Coolant rising without being topped up!

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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?

Edited by bm24v

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bm24v Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 03-August-2004 Location: Glasgow Status: Offline Points: 565	Topic: Coolant rising without being topped up! Posted: 08-July-2006 at 10:29
	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? Edited by bm24v

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vpricey Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 07-February-2006 Location: Edinburgh Status: Offline Points: 2252	Posted: 08-July-2006 at 20:49
	Was this before u put any water in??
	Paul - '87 E30 325i Sport - '99 E39 M5 - '05 E53 X5

540 V8 Members Profile Send Private Message Find Members Posts Add to Buddy List Bavarian-Board Contributor Lick my badge Joined: 07-December-2005 Location: Running the asylum Status: Offline Points: 2280	Posted: 08-July-2006 at 22:00
	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

ally Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 11-October-2004 Status: Offline Points: 1529	Posted: 08-July-2006 at 22:02
	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

flyingalexf68 Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 01-April-2006 Location: 53�19�59,6�14�56 Status: Offline Points: 2581	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.

bm24v Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 03-August-2004 Location: Glasgow Status: Offline Points: 565	Posted: 09-July-2006 at 00:12
	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..