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ACDelco 18M390997 Professional Master Cylinder Review

2

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Poor

Revainrating 2.5 out of 5  
Rating 
2.3
🛑 Brake System, 🏎️ Performance Car Parts & Accessories

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Description of ACDelco 18M390997 Professional Master Cylinder

Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality. Pressure tested to ensure safe and confident braking. Cast iron and aluminum specifications; no extra stress on the brake boosting mounting. Geometrical tolerance ensures that the body and plastic reservoir match for a proper fit. Piston assembly and return spring help to prevent brake drag, which can cause premature brake pad wear.

Reviews

Global ratings 2
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  • 4
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  • 3
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  • 2
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  • 1
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Type of review

Revainrating 3 out of 5

Expensive disappointment for brake system

Using this product, our team found that the quality did not match the price tag .The installation process was difficult and time-consuming and the brake performance did not improve as expected. While the build seemed sturdy, it did not withstand the demands of our automotive needs..

Pros
  • Sturdy build
Cons
  • Expensive, difficult installation, disappointing brake performance.

Revainrating 1 out of 5

Brakes will not lock up and release

Bought this master cylinder and fitted it as part of a brake job as I figured ACDelco parts were supposed to be good, after installing and bleeding the brakes I couldn't get around the block before the brakes locked and wouldn't release. After hours of trying to get it to work I took it off and put the old master cylinder back in and the brakes worked. I gave it one star because it's the least you can give it.

Pros
  • Master cylinder and parts
Cons
  • The list will be long.