Hi guys,

Car has been going really well recently (almost passed her MOT on friday) - well, until Friday night that is. Left work and drove about a mile in slow traffic but by the time I reached the slip road to join the A14 I noticed that the temp was already up to 95 (only 6-7 mins after cold startup). I accelerated gently but the temp rocketed up to 100 deg so I backed off and cosasted a few hundred yards into the BP services - the temp was now 105 and there was no power so I just left it ticking over to cool down.

Whilst waiting for the RAC I tried to run through what might be wrong, the rad tank had filled up and was really pressurised (no real surprise), the engine didnt feel "hot" when I openend the bonnet and the fans weren't running to start with. I turned it off and resarted it whereby the fans did kick in and the temperature did seem to settle down at about 98 ( about 10 degrees higher than normal) - still no hot air from fans though.

So I am guessing at waterpump for 1st check as water didn't seem to be circulating round. If not, what are the signs of HBV failure?

If anyone has any other suggestions I will gladly take them on board as it shall be getting pulled to bits next week.

Thanks!  :y

Whip that water pump out first Chris!

If it's a gonna, I'd recommend replacing it with a Partco jobbie, as theirs have metal impellors on 'em.
:y

Seth wrote on 07. Nov 2010 at 19:25:

Whip that water pump out first Chris! If it's a gonna, I'd recommend replacing it with a Partco jobbie, as theirs have metal impellors on 'em. :y

I thought that would be the best place to look first - I'll have a look next week and let you know.

Thanks  :y

Seth wrote on 07. Nov 2010 at 19:25:

Whip that water pump out first Chris! If it's a gonna, I'd recommend replacing it with a Partco jobbie, as theirs have metal impellors on 'em. :y

Oooh, careful recommending partco on here!  ;)  :y

Bearing in mind your description of 6 minutes of driving from cold in slow traffic ...... two other causes (assuming your drive belt is ok) are:
1. Viscous fan coupling
2. Thermostat

Hope it simple & easy to fix ......

Evo wrote on 07. Nov 2010 at 20:30:

Bearing in mind your description of 6 minutes of driving from cold in slow traffic ...... two other causes (assuming your drive belt is ok) are: 1. Viscous fan coupling 2. Thermostat Hope it simple & easy to fix ......

Viscous does do diddly squat on that engine in reality.

Stat could be jammed shut, though normal mode of failure is stuck open on those.

Waterpump shedding its impellor on these (and other BMW engines) is common, and probably the first thing worth checking :y

Evo wrote on 07. Nov 2010 at 20:30:

Bearing in mind your description of 6 minutes of driving from cold in slow traffic ...... two other causes (assuming your drive belt is ok) are: 1. Viscous fan coupling 2. Thermostat Hope it simple & easy to fix ......

Viscous fan junked 2 years ago so unless it has risen from the dead to haunt me I don't think that's it!

New stat put in about 18 months ago so woul dbe suprised if that has failed.

Will whip pump out tonight hopefully and see what is going on.

Thanks for all the suggestions so far  :y

I had the same problem, it did it every now an then and it ended up being the fan belt tensioner that was flicking up and jamming so the belt wasn`t being turned. The trouble I had is everytime I turned the engine off it flicked back down and re tensioned the belt so it took me ages to actually see the problem.

smokingomega wrote on 08. Nov 2010 at 11:06:

I had the same problem, it did it every now an then and it ended up being the fan belt tensioner that was flicking up and jamming so the belt wasn`t being turned. The trouble I had is everytime I turned the engine off it flicked back down and re tensioned the belt so it took me ages to actually see the problem.

I have also had this, but the first sign that something was amiss was the lack of power steering.

Right, had the motor to bits and fished the pump out to find:

http://img.photobucket.com/albums/v241/chrispy_platt/200a198b.jpg

So as we thought the pump was at fault. Will get a new one delivered and go from there!

Thanks for all the help guys, hopefully won't be requiring your help again anytime soon  :-/ (fingers crossed)

Platty :D

Have a fish around in the aperture Chris, just to make sure that there's no other bits of the impeller in there.

Found some in one that I had in the 'shop - having it's second pump-change.
:y

What a cracking picture Platty.   :y 
Hopefully that can be kept on the forum under Common issues and Faqs or in Maintenance somewhere.

I thought the same as you Byron as there appears to be about 15% of the impellor unaccounted for - I have had a good look around the hole though:

http://img.photobucket.com/albums/v241/chrispy_platt/5ea5aa56.jpg

Another picture for the library:

http://img.photobucket.com/albums/v241/chrispy_platt/624ba62e.jpg

Maybe Jimbob can stitch these into the (very good) "maintenence guide"?

Thanks for the help again guys.

Interesting pictures .... but doesn't look as though the plastic impeller just got loose on the metal shaft .... more like a  forieign body jammed the impeller causing it to crack apart.

Evo wrote on 10. Nov 2010 at 09:32:

Interesting pictures .... but doesn't look as though the plastic impeller just got loose on the metal shaft .... more like a  forieign body jammed the impeller causing it to crack apart.

What will they get up to next.  ;D

Evo wrote on 10. Nov 2010 at 09:32:

Interesting pictures .... but doesn't look as though the plastic impeller just got loose on the metal shaft .... more like a  forieign body jammed the impeller causing it to crack apart.

I was undecided on this one as I thought the same as you initially, but on closer inspection it seems that the centre has worn through in places before finally coming loose. I am now facing the prospect of flushing the block under proessure to try and find these stray parts - joy  :(

::) I`ve seen kiddie`s toys made of better plastic than that! :o

New part arrived this morning, courtesy of Evans Motor Factors (http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=310229480134):

http://img.photobucket.com/albums/v241/chrispy_platt/79c3d941.jpg

Will get that dropped in tonight and see how we get on!

I'm glad I recently changed to a metal impeller now I've seen those pics. :y :y :y

Shackeng wrote on 11. Nov 2010 at 14:01:

I'm glad I recently changed to a metal impeller now I've seen those pics. :y :y :y

I had mine done about two years ago, as a precaution when the stat was done.
It was in perfect condition, no wear to the shaft and no cracks on the plastic impellor. Done approaching 117k.
I had it replaced anyway with with the very same type, proper BMW part.

Wonder if it's a certain type of anti-freeze that affects  them, makes them brittle.

http://i393.photobucket.com/albums/pp18/Abbeyman/TD%20estate/waterpump.jpg


Mick

replaced mine with metal impellor again as a precaution, but when i removed it it was perfect condition same as Micks above,
however mine has always run truck longlife antifreeze since ive had it, so dont think thats the reason? mine had 121k on the clock when i did it :y

You could always make one like this from the busted one  ;D

http://i61.photobucket.com/albums/h64/pickledpepper/PICT0276.jpg http://i61.photobucket.com/albums/h64/pickledpepper/PICT0278.jpg http://i61.photobucket.com/albums/h64/pickledpepper/PICT0279.jpg http://i61.photobucket.com/albums/h64/pickledpepper/PICT0280.jpg

All back together and working fine, just got to adjust the handbrake and stick some diesel magic in to clear emissions - and it will have 12 months test.

Ready to be sold in the new year now so watch this space!

By the way - the DIY pump is great! ;D