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Author Topic: Overheating  (Read 1634 times)

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Highlander

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Overheating
« on: 14 July 2007, 20:00:45 »
Help please!!
Car has started overheating ie. the temp goes off the scale and the car looses all power. Stop for a couple of minutes and the temp drops to about 95 drive off and have power back  temp then goes up again and power drops. This happened after only driving about 3-4 miles. Thought it might have been a sticky stat but can't find it, any ideas where it should be in the 2.5TD BMW engine? Thanks in advance for any sugestions.
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TheBoy

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Re: Overheating
« Reply #1 on: 14 July 2007, 20:37:53 »
Quote
Help please!!
Car has started overheating ie. the temp goes off the scale and the car looses all power. Stop for a couple of minutes and the temp drops to about 95 drive off and have power back  temp then goes up again and power drops. This happened after only driving about 3-4 miles. Thought it might have been a sticky stat but can't find it, any ideas where it should be in the 2.5TD BMW engine? Thanks in advance for any sugestions.
Do NOT drive the car if its overheating! The engine is safe to 110C (which is actually 100C on the gauge!!).

I have had no end of cooling issue with my TD, I know every single bloody cooling item on the overated BMW PoS  >:(

The stat is on the front of engine - easy to get at. Remove viscous and shroud. Follow the bottom rad hose up, and remove it at the higher end elbow. Remove the plastic elbow (3 10mm bolts - make sure you get right 3, its easy to undo the wrong bolt underneath), stat behind it.

If you need any more info, post up. As I say, I have unfortunatley become very familiar with the cooling system.
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Highlander

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Re: Overheating
« Reply #2 on: 14 July 2007, 20:41:54 »
Thanks TB I assume it will be ok to drive after removing the stat to check that it is not overheating again untill I can get a replacement one.
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TheBoy

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Re: Overheating
« Reply #3 on: 14 July 2007, 20:47:43 »
Quote
Thanks TB I assume it will be ok to drive after removing the stat to check that it is not overheating again untill I can get a replacement one.
you won't get a watertight seal without stat, so remove, and test in boiling water.
you cannot run with no stat (you'll lose all coolant in minutes....
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Highlander

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Re: Overheating
« Reply #4 on: 15 July 2007, 11:22:20 »
TB Sorry to read about the problems you are having with your own TD.
I can now see where the stat is but can't see how to remove the viscous fan or do I need to remove the rad before this is possible.
Thanks again for your help
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Dave-C

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Re: Overheating
« Reply #5 on: 15 July 2007, 11:26:40 »
Quote
Quote
Help please!!
Car has started overheating ie. the temp goes off the scale and the car looses all power. Stop for a couple of minutes and the temp drops to about 95 drive off and have power back  temp then goes up again and power drops. This happened after only driving about 3-4 miles. Thought it might have been a sticky stat but can't find it, any ideas where it should be in the 2.5TD BMW engine? Thanks in advance for any sugestions.
Do NOT drive the car if its overheating! The engine is safe to 110C (which is actually 100C on the gauge!!).

I have had no end of cooling issue with my TD, I know every single bloody cooling item on the overated BMW PoS  >:(

The stat is on the front of engine - easy to get at. Remove viscous and shroud. Follow the bottom rad hose up, and remove it at the higher end elbow. Remove the plastic elbow (3 10mm bolts - make sure you get right 3, its easy to undo the wrong bolt underneath), stat behind it.

If you need any more info, post up. As I say, I have unfortunatley become very familiar with the cooling system.


Jaime, is yours sorted now???

Dave C
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TheBoy

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Re: Overheating
« Reply #6 on: 15 July 2007, 12:31:21 »
Quote
TB Sorry to read about the problems you are having with your own TD.
I can now see where the stat is but can't see how to remove the viscous fan or do I need to remove the rad before this is possible.
Thanks again for your help
You need to remove intake plastic bit (with Turbo Diesel on), unscrew viscous from waterpump (32mm, left hand thread, and a bugger if it hasn't been off for a while), then remove the plastic shroud around fan.

