Rich
Club Retro Rides Member
Posts: 6,245 
Club RR Member Number: 160
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BMW M10 Water pump failure. Rich
@foxmcintyre
Club Retro Rides Member 160
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Jul 27, 2017 18:04:31 GMT
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Right. Time to pick your collective brains. BMW E28 518i with an M10B18 engine.
Replaced the water pump because the bearings failed and it was weeping water. Fitted a 'premium' brand one from GSF, never heard of it, lasted a few weeks before it started weeping from the weep holes. Got refunded, replaced with a Febi Bilstien unit, months later, weeping again.
Pump has 2 holes, top and bottom. I can't fathom any reason for the repeated failure. Belt isn't too tight, viscous fan coupling is a new Borg Warner unit, fan is in good condition as far as one can tell.
Any thoughts on why it keeps doing this? My short term thoughts are block the holes up but this won't last forever like that. I am loath to pay over £100 for a genuine pump but I am also not sure what to try next.
Halp plz!
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Jul 27, 2017 18:40:48 GMT
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is the belt running true ? a few mm either side it would destroy the bearings in no time
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Rich
Club Retro Rides Member
Posts: 6,245
Club RR Member Number: 160
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BMW M10 Water pump failure. Rich
@foxmcintyre
Club Retro Rides Member 160
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Jul 27, 2017 19:21:04 GMT
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It's a good thought. I know the alternator on this is rubber bushed and it could be that that is running out of line on perishing bushes. Something to look at.
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Jul 27, 2017 19:38:26 GMT
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Alternator mounts are a very, very common issue - been there done that. I can't comment on the GSF supplied part as I only buy leading brand parts like Febi. But, I don't think Febi are the quality part that they were once considered. Obviously, I can't back that comment up with facts as it's just my gut feeling. I now try and buy Lemforder instead.
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Last Edit: Jul 27, 2017 20:26:43 GMT by Woofwoof
Still learning...still spending...still breaking things!
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Jul 27, 2017 20:20:12 GMT
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don't just look at it at tickover get someone to rev it and watch the belt . A good idea use a timing light to shine on it you will instantly see if it pulls out of line
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Rich
Club Retro Rides Member
Posts: 6,245
Club RR Member Number: 160
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BMW M10 Water pump failure. Rich
@foxmcintyre
Club Retro Rides Member 160
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Jul 27, 2017 20:31:10 GMT
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I have a timing light on my Crypton Motortune Major and TBF I did want to see if the timing is right so a good excuse..
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steveg
Posted a lot
Posts: 1,565
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Jul 27, 2017 20:51:56 GMT
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I've had a bit of a battle in the past with water pumps on my Volvo 940. For my car there only seem to be a couple of manufacturers. Even Volvo don't sell proper genuine ones now, if they did I would almost stump up a couple of hundred quid to get one. As it is the ones they sell are around the £75 and are made by what was Quinten Hazel in Wales.
If you haven't got any problems with belt alignment, which shouldn't make the pump leak unless the belt is very tight, make sure the cooling system is flushed out as well as you can get it. If there is a lot of bits floating round they can find their way into the seals and stop whem working properly.
I would be tempted to get a genuine pump although it might be worth doing a bit of research to see who makes them for BMW now as they might also sell them through motor factors.
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ChasR
RR Helper
motivation
Posts: 10,192
Club RR Member Number: 170
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BMW M10 Water pump failure. ChasR
@chasr
Club Retro Rides Member 170
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Jul 28, 2017 12:36:01 GMT
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A friend of mine who works for BMW gets a few bits from other suppliers.
But for the water pumps he insists on going genuine.
That said I'd check the alignment first. The other thing to do is to see if your bleed off hoses or bleed off intakes are blocked. It's an unlikely cause but you never know.
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Rich
Club Retro Rides Member
Posts: 6,245
Club RR Member Number: 160
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BMW M10 Water pump failure. Rich
@foxmcintyre
Club Retro Rides Member 160
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Jul 28, 2017 17:37:56 GMT
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That said I'd check the alignment first. The other thing to do is to see if your bleed off hoses or bleed off intakes are blocked. It's an unlikely cause but you never know. Doesn't have any. It's a top-fill radiator on a 518. exceptionally simple cooling system layout. |
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820
South East
Posts: 790
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Jul 28, 2017 18:05:36 GMT
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One of the reasons you pay more for genuine parts is they are better quality, another is the BMW dealerships use them and you get a warranty with them that might well include you get it diagnosed and fixed in the dealership workshop.
You might be surprised how good the prices are too.
