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Z Series (Z3, Z4, Z8) General discussion and technical help for all year Z series cars.

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Unread 07-31-2012, 11:12 AM   #1
Keith T

Name: Keith T
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Your Ride: 1999 BMW Z3 !.9 Twin Cam
Unhappy Overheating Z3

Hello Everyone,
I have got a 1999 Z3 1.9 and it has suddenly decided to start overheating. The heater blows out cold when the engine is hot. Does anyone know how to bleed the air out of the system ?
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Unread 08-01-2012, 01:43 AM   #2
DEATH2000's Avatar

Name: DEATH2000
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Join Date: May 2005
Location: Calgary, Alberta
Rate My Car: 111 / 340
Your Ride: 1998 E36 328i sedan
Welcome to United Bimmer.

First, with the car running, crank the heat to full hot. This will help the thermostat to open and circulate coolant through the block. If possible lift the car a few inches. Air ailways travels to the highest point. The bleed screw is next to the expansion tank cap. Undo the bleed screw a bit and wait until you dont see any more bubbles.

Its the exact same procedure as the E36. Their are a few writeups on it if you Google "E36 coolant bleeding"


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E36 Bentley Manual PDF download avilable HERE
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