Unusual Master Cylinder question... - The Unofficial BMW M5 Messageboard (m5board.com)

Mtechnik540i · 30th December 2006, 06:20

Well, it goes like this...

The engine is out, and we're busy blocking off all holes, hoses, etc. as we're about to clean up the engine bay and wanted to avoid spraying water into certain areas. Well, I'm just 'a-plugging' until I get to the Master cylinder where I pop a plug in..."Whoops" Yup, the plug was too small and it continued into the Master Cylinder, where it's now stuck.

If you look at this diagram, it's the hole in the MC that the #11 hose goes into....

You guys have any recommendations?

Regards,

kalevera · 31st December 2006, 04:49

Trevor, I am confused -- #11 is the vacuum line that supplies the brake booster, which is sealed and can't even really be serviced. #10 is a check valve that prevents the car from losing service brake power assist when the engine stalls. So, if the plug is in the brake booster, best bet is to fish it out or replace the unit.

Mtechnik540i · 31st December 2006, 05:11

Quote:

Originally Posted by kalevera

Trevor, I am confused -- #11 is the vacuum line that supplies the brake booster, which is sealed and can't even really be serviced. #10 is a check valve that prevents the car from losing service brake power assist when the engine stalls. So, if the plug is in the brake booster, best bet is to fish it out or replace the unit.

It's just the hole that #11 hose and #10 valve go into on the booster.

Trying to get out of replacing the whole thing, have tried fishing it out a little bit. It had to be plastic, couldn't have been some conductable material!

Anyway, just wondering if any folks might have any suggestions. Kind of stuck.

Mtechnik540i · 29th January 2007, 07:21

Bump.