Quote:
Originally Posted by deansbimmer
Quote:
Originally Posted by MaximusB
Do you need to cycle the abs pumps to complete the flush when you're changing from oem to bbk? Or just a regular bleed is sufficient?
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DSC actuation is the only way to do a complete flush/bleed but in all honesty most of the time this is omitted either by ignorance or by inability since you need software to do it (there is a service module in ISTA-D for the function). This is part of a proper yearly brake flush that BMW requires as part of the condition based service intervals.
In some cases you may not need to flush or bleed the DSC during a BBK installation. You're supposed to depress and secure the brake pedal fully during line-open repairs or replacements. This seals the master cylinder and keeps fluid from draining out while you replace components. If you completed the job this way then there should not have been any air introduced upstream and you should be fine with just a regular bleed. Even so, every time we bleed a DSC pump here at our shop, we see air bubbles. Plus, if you have air bubbles in your DSC pump you won't feel them until you get into the ABS and it pushes them through. Then you're left with a poor pedal until you bleed them out. |
Thank you for making it clear!