Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
User Name
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management

LinkBack Thread Tools Display Modes
Old 11-11-2023, 08:26 PM
Join Date: Dec 2017
Location: Discovery Bay, CA
Posts: 85
tempest411 is on a distinguished road
Just an update in case anyone happens to encounter this issue in the future. I haven't solved the problem yet, but thought I'd share what's happened so far. I installed a new auxiliary water pump and hoses and am able to observe what happens when you purge the system according to the factory procedure. I don't know why, but there is in fact a lot of air trapped that was pushed out by the little pump. You can observe a steady stream at the expansion tank with the cap removed. Because the only bleeder screw is at the expansion tank it suggests (to me) that it's the only high point in the system. I actually always wondered why the bleeder screw was there at all because you could always break the cap loose. Normally on cars with multiple volumes that trap air they provide multiple bleed points, or plumb small hoses as steam vents where applicable. Anyhow, I didn't get too far after refilling it and installing the fan clutch as I discovered a leak. One of the hoses I replaced, pt# 11537505949, the one that goes from the auxiliary water pump to the back of the engine, has a manufacturing defect. The ribbed piece that's brazed on to the metal section that in turn has a hose permanently banded to it leaks. I took the hose apart to figure this out. I've had this hose kicking around my garage since 2019, so I couldn't return it even if I remembered who I got it from. I would even scavenge the metal section from my old hose assembly except it was in the trash when it was picked up yesterday. Maybe I could silver solder it? I put in an order for a new one. Delivery time was important, so I placed the order with Pelican even though they were the most expensive at $166.00. Lastly, I did run the engine for a brief time today, and suspect bleeding it out more thoroughly, the new (Behr) fan clutch, and a new factory sending unit has not left it running any cooler. the temperature surged to 235F, with a 190F (Bremmen) thermostat after operating for maybe ten minutes. At this point I suspect the thermostat is defective. I really have egg on my face at this point considering I started out with a vehicle that ran fine. My goal was to renew the radiator, some hoses, and install a cooler thermostat. Since then nothing seems to be going right. I've never touched a vehicle that was so much trouble!
2003 BMW E53 X5 4.4
Reply With Quote

Sponsored Links



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 12:50 PM.
vBulletin, Copyright 2023, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.