How to replace the inlet manifold and fit a ‪@tigworxwelding‬ oil cooler bypass on your Astra H VXR / OPC / SRI200 / Z20LEH / Z20LET

My brand new Nevlock oil cooler leaked on the way home from having it fitted, mixing oil and coolant, so I had to take the plunge to bypass the cooler since I already have an aftermarket front mounted oil cooler. Unfortunately this meant taking off the intake manifold, which was a daunting task, but turned out to be the easiest part!

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