Diesel Fuel Pump Seal Leak Fix
![]() Peter Maher – The Man Behind Liquid Intelligence
You can call Peter now on 1800441163 or 02 8188 2060 (7am to 7pm seven days a week – including public holidays – except Christmas Day) for a chat about product and application information or to simply purchase Liquid Intelligence.
Direct From The ManufacturerLiquid Intelligence Ptyc Ltd Australian Enquiries: Free Call
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Do You Have A Leaking Diesel Fuel Pump?This Might Cost A Lot Of Money To FixThis Is Your Best First Option Alternative To Save You Time And Money.
“Liquid Intelligence 229 Will Fix Diesel Fuel Pump Leaks by Swelling and Softening And Rejuvenating Nitrile Fuel Pump Seals. Guaranteed.”It Really Does Do Exactly What It Says
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Whilst some seal leaks can be substantial, and will require the diesel pump to be replaced or serviced. Most leaks are minimal and don’t need to be mechanically repaired. If your leak is similar to this one then Liquid Intelligence 229 Diesel Fuel Pump Seal Leak Fix would be a logical alternative to an otherwise very expensive repair.
Liquid Intelligence 229 Diesel Fuel Pump Seal Leak Fix – Video On How It Works
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Successfully Fixes Diesel Fuel Pump Leaks. Recommended For:
Recreational![]() |
Light Commercial![]() |
Heavy Commercial![]() |
Road Haulage![]() |
Earth Moving![]() |
Cranes![]() |
Late Model![]() |
Work![]() |
Forklifts![]() |
Farm Machinery![]() |
Boats![]() |
Ships![]() |
The Liquid Intelligence 229 Diesel Fuel Pump Seal Leak Fix formulation contains a unique combination of ester and phenol additives. When added to diesel fuel, the ester and phenol chemical combination swells and rejuvenates nitrile diesel fuel pump seals – completely eliminating leaks.
Application Ratio: One litre of Liquid Intelligence 229 per 10 to 20 litres of diesel fuel.
Who Is This Product For?
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Motor mechanics with clients who cannot afford a mechanical fix |
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Home users… application is simply to add into the fuel tank. |
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Diesel truck operators who do not like the down-time required for mechanical repair. |
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Diesel owners who wish to try an inexpensive first option (with a proven history of success) before out-laying hundreds of dollars (and perhaps thousands of dollars) on a mechanical repair. |
If Your Diesel Shows Signs Of Leaking Seals There Are Two Options Available |
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Option 1: Replace or Recondition the Fuel Pump![]() Mechanic Replacing a Fuel Pump This is the most expensive and time-consuming solution. It involves either replacing the entire pump with a reconditioned or brand new unit.
The exact price depends on the type of pump:
In most cases, a diesel mechanic will need the vehicle for at least two days to remove, replace, and reprogram the pump. Some models may take longer depending on complexity and parts availability. |
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Option 2: Seal Rejuvenation with Liquid Intelligence 229This solution is especially effective for older diesel engines where seal fatigue is common but the pump is otherwise functioning normally. A Diesel Leak Repair Can Be As Simple As Adding One Litre Of Liquid Intelligence 229 To Your Fuel Intake. Liquid Intelligence 229 Is Successfully Used On Diesel Cars, 4WDs, Light Commercials, Semi-Trailers, Stationary Engines (Generators and Pumps) and Boat Engines. |
Summary: Fuel Pump Seal Leak – Your Two Main Options
Option One: | Option Two: | |
Feature | Replace/Rebuild Pump | Treat with Liquid Intelligence 229 |
Typical Cost | $2,500 – $5,000+ | Under $200 |
Vehicle Downtime | 2-4 days (mechanic workshop time) | None – vehicle stays on the road |
Invasive Repair | Requires pump removal, possible ECU recalibration | No dismantling or mechanical work required |
Success Rate | Guaranteed if full rebuild done properly | High success rate if seals are aged but not damaged |
Suitable For | Pumps with internal damage or total failure | Pumps leaking due to hardened or dried seals |
Ease of Application | Workshop-only | Do-it-yourself add-to-tank treatment |
Liquid Intelligence 229 Is Your Best First Option To Fix Your Diesel Pump Seal Leak. Here’s Why…
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A cheaper alternative to an otherwise very expensive mechanical repair |
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High success rates… Easy and safe to use |
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Ten years of proven results. |
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The Liquid Intelligence 229 rejuvenation process can extend seal life for years. |
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Recommended by seal specialists as the best first option alternative. |
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Made in Australia and comes with my money back guarantee |
What Is The Cause Of Most Diesel Fuel Pump Leaks?

