if it makes noise it has a leak.... check the engine mounts first and if you have a manual gearbox check the egr bypass valve they almost all go bad you can blind the hose off .
The bypass valve alternates during warmup the gasses in the egr cooler or not warmup the cat faster but if it switched off all the gasses passes in the egr cooler which warms up the coolant faster.
The auto gearbox doesent even have one .
If that all is ok check the brakebooster on leaks
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