To bench bleed or not to bench bleed? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 06-05-2013, 10:49 AM   #1
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Default To bench bleed or not to bench bleed?

I bought a new brake master cylinder for my 79 Impala.
When I install it, I'll be using a Powerbleeder to bleed the system.

When using a Powerbleeder, do I still need to bench-bleed the master cylinder first before installing it on the car?

Thanks
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Old 06-05-2013, 12:13 PM   #2
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Does your car have ABS?
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Old 06-05-2013, 12:31 PM   #3
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Originally Posted by 2kg4u View Post
Does your car have ABS?




never used a power bleeder, but im pretty sure you always have to bench bleed the MC
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Old 06-05-2013, 12:42 PM   #4
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If his car has ABS and the complete system has air in it, he will need something to acvitate the ABS controller to bleed it.

Hence my question about ABS.
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Old 06-05-2013, 12:57 PM   #5
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look again closely at the year
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Old 06-05-2013, 01:00 PM   #6
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I guess this is the point where I point out it is a '79 Impala, as listed in the original post.

I would bench bleed it, better safe than sorry. With a lot of setups, the master cylinder mounts at a slight angle, and there is a high point usually with no way to get it out.
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Old 06-06-2013, 04:10 PM   #7
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Just to be safe, I bench bled it.

Thanks for the responses.
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