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Threaded holes
#1410279 Tue May 18 2021 12:57 AM
Joined: Jan 2013
Posts: 1,962
'Bolter
Gents,

For the life of me, I can't figure out what goes in each hole!

2 numbered pictures, 7 total threaded holes with colored arrows

One should be for an oil pressure gauge? In my before pictures there is nothing there.

Any help would be appreciated!

Chris

FYI engine is a 1961 261

Attached Files
171D6B19-C5EC-4C53-BEA5-AE0A192592E8.jpeg (227.95 KB, 156 downloads)
4D4AE13B-D99C-4C26-8635-44B78D381DC3.jpeg (197.51 KB, 153 downloads)
Last edited by ndkid275; Tue May 18 2021 01:05 AM.
Re: Threaded holes
ndkid275 #1410288 Tue May 18 2021 02:58 AM
Joined: Feb 2019
Posts: 1,859
P
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The holes in a triangular pattern on each side may be for side mounted motor mounts.


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Threaded holes
Phak1 #1410298 Tue May 18 2021 05:05 AM
Joined: Sep 2011
Posts: 894
B
'Bolter
Originally Posted by Phak1
The holes in a triangular pattern on each side may be for side mounted motor mounts.

That's correct.

Don't think the hole above the oil line with the green arrow is threaded, should be the oil flow pin. When driven in it's for the full flow oil filter. If pin is flush it's setup for bypass oil filter only If pin is driven in it must have external oil lines!


BC
1960 Chevy C10 driver 235 T5 3.73 dana 44
1949 GMC 250 project in waiting
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Re: Threaded holes
ndkid275 #1410301 Tue May 18 2021 11:09 AM
Joined: Jan 2013
Posts: 1,962
'Bolter
Ok, do if that is the case, where do I connect an oil pressure gauge?

Re: Threaded holes
ndkid275 #1410307 Tue May 18 2021 12:09 PM
Joined: Feb 2019
Posts: 1,859
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Place a tee in the oil supply. One side goes to the filter and the other side goes to the oil pressure gauge.

I added a second tee so I could add a second oil pressure gauge at the engine.

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D6718F5B-DE3B-459A-A838-8578BFFD3247.jpeg (126.84 KB, 104 downloads)
6D2BF9D2-1213-4102-A3E8-B00FAA21852E.jpeg (184.78 KB, 104 downloads)
Last edited by Phak1; Tue May 18 2021 12:11 PM.

Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Threaded holes
ndkid275 #1410311 Tue May 18 2021 12:48 PM
Joined: Jan 2001
Posts: 5,100
P
'Bolter
It looks like you have your filter lines bushed down to 3/8”. I don’t think that is going to supply enough oil for a full flow filter system. I believe that originally they used 1/2” tube.


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Re: Threaded holes
ndkid275 #1410415 Wed May 19 2021 02:07 AM
Joined: Jan 2013
Posts: 1,962
'Bolter
I'm am using original everything. I changed the one fitting back at the “in” to the filter.

Chris


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