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12-08-2020
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#1 |
 Join Date: Jan 2004
Location: Portland, OR
Posts: 1,057
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So... this was in my oil drain pan...
https://www.zr1.net/forum/picture.ph...pictureid=4547
pretty sure it wasn't there before I drained the oil
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Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
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12-08-2020
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#2 |
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Join Date: Jan 2004
Location: Portland, OR
Posts: 1,057
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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?
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Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
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12-08-2020
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#3 |
 
Join Date: Apr 2007
Location: Northern VA
Posts: 2,661
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Re: So... this was in my oil drain pan...
looks like one of the crankshaft oil gallery plugs
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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12-08-2020
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#4 |
Join Date: Dec 2003
Location: Arcadia,OK
Posts: 3,394
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Re: So... this was in my oil drain pan...
I agree with Phil. Ties in with your oil pressure observation.
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Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
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12-08-2020
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#5 |
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Join Date: Jan 2004
Location: Portland, OR
Posts: 1,057
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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.
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Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
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12-08-2020
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#6 | |
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Join Date: Jan 2004
Location: Portland, OR
Posts: 1,057
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Re: So... this was in my oil drain pan...
Quote:
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Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
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12-08-2020
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#7 |
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Join Date: Jun 2005
Location: CenCoast California
Posts: 899
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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.
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Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878 |
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12-08-2020
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#8 | |
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Join Date: Jan 2004
Location: Portland, OR
Posts: 1,057
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Re: So... this was in my oil drain pan...
Quote:
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Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
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12-08-2020
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#9 |
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Join Date: Apr 2007
Location: Northern VA
Posts: 2,661
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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.
Sent from my iPhone using ZR-1 Net Registry
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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12-08-2020
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#10 |
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Join Date: Apr 2007
Location: Northern VA
Posts: 2,661
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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.
Sent from my iPhone using ZR-1 Net Registry
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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