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07-31-2020, 09:42 PM
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#1 |
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Senior Member
 
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,791
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L31 Vortec Ports
It's been a while since I tore this engine down, and I can't remember what went here. These look like they're perhaps ports in the oil galley, but I'm not sure. If so, what size plug do they take? I tried 1/4 NPT and it's too large, but they're much larger than 1/8th.
Thanks.
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I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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07-31-2020, 10:50 PM
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#2 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: L31 Vortec Ports
Those are clutch Z-Bar Pivot mounting holes, No need to plug them. You have the one oil pressure port plugged above the oil filter.
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07-31-2020, 10:59 PM
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#3 |
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60-66 Nut
 Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: L31 Vortec Ports
The threads should be 1/2"-13 bolt threads for the ballstud for the clutch bellcrank. Which hole to use depends on the chassis being installed into.
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07-31-2020, 11:28 PM
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#4 |
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Senior Member
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,791
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Re: L31 Vortec Ports
Makes sense - the block came out of a manual transmission truck. I have a TH350, so I'll just leave them alone.
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I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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08-02-2020, 05:41 PM
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#5 |
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Registered User
Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,629
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Re: L31 Vortec Ports
On another note it looks as if you have your cooling system grounded? Inquiring minds want to know.
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08-02-2020, 07:20 PM
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#6 |
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Senior Member
Join Date: Jan 2011
Location: Hayes Va
Posts: 4,569
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Re: L31 Vortec Ports
Looks like a block heater.
Jimmy
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08-02-2020, 08:34 PM
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#7 |
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Senior Member
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,791
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Re: L31 Vortec Ports
It's a block heater. I'm getting old and I hate being cold...
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I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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08-04-2020, 10:01 AM
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#8 |
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Registered User
Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
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Re: L31 Vortec Ports
Smart
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