Quick, at store now.Threading size and pitch fan to pump bolts.
07-18-2018, 12:38 PM
Laughing Gas
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Join Date: Jul 2013
Location: clovis, CA
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Quick, at store now.Threading size and pitch fan to pump bolts.
What is the thread and pitch of the fan to water pump bolts. On 76 390
07-18-2018, 01:07 PM
Join Date: Sep 2014
Location: Bathurst, New Brunswick
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Searching but no joy. Sorry
07-18-2018, 01:27 PM
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I want to say 5/16"-18 but I cannot be certain.
07-18-2018, 04:29 PM
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Location: Regina, Saskatchewan
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My best guess is that it's the same as the Ford 400, even though it's a different motor.
Mine was 7/16 - 20 (fine thread, not coarse thread)
07-19-2018, 12:36 AM
Laughing Gas
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Thanks guys I appreciate it.
07-19-2018, 09:12 AM
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Did you get your fan bolts?
07-19-2018, 10:27 AM
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Usually,
7/16 socket = 1/4-20 or 1/4-20 thread
1/2 socket = 5/16-18 or 5/16-24 thread
9/16 socket = 3/8-16 or 3/8-24 thread
The thread is threads/inch. Less threads equal coarse. More threads equal fine.
07-19-2018, 08:51 PM
Laughing Gas
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Location: clovis, CA
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No, going to take the pump in with me and size them up. I will probably call ARP and see if they have stud and 12pts. That will match up.
07-20-2018, 01:26 AM
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Location: Indiana, PA
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