So... this was in my oil drain pan...
 

https://www.zr1.net/forum/picture.ph...pictureid=4547
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pretty sure it wasn't there before I drained the oil

Re: So... this was in my oil drain pan...
 

Right before I changed the oil I noticed the oil pressure was a bit low at idle and the oil temp was a bit higher than usual. I have a bad feeling this is an oil control plug of some sorts but I'm not having much luck IDing it in the FSM. Anyone have a guess on where this came from?

Re: So... this was in my oil drain pan...
 

looks like one of the crankshaft oil gallery plugs

Re: So... this was in my oil drain pan...
 

I agree with Phil. Ties in with your oil pressure observation.

Re: So... this was in my oil drain pan...
 

I found the crank diagram in the FSM, looks like there are 4 plugs in the crankshaft. Is this doable from the bottom by removing the oil pan? Looks like it might be.

Re: So... this was in my oil drain pan...
 

I was just talking to Petey about it. Looks like I'll be ordering a plug and a oil pan gasket from you Jerry

Re: So... this was in my oil drain pan...
 

Make sure you install that with Red Loctite and if you can access any of the others, remove them and Loctite them, too.

I've never heard of one of those coming out and, man, with that missing, I'll bet the oil pressure was low.

Interesting that something 5.25-in in diameter would fit though the drain plug hole, but then, I guess I don't remember how large it was.

Re: So... this was in my oil drain pan...
 

I was actually mentally debating that... removing all of them and re-loctiting. My idle oil pressure was about half of normal, luckily I was close to home. And yeah it must have just barely fit through the drain hole, and I'm sure glad it did or I'd have no idea what was going on. It's .525 btw, 5.25 would surely be a no-go lol

Re: So... this was in my oil drain pan...
 

The front crankshaft throw has a 1/4" npt pipe plug on the forward side and a 3/8" npt plug on the aft side. The remaining 3 throws have 1/4" npt plug on both fore and aft sides. I use hardened steel plugs from the hydraulic supply store. Stay away from the soft plugs you find the local hardware store.


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Re: So... this was in my oil drain pan...
 

All plugs are easy to get at once the pan is dropped. While in their might check to make sure the press in plugs are still fully seated. Very lucky the plug came out through the drain hole.


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