Does anyone know where I can get a water pump seal, or the part number of a suitable seal. I have tried all the major seal manufacturers but anything they seem to have is either too tall or requires the housing recess to be machined. They must be still available as people make replacement pumps (unless they have a different seal in).
Thanks
Neil
Water pump seal
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Phil
Re: Water pump seal
Hi Neil,
Waterpumps and Fulvia's!!!!! How many stripped pumps do you want.... I have many and there seems to be several different variants. I have always had to have the housing recessed, but be careful it leaves very little metal to hold the seal, but if you don't rcecess it sufficiently, the cover doesn't fit with sufficient clearance. My best experience is with the brass wheel rather than the cast iron wheel, which is apparently the better one.
Phil
South Africa
Waterpumps and Fulvia's!!!!! How many stripped pumps do you want.... I have many and there seems to be several different variants. I have always had to have the housing recessed, but be careful it leaves very little metal to hold the seal, but if you don't rcecess it sufficiently, the cover doesn't fit with sufficient clearance. My best experience is with the brass wheel rather than the cast iron wheel, which is apparently the better one.
Phil
South Africa
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Neil
Re: Water pump seal
Phil,
Mine has the brass wheel, and other than the seal and bearing is in tip top condition. I can get the bearing, but the seal is proving difficult (for exactly the reason you say). However I am on the case with a seal manufacturer so I haven't given up yet ! If I find a solution I shall report back.
Neil
Mine has the brass wheel, and other than the seal and bearing is in tip top condition. I can get the bearing, but the seal is proving difficult (for exactly the reason you say). However I am on the case with a seal manufacturer so I haven't given up yet ! If I find a solution I shall report back.
Neil
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Huib Geurink
Re: Water pump seal
I would be very happy to have a a source for the original mechanical seal for the original pump. Later pumps have different seals (even vary from batch to batch) and often bearings of inferior quality. Taking these pumps apart to replace the bearing with a good one is often destructive for the seal.
BTW, a good bearing is the NSK one with DSD seals. It is stronger and the DSD seal is reasonably good as an oil seal even if designed to be a grease seal. The inner and outer diameter of the bearing is correct. The width is less. IF I remember correctly this is the same bearing that goes into the radiator fan of the series 1. The original bearing of the waterpump has the same diameters but is wider. This is no longer a preferred type, therefore expensive and its quality has not evolved over time. I use the thinner one and compensate with shim rings.
The spindle of the waterpump goes into the cog wheel on the engine. The flat side on the spindle is the oil channel for the bearings of the cog wheel. You don't want the oil to squirt out from the gap between the spindle and the shaft of the cog wheel. Later pumps have an O ring on the spindle to close this gap. Early ones have not. I recommend to turn a groove on the spindle and mount an O ring.
BTW, a good bearing is the NSK one with DSD seals. It is stronger and the DSD seal is reasonably good as an oil seal even if designed to be a grease seal. The inner and outer diameter of the bearing is correct. The width is less. IF I remember correctly this is the same bearing that goes into the radiator fan of the series 1. The original bearing of the waterpump has the same diameters but is wider. This is no longer a preferred type, therefore expensive and its quality has not evolved over time. I use the thinner one and compensate with shim rings.
The spindle of the waterpump goes into the cog wheel on the engine. The flat side on the spindle is the oil channel for the bearings of the cog wheel. You don't want the oil to squirt out from the gap between the spindle and the shaft of the cog wheel. Later pumps have an O ring on the spindle to close this gap. Early ones have not. I recommend to turn a groove on the spindle and mount an O ring.
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neil
Re: Water pump seal
Huib,
Thanks for that. I had seen some photos of new pumps and wondered what the O ring was for. I have found a teflon seal from a motorbike waterpump that is almost the same dimensions (31mm vs 26mm on diameter). It is the height that is the problem, all the seals I can find are 15mm + high with a compressed spring, where as the Fulvia seal is 10-11mm. I can accomodate a small variation through reducing the thickness of the steel running surface on the impellor (this needs smoothing on a stone anyway), but not 5 mm, and I am not keen on machining the housing. I will have a trip to a motor bike garage this weekend to see what they have.
The bearing I have discussed with my local bearing shop is a sealed bearing, and will as you say require shimming. I will check what make it is when I pick it up.
Thanks all
Neil
Thanks for that. I had seen some photos of new pumps and wondered what the O ring was for. I have found a teflon seal from a motorbike waterpump that is almost the same dimensions (31mm vs 26mm on diameter). It is the height that is the problem, all the seals I can find are 15mm + high with a compressed spring, where as the Fulvia seal is 10-11mm. I can accomodate a small variation through reducing the thickness of the steel running surface on the impellor (this needs smoothing on a stone anyway), but not 5 mm, and I am not keen on machining the housing. I will have a trip to a motor bike garage this weekend to see what they have.
The bearing I have discussed with my local bearing shop is a sealed bearing, and will as you say require shimming. I will check what make it is when I pick it up.
Thanks all
Neil
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Huib Geurink
Re: Water pump seal
I checked the bearings I have in stock. The type of seal on the NSK bearings is DD.
I am not sure how much you can grind away of the running surface on the impeller. It should be a hard material ideally widia and as smooth as possible.
I am not sure how much you can grind away of the running surface on the impeller. It should be a hard material ideally widia and as smooth as possible.