I've done it a few times, takes about 2 mins if it goes well, or hours if the fan is a bastard, and you are missing the water pump lock tool.
« Last Edit: 15 July 2007, 12:32:23 by TheBoy »
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TheBoy

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Re: Overheating
« Reply #7 on: 15 July 2007, 12:32:48 »
Quote
Quote
Quote
Help please!!
Car has started overheating ie. the temp goes off the scale and the car looses all power. Stop for a couple of minutes and the temp drops to about 95 drive off and have power back  temp then goes up again and power drops. This happened after only driving about 3-4 miles. Thought it might have been a sticky stat but can't find it, any ideas where it should be in the 2.5TD BMW engine? Thanks in advance for any sugestions.
Do NOT drive the car if its overheating! The engine is safe to 110C (which is actually 100C on the gauge!!).

I have had no end of cooling issue with my TD, I know every single bloody cooling item on the overated BMW PoS  >:(

The stat is on the front of engine - easy to get at. Remove viscous and shroud. Follow the bottom rad hose up, and remove it at the higher end elbow. Remove the plastic elbow (3 10mm bolts - make sure you get right 3, its easy to undo the wrong bolt underneath), stat behind it.

If you need any more info, post up. As I say, I have unfortunatley become very familiar with the cooling system.


Jaime, is yours sorted now???

Dave C
Temp wise, yes. Coolant pressure wise, no.
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Highlander

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Re: Overheating
« Reply #8 on: 16 July 2007, 20:46:35 »
Quote
You need to remove intake plastic bit (with Turbo Diesel on), unscrew viscous from waterpump (32mm, left hand thread, and a bugger if it hasn't been off for a while), then remove the plastic shroud around fan.
 
I've done it a few times, takes about 2 mins if it goes well, or hours if the fan is a barsteward, and you are missing the water pump lock tool.

Fan came off OK but looks as if the stat is working it opens when placed in boiling water  :-/ will replace since I have come this far.
Any ideas what to look at next?
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TheBoy

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Re: Overheating
« Reply #9 on: 16 July 2007, 21:06:44 »
Knackered water pump (typical BMW junk, reknown for shedding impellors), blocked rad, silted block...
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Highlander

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Re: Overheating
« Reply #10 on: 19 July 2007, 22:06:00 »
Quote
Posted by: TheBoy Posted on: 16. Jul 2007 at 21:06
Knackered water pump (typical BMW junk, reknown for shedding impellors), blocked rad, silted block...  

Finaly got round to removing waterpump and it came out in many pieces  ;D so hopefully this will be the only problem.
Will try and get new one tomorrow as well as a new stat. Are there any better aftermarket pumps to be got or is it original
parts only? Thanks for all the help TheBoy you are TheMan!!  :y

Highlander
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Dave-C

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Re: Overheating
« Reply #11 on: 19 July 2007, 22:08:04 »
Quote
Quote
Posted by: TheBoy Posted on: 16. Jul 2007 at 21:06
Knackered water pump (typical BMW junk, reknown for shedding impellors), blocked rad, silted block...  

Finaly got round to removing waterpump and it came out in many pieces  ;D so hopefully this will be the only problem.
Will try and get new one tomorrow as well as a new stat. Are there any better aftermarket pumps to be got or is it original
parts only? Thanks for all the help TheBoy you are TheMan!!  :y

Highlander

That's great news :y Been watching this one...DC :)
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Highlander

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Re: Overheating
« Reply #12 on: 19 July 2007, 22:12:11 »
I ment to say as well that there are obviously some bits of the impellor missing I have removed all the parts that I can find so hopefully no other bits will make it back round and cause further problems!! :-/
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TheBoy

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Re: Overheating
« Reply #13 on: 19 July 2007, 22:13:42 »
Quote
Quote
Posted by: TheBoy Posted on: 16. Jul 2007 at 21:06
Knackered water pump (typical BMW junk, reknown for shedding impellors), blocked rad, silted block...  

Finaly got round to removing waterpump and it came out in many pieces  ;D so hopefully this will be the only problem.
Will try and get new one tomorrow as well as a new stat. Are there any better aftermarket pumps to be got or is it original
parts only? Thanks for all the help TheBoy you are TheMan!!  :y

Highlander
Try BMW dealers, Vx dealers, and motor factors....
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Grumpy old man
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