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Ultimate Oil Separation • 2012–2020 4JJ1-TC & 4JJ1-TCX 3.0L • PV644DPK
🛡️ Essential Protection for Your 4JJ1 Diesel 🛡️
Your first line of defence against oil contamination, carbon sludge, and expensive engine damage. Built for serious diesel owners chasing long-term reliability.
✅ Engineered specifically for 4JJ1-TC and 4JJ1-TCX crankcase systems
How It Works: The ProVent separates oil and air from crankcase blow-by gases, preventing oil contamination of the intake and intercooler. Cleaned air is recirculated, while captured oil can be drained or optionally returned safely to the sump. This protects turbochargers and vital components from carbon build-up while maintaining optimal engine performance.
Key Features:
💡 Why This Matters: Modern diesels with EGR systems are prone to carbon build-up. When crankcase oil vapour mixes with dirty exhaust gases, it creates sludge that blocks manifolds and valves—choking performance and risking major engine issues. The 4JJ1 is a workhorse engine, but it needs protection from EGR contamination. The ProVent prevents this, keeping your 4JJ1 engine clean, efficient, and powerful—saving you thousands on future repairs.
The 4JJ1 needs protection from EGR contamination. The D-MAX and MU-X's 4JJ1 engine (both TC and TCX variants) is a capable and reliable workhorse—but like all modern diesels with EGR, it's vulnerable to intake contamination. Oil vapour from blow-by mixes with sooty EGR gases, creating thick sludge that coats everything in your intake system.
Benefits:
💡 4JJ1 Protection: The 4JJ1 engine (3.0L turbo diesel) powers both D-MAX utes and MU-X SUVs—it's Isuzu's workhorse engine designed for serious work and towing. The TC and TCX variants share similar crankcase ventilation systems. By preventing oil vapour from mixing with EGR gases, the ProVent stops carbon sludge buildup and protects your turbo, intercooler, and intake system. Essential protection for maintaining this reliable engine's performance and longevity.
ProVent Ultimate Catch Can:
Performance:
✅ Vehicle-specific components for direct fitment on 4JJ1 engines
Recommended: Competent qualified mechanic or experienced DIYer
DIY Time: 2–3 hours
Installation Notes:
Important: Detailed installation guide included. Can be installed independently or as part of a comprehensive protection package. Professional installation recommended if not experienced with automotive work.
Maintenance Schedule:
💡 Pro Tip: The D-MAX and MU-X are serious workhorses—whether you're using them for towing, work, or family duties. Regular ProVent maintenance takes just minutes and prevents the expensive intake system cleaning that EGR-equipped diesels often require. Keep your 4JJ1 breathing clean for legendary Isuzu reliability.
Q: Will this void my Isuzu warranty?
A: No. When installed correctly, a ProVent catch can does not void the vehicle's warranty. Aftermarket protection devices don't void warranty under Australian Consumer Law. This kit protects your engine without interfering with factory components.
Q: Will this kit fit all 4JJ1 D-MAX and MU-X models?
A: Yes! This kit suits Isuzu D-MAX with 4JJ1-TC (2012–2017) and 4JJ1-TCX (2012–2020) engines, plus MU-X with 4JJ1-TC/TCX (2013–2020). Both TC and TCX variants share similar crankcase ventilation systems and use the same catch can kit.
Q: What's the difference between 4JJ1-TC and 4JJ1-TCX?
A: The TCX is an updated version with Variable Geometry Turbo (VGT) for improved performance and efficiency. Both share the same basic architecture and crankcase ventilation system, so one catch can kit fits both variants.
Q: Why does the 4JJ1 need a catch can?
A: The 4JJ1 uses an EGR system that recirculates sooty exhaust gases into the intake. When oil vapour from blow-by mixes with these sooty gases, it creates thick carbon sludge that coats your intercooler, manifolds, and intake valves. A catch can prevents the oil vapour from mixing with EGR gases, stopping this expensive problem.
Q: What is EGR carbon sludge and why is it a problem?
A: EGR (Exhaust Gas Recirculation) introduces sooty exhaust gases into your intake for emissions control. When this soot mixes with oil vapour from crankcase blow-by, it creates a sticky, tar-like sludge that builds up in intercoolers, intake manifolds, and on intake valves. This restricts airflow, reduces power, increases fuel consumption, and eventually requires expensive cleaning or component replacement.
Q: How does the ProVent prevent this sludge?
