Tachometer noise

cossie1600 · 03-22-2013, 06:57 PM

Hey guys,

My tachometer makes a noise when it does the sweep to start the car. The noise sounds like plastic gearing spinning. It only does it when you start the car when it goes from 0 to 7500RPM and back. It would also make that noise when I do it with the car in the on position but engine off. Once the car is running, no noise at all. Is that normal? My warranty is running out next weekend, I just want to get a few small issues taken care of.

Thanks

Trips · 03-22-2013, 07:02 PM

Take it in so it's not on your dime.

DIGItonium · 03-23-2013, 01:15 PM

There are, indeed, plastic gears in the tach with very thin gear fluid. It is pretty simple in construction. There was a time when the tach shaft slipped out of one of the gears, and I was able to push it back in and reassemble. Alignment was done with the needle in place and pushing it counter-clockwise to slip it in the home position.

Of course, this is not possible with all cars like the Honda Prelude I worked on. Once the shaft slipped out, it was broke.

cossie1600 · 03-23-2013, 05:26 PM

The thing is that it only makes the noise doing the initial sweep to the top or putting the car in on position, not when car is working. I don't remember if the car had that noise when new

Shwimpy · 11-22-2020, 05:54 PM

Did you figure out the issue? Experiencing the exact same problem on a 2010 Z with <25k miles. Thanks and sorry I do realize this was 7 years ago.

03-22-2013, 06:57 PM	#1 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	Tachometer noise Hey guys, My tachometer makes a noise when it does the sweep to start the car. The noise sounds like plastic gearing spinning. It only does it when you start the car when it goes from 0 to 7500RPM and back. It would also make that noise when I do it with the car in the on position but engine off. Once the car is running, no noise at all. Is that normal? My warranty is running out next weekend, I just want to get a few small issues taken care of. Thanks

03-22-2013, 07:02 PM	#2 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,730 Drives: 🔰 Rep Power: 10	Take it in so it's not on your dime. __________________

03-23-2013, 01:15 PM	#3 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	There are, indeed, plastic gears in the tach with very thin gear fluid. It is pretty simple in construction. There was a time when the tach shaft slipped out of one of the gears, and I was able to push it back in and reassemble. Alignment was done with the needle in place and pushing it counter-clockwise to slip it in the home position. Of course, this is not possible with all cars like the Honda Prelude I worked on. Once the shaft slipped out, it was broke. __________________

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03-23-2013, 05:26 PM	#4 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	The thing is that it only makes the noise doing the initial sweep to the top or putting the car in on position, not when car is working. I don't remember if the car had that noise when new

11-22-2020, 05:54 PM	#5 (permalink)
Shwimpy Base Member Join Date: Nov 2010 Location: L.A. Posts: 10 Drives: TT Z32 / 40th Z34 Rep Power: 3370	Did you figure out the issue? Experiencing the exact same problem on a 2010 Z with <25k miles. Thanks and sorry I do realize this was 7 years ago.