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1

sounds like something to do with the brake hydraulics. possibly brake booster? Need to state more information like HOW & WHEN things happen... What CAR? etc. ... The noise is very odd, but MIGHT be attributable to sticking brake components that suddenly come loose. Possible that some other kind of electronic control on your brakes is acting up as well, ...


2

Although, your point about cold engine mounts applies, I would doubt they heat up enough to significantly affect vibration transfer to the interior. Instead, what you might look at is increasing your idle speed a bit if that's easily doable. Every engine has a range of natural resonance, the range where the engine simply vibrates more than in other ranges. ...


5

Your procedure for bleeding is fine, except for the banjo bolt You can bleed a line at the banjo bolt but you can't bleed a caliper. You can get your stuck nipple off if you break the head by using a bolt extractor. If you use a bolt extractor and have to drill it out in any way you will NEED to disassemble the caliper to ensure it does not have any metal ...


6

No, you can still have air trapped in the rear caliper/wheel cylinder. Removing the line could introduce air to the caliper or wheel cylinder. Unfortunately, this means you might end up replacing your rear calipers / wheel cylinders also. It has happened to me a number of times. Be sure to spray it with some good penetrating oil and use a 6 point socket. ...



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