Coolant rising without being topped up!
Printed From: Bavarian-Board.co.uk - BMW Owners Discussion Forum
Category: Technical & Model Specific Forums
Forum Name: BMW 5 Series
Forum Discription: This forum will deal with any issues on the BMW 5 Series (E12, E28, E34, E39, E60 & E61)
URL: http://www.bavarian-board.co.uk/forum_posts.asp?TID=31784
Printed Date: 03-May-2024 at 23:23
Topic: Coolant rising without being topped up!
Posted By: bm24v
Subject: Coolant rising without being topped up!
Date Posted: 08-July-2006 at 10:29
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On a 98' 5 ser........on a cold engine.. Went out yesterday to check after having it pressure tested (and it was fine), the coolant was about an inch from the bottom of the bottle, I took the cap off and loosened the bleed screw (the one next the cap on the exp bottle) so as to let any air out while topping up (so breakdown said).. What happen's..... The coolant level rises up the "cold" level.....is this normal...if not What's happened? |
Replies:
Posted By: vpricey
Date Posted: 08-July-2006 at 20:49
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Was this before u put any water in?? ------------- Paul - '87 E30 325i Sport - '99 E39 M5 - '05 E53 X5 
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Posted By: 540 V8
Date Posted: 08-July-2006 at 22:00
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Just a theory, but it may be where the system is under pressure and you letting the air out dislodges any air bubbles in various places and the coolant then finds it's own level again? Regards Mike ------------- 
Current:E34 540i Touring 6 speed manual(Mpower bodykit & suspension)& Chrysler Voyager 3.3 V6 auto Previous:E34 530iSE AC Schnitzer suspension. E28 525e auto-Standard |
Posted By: ally
Date Posted: 08-July-2006 at 22:02
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Yeh, sounds like there was an airlock somewhere? ------------- E39 530i Sport Aegean Blue Edition Saab 9-5T SE Estate E36 318i loon...sold E36 323i coupe...sold |
Posted By: flyingalexf68
Date Posted: 08-July-2006 at 22:36
Could be an airlock. I had one in my jeep. Had a good luck and realized my head gasket is gone.  You should check yours if it keeps happening.------------- 1995 e36 3.0 M3 Coupe, Daytona Violet, AP Racing BBK, CCFL Angel Eyes, M3 Spoiler, M-Tec 3 Steering Wheel. 2000 530d Steptronic, Poverty Spec, 18" Alloys. |
Posted By: bm24v
Date Posted: 09-July-2006 at 00:12
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Vpricey......yea before anything goes in! What I did find out tonight while out.......when starting a journey within about 1-2 the temp gauge goes near the red....I stop and let air out from the nipple nearest the stat (as it's the highest point) then drive for a further 8 or so mile's with no prob's at all. It did this twice...after stopping twice..
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