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01-15-2023, 05:48 PM | #1 |
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Join Date: Dec 2007
Location: Dumas, Texas
Posts: 185
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Oil Pressure Sending Plug
Can someone please tell we what size the plug for the oil pressure sending unit next to the oil filter on a 69 350?
I took mine out, set it down and now I can't find the darn thing. Thanks |
01-15-2023, 07:07 PM | #2 |
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Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,190
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Re: Oil Pressure Sending Plug
The one behind the dist. is 1/8" pipe thread. The one by the oil filter on a big block is 1/4 pipe thread. I am not shure about that one on the small block. If you buy 1 of each you will have it covered.
George |
01-15-2023, 08:37 PM | #3 |
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Join Date: Dec 2007
Location: Dumas, Texas
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Re: Oil Pressure Sending Plug
I thought it was 1/4 not as well as, yet I cannot get a 1/4 not brass plug to start. I was able to take the original plug in and out with no problem, so I don't think it's a thread issue.
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01-18-2023, 01:04 PM | #4 |
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Join Date: Dec 2007
Location: Dumas, Texas
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Re: Oil Pressure Sending Plug
Can someone confirm this plug is a 1/4"-24npt plug?
I have tried for over an hour to get it in and I cannot. HELP. |
01-19-2023, 01:44 PM | #5 |
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Re: Oil Pressure Sending Plug
Are you sure its an oil pressure outlet? All the oil sending units on sbc i have worked on are mounted on top of the block behind the distributor. Could it be a boss for a brace or something? Try a 3/8 coarse thread bolt.
George |
01-19-2023, 10:17 PM | #6 |
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Re: Oil Pressure Sending Plug
If you mean the threaded hole adjacent to the top of the oil filter mount area it is not an oil pressure port...it is a mounting point for the bracket for the clutch pivot ball mount. I think from memory it is a 3/8 or 7/16 UNC thread....
The hole is marked with the X in the pic attached
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01-20-2023, 12:26 AM | #7 |
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Join Date: Dec 2007
Location: Dumas, Texas
Posts: 185
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Re: Oil Pressure Sending Plug
Thanks so much it's the on with the X.
What confused me is it had a plug in it with a allen head. |
01-23-2023, 12:04 AM | #8 |
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Location: Elkhart, Texas
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Re: Oil Pressure Sending Plug
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01-23-2023, 10:03 PM | #9 |
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Location: Brandon, Manitoba, Canada
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Re: Oil Pressure Sending Plug
Here's the oil pressure switch on my 1989 engine. I use it for a safety switch for my electric fuel pump. It turns off the pump if the engine dies. The engine was originally TBI equipped. The threaded hole seen here is the one marked with a blue X in Aussiein NC's post. The photo is actually sideways of course. Is the threaded hole for the clutch pivot if needed?
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Bob 1967 2wd Burb, 350/TH350, 3.73 posi Last edited by 67 Burb; 01-23-2023 at 10:10 PM. |
01-24-2023, 03:21 AM | #10 | |
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Location: Herculaneum MO (20 minutes south of St. Louis
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Re: Oil Pressure Sending Plug
Quote:
In the original photo there is no hole where you have the sender in the second photo.
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67 C10 283 T5 swapped longbed fleetside = wife's daily driver 67 C20 292 (originally a 250)4speed longbed fleetside w/original wooden bed=my project truck 67 C10 283+.060 (so a 292 as well)T5 swapped longbed fleetside=my DD 72 C1500 Sierra Grande 350 TH350 longbed fleetside=wife's fair weather truck Can you tell we are fans of longbed fleetsides & 67s Chris |
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01-28-2023, 06:32 PM | #11 | |
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Re: Oil Pressure Sending Plug
Quote:
As the OP posted a 69 350 engine, the threaded oil cut off switch hole should not be present.
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01-31-2023, 09:28 AM | #12 |
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Location: China Spring, TX
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Re: Oil Pressure Sending Plug
Here is my latter model 350 and you can see the oil P switch in the same position. Then there is the one on the rear of the intake drivers side (not my engine).
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