302 Z28 oilsending unit thread

firez · #1 08-05-2008, 06:41 AM

Thanks for the help,it seems a 3/8 NF 24 is very close also.

TDW · #2 08-05-2008, 03:41 PM

[ QUOTE ]
Thanks for the help,it seems a 3/8 NF 24 is very close also.

[/ QUOTE ]

Whatever you do, do not use the 3/8" tap. It will destroy the taper in the hole.

firez · #3 08-05-2008, 04:57 PM

Thanks for that help but I think that is what has been done already before I bought the car. Do you know if a heli-coil will work to fix this problem?

TDW · #4 08-05-2008, 05:37 PM

I have never heard of a heli-coil for a pipe thread. I would check the auto-parts store for a straight adapter that is 3/8"-24x 1/8" NPT. There are fittings like that in the brake tubing/fitting cabinets around here.

firez · #5 08-05-2008, 07:42 PM

I found a local machine shop that will make me up a adapter that will work with the problem I have encountered. Thanks Tony

PaulK · #6 10-28-2008, 09:07 PM

FYI - Future reference
They DO make a 1/8 NPT helicoil. McMaster Carr #91733A401 with tap #91711A251. Also 1/8 NPT is 27 TPI.

TDW · #7 10-29-2008, 03:49 AM

Thanks Paul. I stand corrected then.

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