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Peter Fenwick 
Bavarian-Board Contributor
Joined: 27-August-2003
Location: Lost somewhere in time...
Status: Offline
Points: 6484
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 Posted: 11-August-2005 at 12:25 |
My thermostat failed open and I thought it was quite common for this to happen on BMWs.
I should have taken a picture before I binned it.
Edited by Peter Fenwick
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Entering an age of Austerity and now driving a Focus Diesel.
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jonathanlewis19
Newbie
Joined: 27-March-2003
Location: United Kingdom
Status: Offline
Points: 32
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Posted: 12-August-2005 at 07:09 |
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Well I got it back from the 'repair' shop, and it now seems to cool properly, so it seems that it was the thermostat which was the problem....
He acknowledged that it would make sense to put one in again, but that he wanted to make sure that the 'head settles down'... Given that the car was stopped as soon as the red light came on, I'm hoping that there wasn't any head damage, but I guess that time will tell... Or is it more obvious than that?
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LuxAuto
Senior Member II
Joined: 10-April-2005
Status: Offline
Points: 225
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Posted: 12-August-2005 at 10:19 |
he's talking pure crap.
why would a head require settling down?
if it has been distorted by the heat, it will be distorted. Running it without a thermostat is not going to un-distort it.
A leaking head gasket is usually the first things to indicate a distorted head, but they are pretty tough so you shouldn;t have caused any damage if you turned the engine off straight away, unless of course you are running a straight six, in which case, it is probably easier to distort due to the length of the head.
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sleeper
Really Senior Member II
Original and STILL best
Joined: 26-March-2004
Location: East Sussex/Kent border
Status: Offline
Points: 2098
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Posted: 12-August-2005 at 11:56 |
 LuxAuto wrote:
he's talking pure crap.
why would a head require settling down?
if it has been distorted by the heat, it will be distorted. Running it without a thermostat is not going to un-distort it.
A leaking head gasket is usually the first things to indicate a distorted head, but they are pretty tough so you shouldn;t have caused any damage if you turned the engine off straight away, unless of course you are running a straight six, in which case, it is probably easier to distort due to the length of the head.
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agreed. Lol! what the hell else would a 328 be?!?
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LuxAuto
Senior Member II
Joined: 10-April-2005
Status: Offline
Points: 225
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Posted: 12-August-2005 at 13:29 |
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Don't know! Wasnt paying attention to the model he was driving!
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jonathanlewis19
Newbie
Joined: 27-March-2003
Location: United Kingdom
Status: Offline
Points: 32
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Posted: 15-August-2005 at 13:09 |
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yep - 328 so straight six...
got a bit worried when I saw it start to overheat again, but looked under the bonnet and saw coolant spewing out of the plug between the rad and the expansion tank... one way or another, then plug had started to shear, allowing coolant to bubble through the 'x' where you put your screwdriver...
still trying to find a replacement... hoping that my nightmare is soon over...
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sleeper
Really Senior Member II
Original and STILL best
Joined: 26-March-2004
Location: East Sussex/Kent border
Status: Offline
Points: 2098
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Posted: 15-August-2005 at 14:19 |
I think they are about 28p from the dealers... no excuse!!
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kazzoo
Newbie
Joined: 20-July-2005
Location: london,england
Status: Offline
Points: 38
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Posted: 15-August-2005 at 14:28 |
A thermostat has 2 modes of action,one is to open up at the correct temperture to allow the coolant to be cooled, and 2 it restricts the amount of flow around the engine,ie if it is pumped to fast it would not have enough time to cool off so not fitting one is just as bad and will eventually get to hot.The flow has to be exactly right to stay at the correct temp.Also a lot of vehicles have a duel stage thermostat which allows one port to be shut while another opens at different tempertures so leaving one of these out is suicide.I can,t understand why when it was apart they never put one in,does,nt make sense,they have to take apart again to fit it.
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E36 328 overheating