 Cooling fan woodruff key, Crank is damaged |
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| malcolm2 |
 Feb 25 2023, 06:44 AM
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#1
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Advanced Member  Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States 
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Have only run maybe 4 gallons of gas thru a new rebuiltengine. Ran on the bench and recently installed. My cooling fan came loose.
Woodruff key is damaged along with the slot in the crank where it sits. Hub too. Is there a way to suitably repair the crank without total engine removal and teardown ? |
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| Olympic 914 |
Feb 26 2023, 01:24 PM
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#2
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Group: Members Posts: 1,738 Joined: 7-July 11 From: Pittsburgh PA Member No.: 13,287 Region Association: North East States
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Looks like something that should be done on every engine build, but no one tells you about it.
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| malcolm2 |
Feb 26 2023, 02:04 PM
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#3
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
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QUOTE(Olympic 914 @ Feb 26 2023, 01:24 PM)  Looks like something that should be done on every engine build, but no one tells you about it. Like the propeller installation link, I added. He states in that every new prop should have that done to match the new prop and the old shaft. So for your comment if you have a new hub or a new crank, then it makes sense that the taper should be lapped using the parts that the engine will run with. I did not do that. Used gifted crank and an unknown hub. Oops on me. |
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Posts in this topic
malcolm2 Cooling fan woodruff key Feb 25 2023, 06:44 AM
930cabman
Have only run maybe 4 gallons of gas thru a new r... Feb 25 2023, 06:52 AM malcolm2 I can't imagine that this will be JB Weld kind... Feb 25 2023, 07:40 AM malcolm2 moved the light and zoomed in.
Feb 25 2023, 07:41 AM
Bartlett 914
moved the light and zoomed in.
It looks like t... Feb 25 2023, 08:17 AM
porschetub
moved the light and zoomed in.
Thats pretty se... Feb 25 2023, 02:28 PM malcolm2 RE: Cooling fan woodruff key Feb 25 2023, 07:43 AM barefoot Just trial fit a new woodruff key it the slot to s... Feb 25 2023, 07:57 AM malcolm2
Just trial fit a new woodruff key it the slot to ... Feb 25 2023, 08:04 AM malcolm2 Yes, the pulley was loose. ALT belt vibrating lik... Feb 25 2023, 08:27 AM Dave97 I had the same thing happen, except the fan came l... Feb 25 2023, 08:35 AM malcolm2
I had the same thing happen, except the fan came ... Feb 25 2023, 10:15 AM mgphoto New key tack welded to the crank. JB Weld could cr... Feb 25 2023, 10:17 AM malcolm2
New key tack welded to the crank. JB Weld could c... Feb 25 2023, 11:09 AM Superhawk996 First up - let’s talk about how this is designed... Feb 25 2023, 12:05 PM 930cabman I might dress down the material proud of the taper... Feb 25 2023, 12:11 PM Superhawk996
it does resist the pumping action of the fan
Neg... Feb 25 2023, 12:20 PM malcolm2 As I did some lapping for about 45 minutes and cle... Feb 25 2023, 03:37 PM Superhawk996 Don’t worry about pits below the surface, make s... Feb 25 2023, 05:08 PM 930cabman Also get some prussian blue to ensure there is a h... Feb 25 2023, 05:14 PM blabla914 Superhawk has your back here. I'll add to his ... Feb 25 2023, 05:24 PM malcolm2 Amazon has let me down. I did purchase the Prussi... Feb 26 2023, 08:20 AM ClayPerrine 30+ years ago we lost the fan on Betty's 914 a... Feb 26 2023, 09:33 AM technicalninja
Amazon has let me down. I did purchase the Pruss... Feb 26 2023, 10:21 AM malcolm2 I remember lapping my Ski Nautique prop and using ... Feb 26 2023, 11:49 AM Superhawk996 I could see pictures just fine. That can’t be a... Feb 26 2023, 11:59 AM malcolm2 he called it MULTI-THOUSAND dollar prop, so yes. ... Feb 26 2023, 12:53 PM porschetub
he called it MULTI-THOUSAND dollar prop, so yes. ... Feb 27 2023, 05:11 PM bkrantz
he called it MULTI-THOUSAND dollar prop, so yes.... Feb 27 2023, 08:33 PM ClayPerrine
[quote name='porschetub' post='3061365' date='Feb... Feb 28 2023, 07:15 AM Superhawk996
Take a 1 inch wide strip of all-mag about 3 inche... Feb 28 2023, 08:29 AM ClayPerrine
Take a 1 inch wide strip of all-mag about 3 inch... Feb 28 2023, 09:42 AM Superhawk996 That’s starting to look pretty good. Might lap ... Feb 26 2023, 01:15 PM Superhawk996
That’s starting to look pretty good. Might lap... Feb 26 2023, 01:39 PM 930cabman I would want to see at least 80 or 90% contact are... Feb 27 2023, 06:36 PM |
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