볼트 하체 소음 관련 미국 포럼 글

인천V아르마 2018-07-06 15:20 조회 1420

I think I may have a real answer and a not so great solution. The tech at the dealer tightened the axel bolts to no avail. He started to do some digging in the GM tech systems and found that there was a technical service bulletin released two days ago (June 11th) for a creaking noise coming from the front end of a Bolt. Turns out that some of the anti sway bars installed at the factory were malformed. The tolerances between the anti sway bar and the engine subframe are so tight that the malformed sway bar can start to come into contact with the subframe as the suspension bushings break in. This causes a creaking sound in the front end of the car when the sway bar moves during suspension travel or turning. The telltale sign of this is that there will be wear mark in the center of the sway bar where it is rubbing against the subframe. Mine is rubbing so the assumption is that this is where the creaking sound is coming from.bolts to no avail. He started to do some digging in the GM tech systems and found that there was a technical service bulletin released two days ago (June 11th) for a creaking noise coming from the front end of a Bolt. Turns out that some of the anti sway bars installed at the factory were malformed. The tolerances between the anti sway bar and the engine subframe are so tight that the malformed sway bar can start to come into contact with the subframe as the suspension bushings break in. This causes a creaking sound in the front end of the car when the sway bar moves during suspension travel or turning. The telltale sign of this is that there will be wear mark in the center of the sway bar where it is rubbing against the subframe. Mine is rubbing so the assumption is that this is where the creaking sound is coming from.

The fix is a new anti sway bar. The problem is that the dealer could get no ETA for the part. AND to replace the anti sway bar, they have to drop the engine subframe and motor which is very unusual. In a normal vehicle, the front sway bar usually points forward toward the front of the car and it is easily removed by disconnecting several bushings and connect points. In a Bolt, it runs backwards towards the back of the car and is sandwiched between the motor and the engine subframe. There is no way to remove it without dropping the subframe and the motor. A very strange design decision by GM. Obviously, with a motor removal, it is going to be a multiday operation to change out the sway bar. I'm a little nervous about having the motor pulled out of the 4 month old Bolt to change out a sway bar. Luckily, the whole thing drops out of the bottom of the engine bay in one piece and most of the connections are electrical plugs that simply unplug from the motor (as opposed to an ICE car that has tons of vacuum hoses, fuel lines, exhaust, emissions stuff, etc.sway bar. The problem is that the dealer could get no ETA for the part. AND to replace the anti sway bar, they have to drop the engine subframe and motor which is very unusual. In a normal vehicle, the front sway bar usually points forward toward the front of the car and it is easily removed by disconnecting several bushings and connect points. In a Bolt, it runs backwards towards the back of the car and is sandwiched between the motor and the engine subframe. There is no way to remove it without dropping the subframe and the motor. A very strange design decision by GM. Obviously, with a motor removal, it is going to be a multiday operation to change out the sway bar. I'm a little nervous about having the motor pulled out of the 4 month old Bolt to change out a sway bar. Luckily, the whole thing drops out of the bottom of the engine bay in one piece and most of the connections are electrical plugs that simply unplug from the motor (as opposed to an ICE car that has tons of vacuum hoses, fuel lines, exhaust, emissions stuff, etc.

So the facts are: 1. The car is safe to drive and the problem itself is not major 2. conversely, the repair process is definitely a major undertaking and 3. there is no timeline for when the replacement part will arrive. major 2. conversely, the repair process is definitely a major undertaking and 3. there is no timeline for when the replacement part will arrive.