Water Pump Q - Alfa Romeo Bulletin Board & Forums
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post #1 of 16 (permalink) Old 10-19-2017, 03:26 PM Thread Starter
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Water Pump Q

I have the radiator out and am replacing hoses, belts...Should there be ANY wiggle/looseness in the water pump when I move the pulley? If not, how hard is the water pump replacement? I saw the documented version from 2010...is that it for an 84 Spider? Thank you in advance


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post #2 of 16 (permalink) Old 10-19-2017, 04:30 PM
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I have the radiator out and am replacing hoses, belts...Should there be ANY wiggle/looseness in the water pump when I move the pulley? If not, how hard is the water pump replacement? I saw the documented version from 2010...is that it for an 84 Spider? Thank you in advance


Luis
very easy there should be no play(wobble) whatsoever remove it make sure the replacement has the exact same pulley...

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post #3 of 16 (permalink) Old 10-19-2017, 05:01 PM Thread Starter
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Dang it...Thanks!! Will have to study the crap outta the water pump stuff..double nutting studs etc etc...

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post #4 of 16 (permalink) Old 10-19-2017, 08:26 PM
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The pulley CAN move in and out s l i g h t l y. This is the spring on the water stop seal allowing for normal seal carbon wear. However, NO WOBBLE, as that indicates the bearings are on the way to bearing heaven.


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post #5 of 16 (permalink) Old 10-21-2017, 09:20 AM Thread Starter
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I didn't detect any in out, but just a bit of up down...I also see that the fan (and the new one) has a deeper pocket and a more shallow pocket to place on the hub/pulley...of course I didn't pay attention when removing it..which end goes over the pulley, and If I recall, the metal washer/is on the outside for the bolts...Thanks again in advance for all the info..

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post #6 of 16 (permalink) Old 10-21-2017, 10:08 AM
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Up/Down = BAD! MONOR in/out = probably Ok. Deep end over the snout.
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post #7 of 16 (permalink) Old 10-21-2017, 11:51 AM
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I didn't detect any in out, but just a bit of up down...I also see that the fan (and the new one) has a deeper pocket and a more shallow pocket to place on the hub/pulley...of course I didn't pay attention when removing it..which end goes over the pulley, and If I recall, the metal washer/is on the outside for the bolts...Thanks again in advance for all the info..
I don't want you to think I am being a smarta-s... use your cell phone camera as you disassemble...
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post #8 of 16 (permalink) Old 10-21-2017, 12:57 PM Thread Starter
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Not thinking that at all..I should have taken pics, at at least taken notes (better than I did)...lessons learned...

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post #9 of 16 (permalink) Old 10-21-2017, 01:01 PM
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Not thinking that at all..I should have taken pics, at at least taken notes (better than I did)...lessons learned...
I do it all the time...

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post #10 of 16 (permalink) Old 10-21-2017, 01:41 PM
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While you're at it have the radiator descaled and flow tested,pressure tested... the original core are so superior to recores.. any good rad shop can do it for about a $100 I repaint with epoxy some powder coat the rad shops use heat resistant paint ...but usually to glossy..
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post #11 of 16 (permalink) Old 10-21-2017, 03:14 PM Thread Starter
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Picking it up Monday! It has been 28 years since I had it done...

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post #12 of 16 (permalink) Old 10-21-2017, 05:39 PM
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One of the reasons water pump bearings wear out is the owner or mechanic over-tightens the belt tension. This puts high loads on the bearings in the water pump and the alternator. In earlycars it also can lead to cracks in the mainsheet pulley - along the keyway slot. That will eat up front crankshaft seals and start sharing all your oil with the rest of the engine and undercarriage.

Robert
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post #13 of 16 (permalink) Old 10-21-2017, 07:14 PM
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In racing, (and street use with race engines) non-notched belts, loose enough to slip at high rpm, work best. This avoids water pump cavitation and alternator / generator blow-ups.
Water pump and generator / alternator bearings also last many many years.


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post #14 of 16 (permalink) Old 10-21-2017, 09:24 PM Thread Starter
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EXCELLENT info re belt tension, as I would certainly have tightened the deal out of it...

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post #15 of 16 (permalink) Old 10-22-2017, 06:53 PM
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Quote:
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One of the reasons water pump bearings wear out is the owner or mechanic over-tightens the belt tension. This puts high loads on the bearings in the water pump and the alternator. In earlycars it also can lead to cracks in the mainsheet pulley - along the keyway slot. That will eat up front crankshaft seals and start sharing all your oil with the rest of the engine and undercarriage.

Robert
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