What Size Set Screw?

croSSeduP · Posted: Fri Apr 09, 2021 10:09 pm Post subject: What Size Set Screw?

Went to crank for oil pressure before firing my motor for the first time and had a HUGE oil leak. How in the world I missed this... d'oh!

Oh, well. Any idea what the size of these threads are so I can get the correct set screw? Is there a "standard" set screw size among those who do case machining? Thanks!

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txoval · Posted: Sat Apr 10, 2021 5:32 am Post subject: Re: What Size Set Screw?

Should be 1/16” NPT

Brian_e · Posted: Sat Apr 10, 2021 5:55 am Post subject: Re: What Size Set Screw?

It should be a pipe plug, and not a set screw.

That location also had a long stepped dowel plug in the hole. Different from all the other plugs. Some say the step is to regulate the flow to the #4 bearing, some say it's more of a filter to stop big chunks from getting to the tiny oil hole in the bearing. I agree with the latter.

I never pull or replace that plug. Just clean the passage good and leave the stepped plug in place.

Go get a 1/16npt pipe plug and put it in there.

Brian
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