JLM Lubricants

JLM Direct Injection Valve Cleaner


 / 500ml

  • For all petrol, GDI, hybrid & diesel engines
  • Cleans valve stems and seats
  • Cleans the combustion chamber and piston crown
  • Restores correct airflow to engine
  • Restores correct engine operation
J03190 JLM Lubricants Direct Injection Valve Cleaner

JLM Lubricants’ Direct Injection Valve Cleaner is a powerful remover of stubborn carbon-based deposits that accumulate within engine combustion chambers and behind valves, especially. This situation is prevalent on direct-injected petrol (GDI) and hybrids, but it also afflicts diesel models, which robs the engine of power, efficiency and reliability.

Product information

An unfortunate consequence of relocating fuel injectors from the intake to the combustion chamber is that the inlet valves especially are not kept clean by fresh petrol washing past them. Due to a combination of crankcase ventilation and exhaust gas recirculation deposits, carbon also builds quickly within the air inlet, effectively suffocating the engine. As these carbon deposits experience higher temperatures as they enter the cylinder-head casting, they become baked to the surface, making them especially difficult to remove.

JLM’s Direct Injection Valve Cleaner is an essential part of a multi-pronged attack on removing harmful carbon deposits that afflict modern engines. It should be used alongside JLM’s GDI Injector cleaner fuel additive (for petrol engines only) and the JLM EGR and air intake cleaner aerosol (both petrol and diesels) for best results.

JLM Lubricants’ Direct Injection Valve Cleaner’s easy to use aerosol contains dedicated cleaning surfactants to dislodge and remove baked-on carbon more effectively than alternative products that rely on solvents alone. As the cleansing solution passes into the engine, JLM’s formulation is also gentler when combusted and is harmless to particulate filters and catalytic converters.

JLM’s Direct Injection Valve Cleaner cleans not just the valves but also the complete combustion chamber. The result is enhanced engine efficiency and reduced exhaust emissions, notably carbon monoxide (CO) and hydrocarbons (HC), a benefit of which is improved cold-start performance.


This product is intended for professional use only!

JLM has designed its Direct Injection Valve Cleaner for ease of use. Instead of requiring direct access to the cylinder-head inlet tracts, the product enters the air intake of a warm running engine, thus avoiding extensive dismantling.

Shake the aerosol for at least two minutes and direct the spray into the intake in small bursts not exceeding three seconds. Never allow the cleaner to pass through the intercooler, or enter any corrugated/convoluted rubber pipes, which can cause pools to accumulate. When you have decided the best access point for the engine on which you are working, proceed as follows:

  1. Start the engine, ensure it is to its normal running temperature and run it at idle speed.
  2. Spray the product in short intervals of up to three seconds into the intake manifold. The engine speed may increase, or decrease, with each application. Allow the engine revolutions to stabilise before spraying again.
  3. Should the engine speed increase, or you notice knock/pinking/pinging, cease spraying and allow the engine to return to idle. Do not depress the accelerator.
  4. With half of the aerosol content used, allow the engine to idle for a further two minutes before continuing.
  5. When the aerosol is depleted, allow the engine to idle for a further two minutes.
  6. Stop the engine and reassemble the intake system.
  7. Start the engine again and accelerate it to 2,500rpm briefly and allow it to idle again. Repeat ten times. Alternatively, embark on a short drive of between 5-8 kms (3-5 miles).
  8. Before stopping the engine, allow it to idle again for at least one minute.
  9. JLM’s Direct Injection Valve Cleaner should be used in a well-ventilated area; both gloves and eye protection are necessary.
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JLM Lubricants

Great addition

"This is a great addition to the products in my workshop. We continuously see fantastic results in the recovery of emissions and engine performance, among other things."

- Paul Finn

JLM Lubricants


"I was very skeptical, but after using the product and starting my car, I couldn't believe my eyes ... the yellow light in my car was no longer on!"

- Kevin Kalo

JLM Fixing cars

Surprising­ly good

"I never thought that JLM would surprise me so much. It gets better and better every time. I will continue to use these products. The fantastic results speak for themselves. Keep up the great work."

- Andrew Watts


These are the most common questions we get from a potential distributor.

Do any of the JLM additives help the performance of the high pressure diesel fuel pump?

J02330 Rapid is perfect for pump and injectors!

Is it OK to use the extreme and the DPF cleaner together. ?

No, this will not have a positive effect. In fact it may cause an adverse effect. And also the risk of overdosing! Never combine fuel additives


Will BluBoost dissolve existing crystal infestation or is it more like a preventative product?

JLM’s BluBoost additive cleans and prevents crystal formation in the AdBlue dosing system. It also conditions the AdBlue fluid for a longer time to ensure proper working of the AdBlue and SCR system. This helps prevent performance loss and the often-subsequent expensive repairs. It also reduces foaming at low temperatures

Is the JLM Engine Oil Flush safe for use with wet belt engines?

Our JLM OIL FLUSH is safe to use with ‘wet belts’ (TBIO). This is mainly because we use non solvent and premium pack of oil cleaning additives.


Does the Petrol Emissions Reduction Treatment also clean the catalytic convertor?

The catalytic converter is not a filter, it functions by converting harmful emission gases into less harmful gases. The filter can become contaminated if for example there has been an oil leak, and when this happens the filter needs to be replaced. There is no additive or chemical that will remove physical contamination from a catalytic.

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