The car (e85 3.0 ) spits coolant through the radiator cap when the engine is hot and only while driving the car ( doesn’t when I let the car sit and get up to temp )
I replaced the thermostat and still the same thing is happening again, also it doesn’t show any sign of a bad or blown head gasket.
Anyone had this happen or know what causes this to happen ?
All help appreciated
Thanks in advance
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Coolant spit
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Smartbear
- Lifer
- Posts: 13685
- Joined: Wed Feb 05, 2014 6:54 pm
- Location: a barn in Somerset
Coolant spit
Try a new cap 
Rob
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
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Machine monkey
- Lifer
- Posts: 11310
- Joined: Thu Oct 04, 2012 12:49 pm
- Location: In the shire Oxfordshire
Coolant spit
I have a rad almost new tank and new hoses for sale. But as said just try a new cap first
My little blue zed is in lots of bits. With lots of things started and not many finished! I may have found the limits of my time and ability!!
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Tkghali
- Newbie
- Posts: 10
- Joined: Mon Feb 04, 2019 11:21 pm
Coolant spit
Sorry forgot to mention I tried new cap first since it was the easiest option
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kis
- Lifer
- Posts: 4546
- Joined: Wed Jul 20, 2016 2:33 pm
- Location: Surrey / West Sussex Boarder
Coolant spit
Could be a split (crack) in the expansion tank near the cap? So looks like it’s the cap... but could be the threaded section?
My E85 Z4 3.0i SMG
BMW Family History (past and present):
1 Series - E87
3 Series - E46 Coupe, E46 M3, E90 (x3)
4 Series - F36, F82 M4
5 Series - E34 (x2), E39
7 Series - E32
X5 - E53, E70
X6 - E71
BMW Family History (past and present):
1 Series - E87
3 Series - E46 Coupe, E46 M3, E90 (x3)
4 Series - F36, F82 M4
5 Series - E34 (x2), E39
7 Series - E32
X5 - E53, E70
X6 - E71