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View Full Version : Brake Expansion Tank (fluid resviour) leaking



BigKriss
04-23-2007, 05:24 AM
The rear plug is all wet with fluid, and it's dripping down onto the brake booster. The front one seems better.

Part number 2: 34311160133 - The plugs
http://realoem.com/bmw/showparts.do?model=HD22&mospid=47382&btnr=34_0217&hg=34&fg=25&hl=7

Anyone done this before and is there anything I should take note of when removing and installing it again?

Any more advice on changing the plugs?

winfred
04-23-2007, 08:17 AM
pull the tank off pop the #2s out and pop in the new ones, smear a little fluid on them before pushing the tank back in, use the bmw spec fluid, not sure if you have the same standards down there, dot 4 is the recomended fluid here, dot 3 is the most common avalable and it usually eats those grommits, i am figuring it's the alcohol that does it. they generally don't need bleeding

BigKriss
04-23-2007, 08:44 AM
Wow, thanks for the quick reply Winfred. I'm using Lucas Grand Prix 600 brake fluid. (http://dairally.net/shop/index.php?main_page=product_info&cPath=2_17&products_id=77) I'm assuming it's okay for the e34.

genphreak
04-23-2007, 08:49 AM
Wow, thanks for the quick reply Winfred. I'm using Lucas Grand Prix 600 brake fluid. (http://dairally.net/shop/index.php?main_page=product_info&cPath=2_17&products_id=77) I'm assuming it's okay for the e34.You need Super Dot 4 spec fluid, Kris... Castrol do it. There's aguy that sells it cheap in bulk on ebay.com.au

Ross
04-23-2007, 08:50 AM
LUCAS brake fluid? Ha, ha ha As in the inventor of intermittant wipers? lights etc.
Frightening concept.

BigKriss
04-23-2007, 08:57 AM
I think I used that last time (http://www.castrol.com/liveassets/bp_internet/castrol/castrol_italy/STAGING/local_assets/downloads/t/TDS_RESSDOT4.PDF), but the lucas stuff has slightly higher boiling points. The Castrol stuff is a lot cheaper though.



You need Super Dot 4 spec fluid, Kris... Castrol do it. There's aguy that sells it cheap in bulk on ebay.com.au

winfred
04-23-2007, 12:00 PM
castroil gt-lma is dot 4 and good stuff, pretty much if it's good for a old british car it should be ok from a eating the rubber stand point, the natural rubber gets turned to jello by the crap dot 3 fluid

632 Regal
04-23-2007, 02:14 PM
backward compatible with Dot 5.1 and 4

You need Super Dot 4 spec fluid, Kris... Castrol do it. There's aguy that sells it cheap in bulk on ebay.com.au