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12-03-2018, 03:33 PM | #1 |
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water pump bolt
Before I try to change the waterpump on the 59AB engine in my 40, what is the size (thread pitch and length) of the "hidden" bolt??
Had the driver's side let out a horrendous noise while coming back from a ride y/day, lots of leakage . New pumps ordered. Thanks in advance Paul in CT |
12-03-2018, 03:45 PM | #2 |
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Re: water pump bolt
I think it's 3/8-16 x 1 1/8. Use a stainless bolt with anti-seize.
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12-03-2018, 03:46 PM | #3 |
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Re: water pump bolt
I would also use a six point socket
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12-03-2018, 06:26 PM | #4 |
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Re: water pump bolt
Forgot to say; Don't use a washer as it's not needed.
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12-03-2018, 06:54 PM | #5 |
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Re: water pump bolt
Use a stainless allen head. No washer.
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12-03-2018, 09:03 PM | #6 |
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Re: water pump bolt
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Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1947 Tonner Pickup (red) mostly stock with exception of a cummins 6at turbo diesel, 1946 Tonner Pickup (green) with 226 cu in 6 cyl flathead, 1979 Toyota landcruiser wagon, completely encased in 1947 Ford Jailbar sheet metal. Ok, cornbinder rear fenders..... 'Rusty ol' floorboards, hot on their feet' (Alan Jackson) |
12-03-2018, 09:13 PM | #7 | |
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Re: water pump bolt
Quote:
Paul you should have no problem removing the original bolt as mentioned earlier use a six point socket. No need for the stainless bolts or allens a good quality bolt will work perfectly if you find the one you remove is in need of replacement. The size of the bolt is identical to the three exposed you remove Ronnieroadster
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I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH Last edited by Ronnieroadster; 12-03-2018 at 09:19 PM. |
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12-03-2018, 09:17 PM | #8 |
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Re: water pump bolt
Just curious why the allen head would be better? When I pulled my motor the second time to do a frame off, I replaced the allen head bolts with stainless hex heads. I don't like 12 point sockets. (not sure why they make them)
Certainly anti-seize on that one, be kind to the next guy . Well... I do it on most engine bolts, just because it doesn't hurt anything. (note*** torque settings change with anti-seize applied, it acts like a lubricate, heads more notable but probably not that significant for the average bear). You can fix most stuff on the side of the road with a 1/2 and 9/16s on a ford, maybe a 5/8s wrench. If you need more, ya might need to get into a shop then too. . Last edited by Tinker; 12-03-2018 at 10:07 PM. |
12-03-2018, 09:33 PM | #9 |
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Re: water pump bolt
here in the now frozen swamp, i put a drop of oil or antiseize on every thing
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12-03-2018, 10:30 PM | #10 |
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Re: water pump bolt
The original bolt was CAD plated (S7) finish. If I don't have a NOS one I use SS.
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12-03-2018, 10:38 PM | #11 |
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Re: water pump bolt
One thing to keep in mind is stainless will break a lot easier (lower torque) and higher grade standard bolts.
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12-03-2018, 10:39 PM | #12 |
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Re: water pump bolt
What are the thoughts on using a nickel bolt? Some have suggested a bronze bolt in the past but the nickel bolt appears to have more strength (I think ).
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12-03-2018, 10:40 PM | #13 |
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Re: water pump bolt
...
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12-03-2018, 10:42 PM | #14 |
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Re: water pump bolt
torque values are around 20lbs. If you use a wood bolt you are probably in trouble. Stainless on that bolt is not a bad idea, same for some anti-sieze.
But.... 30-80s yrs from now! Who cares |
12-03-2018, 10:44 PM | #15 |
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Re: water pump bolt
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12-03-2018, 10:58 PM | #16 |
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Re: water pump bolt
The 20 ft/lb value is dry torque, lubricated (anti-sieze) would be around 17. Iĺl be the odd man out here, I would not (and do not) use a stainless bolt in the internal water pump location.
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12-03-2018, 11:09 PM | #17 |
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Re: water pump bolt
I have pulled apart maybe 20 engines and have never broken a water pump hidden bolt or an exhaust manifold bolt. All of these were from really long sitting trucks. I've never bought a runner. The hidden bolt looks like it would be a huge problem, but in my experience, they just unscrew.
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Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1947 Tonner Pickup (red) mostly stock with exception of a cummins 6at turbo diesel, 1946 Tonner Pickup (green) with 226 cu in 6 cyl flathead, 1979 Toyota landcruiser wagon, completely encased in 1947 Ford Jailbar sheet metal. Ok, cornbinder rear fenders..... 'Rusty ol' floorboards, hot on their feet' (Alan Jackson) |
12-07-2018, 02:09 PM | #18 |
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Re: water pump bolt
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12-03-2018, 11:01 PM | #19 |
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Re: water pump bolt
you are certainly not wrong JS. I just don't think its that dire of a decision. Agreed a regular bolt will be fine for a long time, I also don't think you could definitely say a stainless bolt will be bad 5-80yrs from now. Torquing it to 15-25 probably wont hurt anything either.
Last edited by Tinker; 12-03-2018 at 11:22 PM. |
12-03-2018, 11:06 PM | #20 |
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Re: water pump bolt
Those original bolts have been in there for upwards of 70 years. I have never had one I could not get out.
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