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10-19-2015, 11:27 AM | #1 |
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Lower water pump bolt
These bolts were installed ( appox, 4 years ago ) using what were thought to be cad. plated lock washers but were actually stainless steel.
Perfect example of the result of galvanic corrosion.
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10-19-2015, 11:55 AM | #2 |
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Re: Lower water pump bolt
Obviously a good thing you didn't wait five years! DD
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10-19-2015, 12:10 PM | #3 |
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Re: Lower water pump bolt
Do you run antifreeze?
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'52 F-1, EAB flathead |
10-19-2015, 12:15 PM | #4 |
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Re: Lower water pump bolt
Wonder if hard rubber washers would work better?
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10-19-2015, 12:19 PM | #5 |
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Re: Lower water pump bolt
Looks like the lock washers stood up, why didn't they use stainless bolts. Walt
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10-19-2015, 12:21 PM | #6 |
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Re: Lower water pump bolt
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10-19-2015, 12:22 PM | #7 |
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Re: Lower water pump bolt
Ya think? How 'bout stainless bolts with the requisite Nev-R-Seize? DD
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10-19-2015, 12:55 PM | #8 | ||
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Re: Lower water pump bolt
Quote:
Quote:
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10-19-2015, 01:05 PM | #9 |
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Re: Lower water pump bolt
Just removed this bolt from my water pump. It looks fine. I don't use any anti-freeze. Car always in garage.
Last edited by 39topless; 01-23-2016 at 12:01 AM. |
10-19-2015, 01:21 PM | #10 |
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Re: Lower water pump bolt
51Merc,
Those bolts look worse than most of the lower water pump bolts I've pulled out of rusty rancid old flatheads! I thought anti freeze had corrosion inhibitors in it? Martin. |
10-19-2015, 01:39 PM | #11 |
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Re: Lower water pump bolt
Corrosion inhibitors I don't believe would not do anything to prevent galvanic corrosion which is caused by two dis-similar metals. In this case a stainless washer. If the washer was a non stainless one the problem would for the most part, not happen.
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10-19-2015, 01:42 PM | #12 |
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Re: Lower water pump bolt
Bet if you install a stainless lock washer, after a period of time it would look just like the ones I removed.
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10-19-2015, 02:10 PM | #13 |
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Re: Lower water pump bolt
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10-19-2015, 02:54 PM | #14 |
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Re: Lower water pump bolt
Time to add a zink anode to the cooling system
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10-19-2015, 03:10 PM | #15 |
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Re: Lower water pump bolt
if there is galvanic action between cast and stainless steel, why aren't the stainless lock washers affected?.....they look pretty good compared to bolt head....Mike
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10-19-2015, 03:28 PM | #16 |
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Re: Lower water pump bolt
I have removed several water pumps that Henry installed and they were regular steel bolts. Although you would think that they would rust badly, I never had a problem with Henry's bolts. I guess Henry knew something about rust that we hadn't thought of.
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10-19-2015, 03:33 PM | #17 |
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Re: Lower water pump bolt
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10-19-2015, 03:39 PM | #18 |
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Re: Lower water pump bolt
Do we have an old high school chemistry teacher here? Now the nightmares will start again.
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10-19-2015, 04:01 PM | #19 |
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Re: Lower water pump bolt
Yep, that's the way I understand it to be.
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10-19-2015, 04:10 PM | #20 |
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Re: Lower water pump bolt
There are 3 conditions that must exist for galvanic corrosion to occur.
1) There must be electrochemically dissimilar metals present. 2) There must be an electrically conductive path between the two metals 3) There must be a conductive path for the metal ions to move from the more anodic metal to the more cathodic metal If anyone of these 3 conditions does not exist, galvanic corrosion will not occur. |
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