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Last Edit: Jul 28, 2017 18:06:07 GMT by 820
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ChasR
RR Helper
motivation
Posts: 10,192
Club RR Member Number: 170
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BMW M10 Water pump failure. ChasR
@chasr
Club Retro Rides Member 170
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Jul 28, 2017 18:50:36 GMT
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They come with a 2 year warranty, same as VAG parts from the dealer.
I used to shy away from the dealers but these days I find myself going to them more, especially after last April where I got messed about by a large online motor factor.
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Rich
Club Retro Rides Member
Posts: 6,245
Club RR Member Number: 160
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BMW M10 Water pump failure. Rich
@foxmcintyre
Club Retro Rides Member 160
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Jul 28, 2017 20:02:18 GMT
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One of the reasons you pay more for genuine parts is they are better quality, another is the BMW dealerships use them and you get a warranty with them that might well include you get it diagnosed and fixed in the dealership workshop. You might be surprised how good the prices are too. £171 is the list price I believe. I am no stranger to OE over aftermarket quality, I have worked 10 years now as a vehicle tech but never before have I come across such an odd persistent failure. I have ordered an OE-manufacturer branded pump and I am being refunded on the Febi pump despite it being fitted 7 months ago. Will see how it pans out and report back after an alignment check, coolant flush and I am going to change brand of antifreeze too, as a precaution.. |
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ChasR
RR Helper
motivation
Posts: 10,192
Club RR Member Number: 170
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BMW M10 Water pump failure. ChasR
@chasr
Club Retro Rides Member 170
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Jul 28, 2017 22:28:19 GMT
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I've had issues with coolant in the past.
In cars I don't put OAT into I fill them with Glytasyn G48 ; it's about the only 'old school' coolant I've had that doesn't look like rust when I drain it again.
Fingers are crossed that you get to the bottom of it.
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steveg
Posted a lot
Posts: 1,565
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The info I got about water pumps came from someone at Firstline who deals with warranty problems. What he was saying was very interesting but it didn't sound like there was much over engineering going into the products if slightly less than perfect coolant could cause a problem.
I bought a cheap factors water pump to replace a leaking 6 month old genuine Volvo one, the name escapes me now but I thought it worth trying a quality German made one only to find it was exactly the same casting and probably the same seals and bearings.
I hope you get the problem sorted out, something that shouldn't happen but if people won't buy quality parts manufacturers will find ways to get the prices down so they will. In most cases parts only need to last for the length of the warranty.
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Hepu water pumps are highly rated on the American BMW sites. German, metal impeller and good bearings. Got one on my e39 530i with no issues. Might be worth looking at if a genuine one is too expensive.
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Rich
Club Retro Rides Member
Posts: 6,245
Club RR Member Number: 160
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BMW M10 Water pump failure. Rich
@foxmcintyre
Club Retro Rides Member 160
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I've had issues with coolant in the past. In cars I don't put OAT into I fill them with Glytasyn G48 ; it's about the only 'old school' coolant I've had that doesn't look like rust when I drain it again. Fingers are crossed that you get to the bottom of it. Found that halfords stock that so on your recommendation have gone for it and will be giving the cooling system the mother of all flushes. |
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ChasR
RR Helper
motivation
Posts: 10,192
Club RR Member Number: 170
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BMW M10 Water pump failure. ChasR
@chasr
Club Retro Rides Member 170
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I've had issues with coolant in the past. In cars I don't put OAT into I fill them with Glytasyn G48 ; it's about the only 'old school' coolant I've had that doesn't look like rust when I drain it again. Fingers are crossed that you get to the bottom of it. Found that halfords stock that so on your recommendation have gone for it and will be giving the cooling system the mother of all flushes. Good call! They do indeed stock it and it's cheaper on the trade card. FWIW it's adheres to BMW's spec until the very new cars came out. |
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Rich
Club Retro Rides Member
Posts: 6,245
Club RR Member Number: 160
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BMW M10 Water pump failure. Rich
@foxmcintyre
Club Retro Rides Member 160
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Found that halfords stock that so on your recommendation have gone for it and will be giving the cooling system the mother of all flushes. Good call! They do indeed stock it and it's cheaper on the trade card. FWIW it's adheres to BMW's spec until the very new cars came out. The bottle claims to be within BMW spec and was indeed cheaper on trade card. Flushed today, got a lot of crud out of the system that has obviously lurking. Whether it's the issue I do not know but comparing the Febi pump that was leaking to the Meyle pump I am fitting there is a clear difference is quality. The outlet on the Febi pump is blocked by the bearing casting which looks cr@p for pump flow.. |
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