Awesome job to come through the workshop, had a customer call, there vehicle having gone into limp mode. Booked in and towed to the workshop, Scan check returned a p0234 map sensor correlation DTC. Upon diagnosis we found a failure of bank 2 intake manifold and throttle body housing causing a boost leak. Customer was happy to proceed with the replacement of both manifolds and the throttle body, upgrading to an alloy intake rather than the factory plastic ones. We proceeded with adding a camber kit and water pump as was due by kms for its second replacement, happily this customer was not concerned about the price more so that the job was done properly. First time for our workshop with this fault but uncle google came in handy to show how common it was and lead to finding improved parts to ensure a better outcome for the customer. Never be afraid to call around and do a little research during the repair to find information that’s outside local knowledge 👍🏼👍🏼

1. What “oil grade” means Engine oil grade tells you how thick or thin the oil is and how it behaves in different temperatures. Example:5W-30 - 5W = winter (cold start flow) - 30 = thickness when engine is hot So the oil has to: - Flow easily on cold start - Stay strong and protective when hot 2. Petrol engine oil (spark ignition engines) Petrol engines: - Run cleaner - Produce less soot - Usually run at higher RPM Typical oil characteristics: - Lower soot handling required - Less detergent needed - Often lighter oil grades Common grades: - 0W-20 - 5W-30 - 5W-40 Key idea: Petrol oils focus on fuel economy and smooth flow 3. Diesel engine oil (compression ignition engines) Diesel engines: - Produce more soot and carbon - Higher compression = more stress - Often run longer and heavier loads Oil must handle: - More soot contamination 🖤 - Higher pressure - More heat stress Common grades: - 5W-30 (diesel spec) - 5W-40 - 10W-40 (older engines) Key idea: Diesel oils are stronger and more detergent-heavy

🚨 Real Diagnosis Case Study – Mitsubishi 4D56 Engine Knock Customer complaint: Engine knock at idle that almost disappeared when the revs were brought up. At first inspection, we suspected possible lower-end engine damage. To confirm, we cut open the oil filter and found metallic contamination throughout the filter media — a strong sign of internal engine failure. After clear communication with the customer and discussing the likely repair costs and next steps, approval was given to remove the engine for further inspection. Once the sump was removed, the fault was confirmed: the crankshaft had completely cracked behind cylinder 1. At idle, the broken crank was allowing movement and creating the knock. As revs increased, the two sections would momentarily lock together, reducing the noise and allowing all cylinders to operate more smoothly. 💡 This is why correct diagnosis matters. Guesswork can cost thousands. Proper testing, customer care, and communication are just as important as turning spanners. Have you ever heard an engine knock that disappeared with revs? #Mitsubishi #4D56 #EngineFailure #MechanicLife #Diagnostics #DieselEngine #WorkshopRealities

First look at what happens when servicing gets ignored. This Mitsubishi Triton fitted with the 4D56 2.5L diesel came in over 40,000kms overdue for its service. The result? Severe oil sludge build-up throughout the rocker cover and valvetrain. That thick black sludge restricts oil flow, increases wear, causes poor lubrication, and can eventually lead to expensive engine damage or turbo failure. These engines are designed to run on the correct genuine-spec oil, formulated to handle soot contamination, heat, and the demands of a diesel engine. Using the right oil and changing it on schedule is critical. Regular servicing matters on any engine—but even more on modern diesel engines with tighter tolerances, turbos, EGR systems, and higher operating temperatures. Miss services, and problems stack up fast. 💡 Prevention is always cheaper than repair. When was your last service?#Mitsubishi #Triton #4D56 #DieselEngine #MechanicLife #CarMaintenance #ServicingMatters