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Old 11-24-2012, 10:46 PM   #1
v62go
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couple questions about a factory tach and oil preasure gauges

my factory tach gets stuck at around 2500rpms mark and i have to pop the top of the dash to get it un-stuck(how do i fix that?)...and how can you tell the difference between a 60lb and 80lb oil preasure gauge?
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Old 11-24-2012, 11:03 PM   #2
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Re: couple questions about a factory tach and oil preasure gauges

Not sure about the tach, but the 60 pound gauge says 60 lbs and the 80 pound gauge says 80 lbs. Both are marked at the bottom and can't be seen until removed from the cluster.
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Old 11-24-2012, 11:03 PM   #3
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Re: couple questions about a factory tach and oil preasure gauges

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my factory tach gets stuck at around 2500rpms mark and i have to pop the top of the dash to get it un-stuck(how do i fix that?)...and how can you tell the difference between a 60lb and 80lb oil preasure gauge?
Not sure about the tach, but the 80 lb oild pressure gauges are marked on the face down low where you have to pull the cluster apart to see it
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Old 11-24-2012, 11:05 PM   #4
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Re: couple questions about a factory tach and oil preasure gauges

can i just pull the bezel off the front?
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Old 11-24-2012, 11:06 PM   #5
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Re: couple questions about a factory tach and oil preasure gauges

It's easier to just pull the gauge out from the back. Only has 2-3 small sheet metal bolts holding it in.
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Old 11-24-2012, 11:16 PM   #6
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Re: couple questions about a factory tach and oil preasure gauges

80lb oil pressure gauges only came in C/40 and larger trucks. Unless one was swapped in, or your gauge cluster is from one of those trucks it is going to be a 60 lb gauge
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Old 11-24-2012, 11:55 PM   #7
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Re: couple questions about a factory tach and oil preasure gauges

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80lb oil pressure gauges only came in C/40 and larger trucks. Unless one was swapped in, or your gauge cluster is from one of those trucks it is going to be a 60 lb gauge
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I've also seen them in the 67 GMC V6 engines.
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Old 11-24-2012, 11:19 PM   #8
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Re: couple questions about a factory tach and oil preasure gauges

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Old 11-25-2012, 12:48 AM   #9
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Re: couple questions about a factory tach and oil preasure gauges

thank guys..anybody have some ideals about the tach problem?
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Old 11-25-2012, 03:25 AM   #10
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Wink Re: couple questions about a factory tach and oil preasure gauges

Is the tach factory wired? If so I would start at the back of the dash where the wires connect and clean and reinstall plug then do the same on the other end.
If that doesn't fix it then it's more than likely a internal problem.
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Old 11-25-2012, 09:38 AM   #11
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Re: couple questions about a factory tach and oil preasure gauges

Needle could be bent, and making contact with gauge face
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