A: By capturing ~98% of oil vapour BEFORE it enters the intake system, the ProVent prevents the oil from mixing with EGR soot. Clean air (without oil) can handle the soot much better—it doesn't stick and build up like oily sludge does.
Q: How often do I need to drain the catch can?
A: Check every 5,000–10,000 km. Drain frequency depends on your driving conditions and engine condition. The 4JJ1 typically collects moderate amounts of oil. If you've configured the optional sump return line, oil automatically recirculates and you rarely need to drain manually.
Q: Does the ProVent return oil to the sump automatically?
A: The kit includes components for an optional sump return line. You can configure it to either: (a) collect oil in the catch can for periodic draining, or (b) return clean oil back to the sump automatically for closed-loop operation. Your choice based on preference.
Q: Can I install this myself?
A: If you're mechanically competent and comfortable working with hoses and brackets, yes. Most DIYers complete installation in 2-3 hours using the included 4JJ1-specific brackets. Otherwise, any qualified mechanic can handle it. A detailed installation guide is included.
Q: Will this improve performance or fuel economy?
A: While not primarily designed for performance gains, keeping your intake system clean helps maintain optimal engine efficiency. By preventing sludge buildup, the ProVent helps your 4JJ1 maintain factory performance levels over time—especially important as the vehicle ages.
Q: How does this affect crankcase pressure?
A: The ProVent includes integrated crankcase pressure regulation. This maintains optimal crankcase pressure, reducing blow-by risk and preventing excessive pressure that can cause oil leaks. Proper pressure regulation is critical for engine longevity.
Q: What happens to my turbocharger without a catch can?
A: Oil vapour coats the turbocharger compressor wheel with a sticky film. Over time, this reduces efficiency and can cause imbalance. The ProVent keeps the compressor wheel clean, extending turbo life—important for maintaining the 4JJ1's performance.
Q: How often should I replace the filter element?
A: Replace the MANN+HUMMEL filter element every 40,000 km. Replacement elements are readily available. This is a simple maintenance item that ensures continued high performance.
Q: What is MANN+HUMMEL media?
A: MANN+HUMMEL is a world-leading manufacturer of filtration systems, supplying OEM filters to major automotive manufacturers. Their filtration media is engineered for maximum efficiency and longevity—professional-grade quality.
Q: Can I use this with other protection systems?
A: Yes! Many D-MAX and MU-X owners run both a fuel pre-filter (or post-filter) AND a ProVent catch can for comprehensive protection. They protect different systems—fuel filtration protects your injectors, while the ProVent protects your intake system.
Q: Is this suitable for towing and heavy loads?
A: Absolutely essential. The D-MAX and MU-X are serious workhorses designed for towing and heavy loads. These conditions increase blow-by and make oil vapour separation even more critical. The ProVent is built for exactly this kind of demanding work.
Q: What about intercooler cleaning?
A: By preventing oil vapour from entering the intake, the ProVent dramatically reduces intercooler fouling. Many diesel owners without catch cans find their intercoolers eventually need professional cleaning—an expensive service. The ProVent prevents this problem before it starts.
Q: Will this reduce smoke?
A: Yes. By preventing oil vapour from entering the intake and mixing with EGR gases, the ProVent reduces the causes of excessive smoke—especially the blue/grey smoke that can develop as engines age.
Q: Is this built for Australian conditions?
A: Yes! Direction-Plus™ engineering means this kit is specifically designed for Australian conditions—extreme heat, dust, and the serious work that D-MAX and MU-X vehicles are used for. Built for the way Aussies actually use their Isuzus—whether for work, towing, or family duties in harsh conditions.
Q: Does this fit both D-MAX ute and MU-X SUV?
A: Yes! Both vehicles share the same 4JJ1 engine and crankcase ventilation system. One catch can kit fits both the D-MAX ute and MU-X SUV with 4JJ1-TC or 4JJ1-TCX engines.
Q: How much oil typically collects?
A: The 4JJ1 typically collects moderate amounts—perhaps 100-200ml between services depending on driving conditions and engine condition. Higher mileage engines or those used for towing may collect more. This is actually a good sign—it shows how much oil vapour the ProVent is keeping out of your intake system.
Protect Your D-MAX or MU-X 4JJ1 Engine
Keep your 4JJ1 running clean and strong — essential protection
Prevents carbon sludge, protects turbo, saves thousands on repairs
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