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4 wheel alignment question

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Old Nov 23, 2022 | 01:13 PM
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Default 4 wheel alignment question

I recently had an alignment done on my 2017 GS. They did not adjust the rear caster as they did not have the tool. I did notice after I got home that the left rear tire was @ 37 psi and the other 3 were @ 27. Will the differant tire pressures cause a mis-alignment?

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Old Nov 23, 2022 | 01:36 PM
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They won’t change the alignment specs on the sheet, but it will make the car handle a little weird. You should set them correctly.
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Old Nov 23, 2022 | 02:00 PM
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Was the tire pressure that way before you left for the alignment?
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Old Nov 23, 2022 | 07:09 PM
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When i do a wheel Alignment the first thing i do is set the Tire Pressure to the Factory setting sticker !!!




Last edited by wrecker3; Nov 23, 2022 at 07:14 PM.
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Old Nov 23, 2022 | 07:10 PM
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Originally Posted by Flattman
Was the tire pressure that way before you left for the alignment?
it was like that when he worked on it, it was equal before i took it in.
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Old Nov 23, 2022 | 07:14 PM
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Alignment is measured with the weight on the wheels / tires. With a 10 psi difference, that will affect the sidewall height of the tire and thus impart some error into the alignment measurements. And you always need to set rear caster when you do an alignment on a C7.
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Old Nov 23, 2022 | 07:20 PM
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Originally Posted by RacerRik
Alignment is measured with the weight on the wheels / tires. With a 10 psi difference, that will affect the sidewall height of the tire and thus impart some error into the alignment measurements. And you always need to set rear caster when you do an alignment on a C7.
Alignment Machines Cannot Measure or Display Rear Caster. That is why this Tool is needed.


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