loosener adds a PTFE lubrication function to aid removal, after the part has loosened, it does not guarantee against component breakage if you apply excessive force afterwards. Therefore, use any pullers judicially. Should you need to unscrew the part, turn the component in both clockwise and anti-clockwise directions, which helps to free the bond further and reduces friction between the threads.

Consider cleaning the threads with a suitable tool, before refitting the component. JLM's injector + spark plug loosener also leaves an anti-corrosion film behind, protecting the exposed threads from oxidation, until the part is replaced.

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