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Post by wayne on Dec 9, 2010 19:21:16 GMT -5
just wondering if anyone else has tried to rebuild there old water pump....i just got and installed the one from rock auto and its working good but id like to keep the old one and try rebuilding it...i pulled the hub off that the fan clutch/pulley bolts too and removed the snap ring but now dont know what to do next, i see the part number for the bearing and i found it on the internet but obviously need to dissamble it the rest of the way to put new bearings in it...hopefully someone on here has done it and can help, as rockauto told me the one i got is the last one they showed avaiable anymore...
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johno
Full Member
Posts: 220
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Post by johno on Dec 10, 2010 21:25:44 GMT -5
I haven't tried rebuilding the water pump in my Mazda or Ford, but have some experience with other vehicles. In my experience, most cities of more than a few thousand people have at least one repair shop that can press-apart your water pump for a small fee. If you're lucky, you'll have a bearing supply business in the town, too. I've pressed-apart other water pumps, taken the old bearings and (most important) the old seal to them, and they've always been able to give me replacements off the shelf! There don't seem to be that many different varieties of bearings or seals used. They've also been cheap - bearings seem to cost less than $10 each, and the seals are about the same or less! You will have a bigger problem if the shaft is damaged, but a machine-shop can fix that in most cases. Water pumps aren't complex or difficult to work on, but do require a press to take apart and put together.
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Post by wayne on Dec 11, 2010 3:04:50 GMT -5
i have a press and and all other tools to the job, theres no shop around me that rebuilds them, place about 45 minutes away is a radiator shop and they didnt even want to rebuild it for me, so i figured i would do it myself...where im at is im not sure if i should pull the impeller off the shaft as well or just try and press the whole shaft out and leave the impeller on it??? im afraid of breaking the impeller if i try to pull it off the shaft so thats why i dont want to do that without asking for advice...if i knew what to do, removing/installing the new seals/bearings would be easy but i just dont want to damage anything by pulling on or pressing on things that shouldnt be...anymore more info would be appreciated
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johno
Full Member
Posts: 220
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Post by johno on Dec 16, 2010 0:24:02 GMT -5
My factory training manual describes water pump rebuilding as follows: 1) remove the pulley boss by pressing the shaft out while supporting the boss with a suitable tool (49 0636 145) 2) Remove the bearing shaft from the impeller and bearing housing by using the support block and press (the picture shows the pump housing supported while the shaft is pushed through the impeller from the "engine side" using a rod) 3) remove the snap ring and press out the shaft from the bearings (the picture shows the press pushing the shaft using a rod while the two bearings are supported on blocks. There's a spacer sleeve between the bearings) 4) before installing, apply lithium grease in to approximately 1/3 of the space between the bearings. Also on the surface of the water seal in contact with the impeller. Part of the seal is in the back-side of the impeller. The instructions also say to replace the impeller if the seal contact surface is faulty. I hope that's not the case. I'm not well set up to scan the pages, but perhaps someone else is? A picture or two would likely help your confidence level. It doesn't look difficult. Cheers, JohnO
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Post by westycat on Dec 16, 2010 10:10:53 GMT -5
Wayne,
Rock Auto now show a rebuild service for less than $50.00. You send your pump to the shop, and they have it rebuilt in 3-5 days. That's what I would do.
Ben
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Post by wayne on Dec 18, 2010 13:00:23 GMT -5
there site still shows 130 and if you read the rebuild and return policy it says its still the same price as shown but will take longer, i will probably try and rebuild it this summer, no hurry for it right now...johno thanks for the procedure, it does seem pretty simple, and much cheaper than another 148 bucks...ill let everyone know once i get it done and how it all went
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