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FE Power Forums => FE Technical Forum => Topic started by: jayb on May 09, 2020, 03:34:59 PM

Title: Guess what's going on in this picture
Post by: jayb on May 09, 2020, 03:34:59 PM
A friend sent me this picture.  The transmission has been removed, and the picture is taken looking into the back end of the crankshaft.  What do you guys make of that?  I will post the full story a little later...

(http://fepower.net/Photos/Posts/DaveLpilot.jpg)
Title: Re: Guess what's going on in this picture
Post by: drdano on May 09, 2020, 03:36:16 PM
Super lightened racing crankshaft with Invisi-Journal(tm) technologies?   ;D
Title: Re: Guess what's going on in this picture
Post by: blykins on May 09, 2020, 03:44:51 PM
Somebody left the cup plug out of the rear of the crank. 
Title: Re: Guess what's going on in this picture
Post by: GJCAT427 on May 09, 2020, 03:46:39 PM
Looks like a piece of the flywheel mount ring broke and the bolt snapped too. Whats the rest of the flywheel look like?
Title: Re: Guess what's going on in this picture
Post by: jayb on May 09, 2020, 03:51:09 PM
Quote from: blykins on May 09, 2020, 03:44:51 PM
Somebody left the cup plug out of the rear of the crank.

Smarty pants, I should have banned you from responding to this one LOL!  SCAT left the cup plug out.  My friend called them and they said "Oops"!  Motor got installed and then developed a fairly serious leak out the pilot bushing.  No wonder...
Title: Re: Guess what's going on in this picture
Post by: blykins on May 09, 2020, 04:09:14 PM
It happens.

Some builder who shall remain nameless left one out of the end of a Bryant crank.  Hard to pull vacuum on a crankcase like that. 
Title: Re: Guess what's going on in this picture
Post by: Daveb9 on May 11, 2020, 08:01:27 PM
Called SCAT when this happened. They admitted that it was there screw up. They offered to send me an $.83 frost plug. It arrived today, three weeks later. Needless to say I didn’t wait for it. Back together and runs great.

Dave
Title: Re: Guess what's going on in this picture
Post by: Barry_R on May 12, 2020, 12:28:57 AM
They caught me by leaving one out once.  Even made it past dyno.  The drive plate used with a DTS dyno snugs right up against the back of the crank and effectively blocks that off.  Pre-oiled when already mounted to the cart.  Did not realize until we dismounted and it drooled on the floor....installed plug and a quick retest just to be safe...
Title: Re: Guess what's going on in this picture
Post by: wowens on May 12, 2020, 05:17:38 AM
OK, I give up. Since nobody volunteered a answer, what is the thing visible in the hole with gear teeth ?
Title: Re: Guess what's going on in this picture
Post by: 70tp on May 12, 2020, 05:23:18 AM
Rod bolt
Title: Re: Guess what's going on in this picture
Post by: HarleyJack17 on May 12, 2020, 08:42:14 AM
That is what threw me. I knew quick it was a hole in the crank and that was a rod bolt, but what does not make sense to me is "how". The rods are off center of a crank by a good margin so I am scratching my head on how they would show up in the pic through the center of the crank....maybe it is the angle of the picture...new news to me on how they stop that hole up...learn something everyday.
Title: Re: Guess what's going on in this picture
Post by: Falcon67 on May 12, 2020, 09:05:13 AM
It's a thermal inspection port, right below the main port.
Title: Re: Guess what's going on in this picture
Post by: blykins on May 12, 2020, 09:44:07 AM
It's only on steel cranks that are gundrilled up through the mains. 
Title: Re: Guess what's going on in this picture
Post by: cjshaker on May 12, 2020, 09:50:10 AM
So how does a gundrilled crank get oil to the rods?