Depleted Rubber Seal

Over time, all inner and outer diesel fuel pump seals can shrink, harden, and start to leak. This is usually caused by the gradual loss of plasticisers— essential compounds that keep the seals flexible, resilient, and leak-tight.
That’s exactly the kind of issue Liquid Intelligence 229 was formulated to resolve. It penetrates deep into the seals, reactivating their original chemistry and restoring lost flexibility and volume. In many cases, this stops leaks entirely—eliminating the need to recondition or replace the pump and potentially saving you thousands in repair costs.
Now, it’s important to understand that most leaking seals aren’t mechanically damaged—they’re just dry and hardened with age. In these cases, where the seal is still structurally intact but has lost flexibility and is weeping or dripping fuel, Liquid Intelligence 229 can often restore it. By rejuvenating the rubber, it helps bring back the seal’s original shape, flexibility, and sealing performance.
However, if a seal is damage—but is not physically broken — Liquid Intelligence 229 may not completely stop the leak, but it can substantially reduce it. In many cases, that level of improvement may be acceptable as a practical and cost-effective solution.
Here’s How It Works:


Dripping Diesel Fuel Pump
Diesel fuel pump seals are usually made from a material called NitrileButadiene Rubber — also known as NBR. About 20% of an NBR seal’s makeup consists of plasticisers — chemical compounds that make the material soft,elastic and durable.
Over time, plasticisers degrade, evaporate, or leach out. As a result, the rubber seal becomes brittle, loses its flexibility and shape, and eventually begins to leak.
Liquid Intelligence 229 is formulated with a targeted blend of compounds—primarily phenol esters—a class of chemicals originally used in seal manufacturing to impart elasticity, compression strength, and long-term durability. When introduced into the diesel fuel, these compounds are transported to the dry, hardened seals, where they penetrate the porous rubber and are gradually absorbed. This infusion replenishes lost plasticisers, restoring the seal’s flexibility, volume, and structural integrity. As the seal recovers its original shape and resilience, its ability to maintain an effective seal is restored—often eliminating the source of the fuel pump leak.
Of course, this isn’t an exact science—every leaking diesel fuel pump is different, with varying levels of wear and seal degradation. However, customer feedback has been overwhelmingly positive. Most users report that Liquid Intelligence 229 effectively stopped their leaks and kept their fuel pumps running leak-free for years.
So, if your diesel fuel pump is leaking and you’re facing a costly repair, it may be well worth trying Liquid Intelligence 229 first.
It could be the cost-effective solution you’ve been looking for.
Liquid Intelligence 229 – Diesel Fuel Pump Seal Leak Fix is Smart, Simple and Proven.
How to Use Liquid Intelligence 229 for Fuel Pump Seal Repairs
Liquid Intelligence 229 is highly effective in repairing leaking fuel pump seals. The correct dosage depends on the severity of the leak:
Minor Leak or Seep: Use 1 litre of Liquid Intelligence 229 per 20 litres of fuel.
Dripping Leak: Use 1 litre per 10 litres of fuel for the best results.
