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Author Topic: Project TB2 - Update 3  (Read 3286 times)

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TheBoy

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Re: Project TB2 - Update 3
« Reply #15 on: 06 April 2007, 22:21:07 »
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HOhO Got exactly the same faults on the other estate!!! except it doesent blow the water out, just gets hotter and hotter goes up to 98 or so then i chickened out! bridges the leccly fans didnt seem to help, found out the first speed onn the fans comes in at 95, second speed full power isnst designed to come on till about the 100? cant be right surely? anyway started to look outside the box so to sspeak and lo and behold think i have found it but!! wont know till tomorrow when i fit the needed part and try it!! however if its the same fault on yours mate its a bastard to find!!!
Omegatoy
Will I need 'Tunnie' to crawl around inside my engine bay? Esp as the bastard dealer let us down on those gaskets (kept on back order, as going to be needing in future anyway)  >:(
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Omegatoy

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Re: Project TB2 - Update 3
« Reply #16 on: 06 April 2007, 22:40:51 »
nope!!! its on the front of the engine and apparently is a well known fault on the Bmw td!!! have to say i hadnt come across it before but it makes sense!!!
and when i finally got it apart it was exactly as described!!!
dont get your hopes up tho it may not fix it!!! but i hope it does!!!
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Kevin Wood

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Re: Project TB2 - Update 3
« Reply #17 on: 07 April 2007, 00:50:27 »
Regarding fan temperatures the coolant in an engine has a higher boiling point than normal due to the pressure it is under and the antifreeze, which raises the boiling point. It's not unusual for fan switches to be over boiling point. Generally the system needs to reach 110-120 deg c before it'll boil over IME.

Also, thinking about coolant temperature sensors I'm not sure what tractors do during warm up. They don't have throttles, and ingest air at the maximum rate under all load conditions, so the mixture is inherently variable. Put more fuel in and it just runs faster. The coolant temperature sensor probably just controls the duration of the glow plug warm-up, unless the air intake has a choke valve to allow it to enrich the mixture?

Kevin
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Elite Pete

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Re: Project TB2 - Update 3
« Reply #18 on: 07 April 2007, 01:44:19 »
Is it a viscous fan on the tractor and if so is it working?
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TheBoy

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Re: Project TB2 - Update 3
« Reply #19 on: 07 April 2007, 10:21:02 »
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Is it a viscous fan on the tractor and if so is it working?
Yes, viscous fan, and certainly appears to howl a bit (that distinctive viscous noise) when pulling away.  Whether its still howls when hot is not yet determined....


Omegatoy has come up with a theory, which all seems to fit in with the symptoms, including some of the hassles AA and I had when we changed the waterpump.  Hopefully, soon, we will be able to test this theory, but I am quietly confident ;)
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