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Join Date: Mar 2009
Posts: 1,780
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oil hole thread size question
Working on a 79 3.0. The threads on the tapped hole on the right side case that feed the oil pressure transducer, cam, and tensioner are damaged. I will need to chase the threads with a properly sized tap. Can anyone tell me the thread size to order? I tried various gauges that I have and it seems it could be something like 12x1.0
Thanks in advance for your help! |
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10-08-2023, 09:28 AM
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Thru-bolt……..
Were you referring to this one? The thru-bolt is M12 x 1.0.
 Tony |
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10-08-2023, 03:24 PM
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Join Date: Sep 2007
Location: Boston, MA
Posts: 1,465
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Hopefully it's just the threads, and the case wasn't cracked when someone tried to remove the oil pressure transducer on the car.
Mark
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1979 911SC Targa |
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10-08-2023, 09:50 PM
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Yes-thats it. Thank you Tony!
A set of taps are inbound. |
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10-10-2023, 03:01 AM
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It's a 914 ...
Join Date: Jan 2008
Location: Ossining, NY
Posts: 4,712
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You might be better off with a thread chaser. Or at least make sure you get an "end tap" that has the shorter tapered section. The long taper on a regular tap might render it of limited usefulness in fixing your threads.
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10-10-2023, 03:45 AM
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Actually I ordered a pair- 1 tapered and 1 bottoming
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10-10-2023, 07:00 AM
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Registered
Join Date: Jul 2003
Location: Glorious Pac NW
Posts: 4,184
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Quote:
A tap is sharp/hard and intended to cut & remove metal - to put a thread where there wasn't one. Thread chaser is softer & designed to roll/reform the metal that's there to the correct profile without removing any.
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'77 S with '78 930 power and a few other things. |
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10-11-2023, 09:18 AM
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