Step-by-Step Application Process
1. Add 1 litre (one full can) of Liquid Intelligence 229 to approximately 10 litres of diesel in the fuel tank.
2. Circulate the Treatment: Drive the vehicle back and forth a few times — your driveway will do just fine—and include a few firm stops. This helps splash-mix the treatment thoroughly with the diesel fuel.
Drive or idle the vehicle up to temperature to mix the treatment with the fuel and allow it to reach the fuel pump.
3. Soak the Seals: Turn off the vehicle and let the treated fuel sit in the pump for about an hour.
4. Re-Pressurize the Pump: Start the vehicle and let it idle for 10 minutes to re-pressurize the system. Then switch it off again and allow it to sit for another hour.
5. Repeat the Process: Continue this cycle throughout the day, re-pressurizing the pump every hour to ensure the treatment effectively infuses into the seals.
Why Frequent Re-Pressurization Is Important
The key to success is keeping the treated fuel in contact with the seals under pressure. If the pump is not re-pressurized every hour, the Liquid Intelligence 229 cannot fully infuse into the seals and restore their flexibility.
Expected Results
- Most leaks are sealed within one day of treatment.
- If the leak persists, continue the process for an additional day, repeating as necessary.
- The effectiveness of the treatment depends on the condition of the seals, but success rates are extremely high.
[I was happy to receive these kind words in a recent email] Hi PeterI purchased your product 229I have an old Nissan 2.7 diesel 4×4It was dripping diesel from the fuel pump which gradually was getting worse. I bought your product and did this…. emptied the tank down to about 10 litres ( maybe a bit less ) added 229 and mixed thoroughly with a short but rough drive. left for 5 days drove for about 10km and left again for 3 days added fuel to 1/2 tank drove again 10km left again for 3 days drove again 10km left for 3 days filled tank and have have used daily since including 2 big trips. Not ONE drop of diesel has dripped. VERY HAPPY. Regards Chris. |
[And another recent thank you email]Peter I purchased a liter of your 229 diesel fuel pump leak repair and put it in my case ih CX100 your product is amazing. I followed the instructions and left the tractor idle for several hours over a two day period and leaking stopped.I was getting ready to have the pump replaced you saved me thousands of dollars. thankyouDonald Swartz Ringtown Pennsylvania ![]() |
Liquid Intelligence A Trusted Brand.Open Road….NRMA’s bi-monthly Magazine Open Road is exclusive to NRMA Members. It’s jam packed with the issues affecting motorists right now, up-to-the-minute car advice, and inspirational travel stories and ideas. It also contains the latest news about NRMA, and product information of trusted brands that could benefit NRMA members. Liquid Intelligence is one of those trusted brands that advertises in the open road. |
Full Product SupportFor any questions about the use of this product, feel free to chat by phone: 1800 441 163 or 02 8188 2060 (7am to 7pm seven days a week – including public holidays – except Christmas Day) |
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We Are Unique… Nobody Else Does This… Call As Often As Needed—We’re Always Here To Help!… From Start to Finish—”BEFORE, DURING & AFTER”, We’re Here to Help Every Step of the Way!Whether you have questions before, during, or after using our products, our technical support team is ready to assist you from 7am to 7pm seven days a week. |
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Peter Maher’s Minchinbury Warehouse Office Webcam
Webcam Minchinbury Office Webcam: Call Peter, he is in the office today. We are open 7am to 7pm seven days a week – including public holidays – except Christmas Day Sydney time.
CALL NOW TOLL FREE FROM ANYWHERE IN AUSTRALIA ON
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![]() Peter Maher – The Man Behind Liquid Intelligence
You can call Peter now on 1800441163 or 02 8188 2060 (7am to 7pm seven days a week – including public holidays – except Christmas Day) for a chat about product and application information or to simply purchase Liquid Intelligence.
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Written by Peter MaherPeter Maher, has been in the chemical industry since he was 18. So that’s more than 40 years he’s been blending, manufacturing and formulating functional automotive and industrial fluids. |
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