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Does it only make noise when in 4x4 mode or all the time?
This varies and you should check with the appropriate level of government depending on where you live. In North America, the social norm is 7:00 AM to 11:00 PM but the law may be different from this.
Aircraft make noise any time they fly. They make less noise at night because airports have published "noise abatement" procedures pilots follow to keep the people who live around airports happy.
no they don't
lol change your brake pads they make a grinding noise when its time to replace
If a radiator does not have enough time to warm up, it could end up making a squeaky noise. Also, a faulty radiator will make a squeaky noise.
New brake pads can squeal until the are broken in. Some cheaper pads make noise all of the time. If the pads continue to make noise there are chemicals that can be put on the pads to quiet the noise.
Going 49 mph in a residential area here in Maine will get you jail time. It'll be 30-day jail sentence and a $500 fine.
LA90 is a standard way of specifying background noise over a given time. It is the noise level that is exceeded for 90% of the time being considered. E.g. 25dBA LA90 (10min) means that for a given 15 min period noise levels would be above 25dBA for 90% of the time. It can also be used as a Noise Management Level for construction purposes where works are being conducted around residential areas. See the related link for more information.
most of the time when a u-joint starts going out it will make noise in rewind first
75 dB
Please ask this question again describing the noise (clunk/rattle/squeak/rub/rumble/groan/usw.) and type of vehicle (year/make/model/notcolor.)