Drill and tap question

[themechanic]

Does anyone make a drain petcock in M12 x 1.25 for my new aluminum radiator from Auto City Classic?

If not, can I drill and tap the M12 x 1.25 drain hole to the closest NPT for a brass drain petcock?

 

[Jeff Peterson]

What about adding this..


https://www.amazon.com/CDQBWKJGFJ-N...-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1

 

[69Bee]

I went to a website for the company you named above, looked at the one and only Mopar aluminum radiator and see in the pics that it already has the plastic drain plug. What is wrong with that and why do you want to change it?

 

[tonysrt]

Maybe plastic drain isn't acceptable in what he is doing.

 

[69Bee]

Neither is trying to drill and tap a larger hole in a bung that might not have enough meat in it. Plastic drain cocks have worked fine for decades... I did look at the other thread and saw that his radiator did not come with it as they clearly showed in the pics.

 

[ruffcut]

I have the same radiator and used a 3/8 NPT reducer and a 1/4 drain.

 

[themechanic]

I went to a website for the company you named above, looked at the one and only Mopar aluminum radiator and see in the pics that it already has the plastic drain plug. What is wrong with that and why do you want to change it?

Mine didn't ship with one. It's in the mail.

 

[themechanic]

I have the same radiator and used a 3/8 NPT reducer and a 1/4 drain.

What vehicle? I have very little room between the radiator and the factory strut rod threads.

 

[themechanic]

What about adding this..


https://www.amazon.com/CDQBWKJGFJ-NPT-Female-Metric-Adapter/dp/B0CPL81XMS/ref=sr_1_1_sspa?dib=eyJ2IjoiMSJ9.Hwc4YL6xXTNPyiSzPmPpmz6QhASvmMkY3KpK88zRnexPpwcX10X60JVdFhgdzqr7l8vh8Yevx7uwZCJK5oOEhJYUAW29wYrJKxq26Ze-lTGqkHaCItl7lI67i73vXXRGWvL7J_tqyEVWRtFxaOhcW7LksUfHB8EQrpZNI5PVxPkYeFBEz4brkUyze8_ZqgLXOq2Ub5h4S_JxczCVHglMO7ImnW3x40VW4osv8S-gR-g.rN-ZtHJ7xLKly6_gweaZfd-Q2IIuX-FiH7XzrR9iZYI&dib_tag=se&hvadid=604524928702&hvdev=c&hvexpln=0&hvlocphy=9021923&hvnetw=g&hvocijid=10680526945201154258--&hvqmt=e&hvrand=10680526945201154258&hvtargid=kwd-1708240287357&hydadcr=18873_13386220&keywords=m12+to+1/4+npt+adapter&mcid=0028cdef5196301681a1869f905d0b12&qid=1755697696&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1
View attachment 1904804

I don't have enough room to add the extra length between the radiator and the factory strut rod threads.

 

[themechanic]

I went to a website for the company you named above, looked at the one and only Mopar aluminum radiator and see in the pics that it already has the plastic drain plug. What is wrong with that and why do you want to change it?

1966-1972 Mopar B & E Body Big Block 361 / 383 / 426 / 440 26" Core A

Aluminum Radiator. Fits: 66-72 Mopar B & E Body

www.autocityclassic.com

No drain plug pictured.

 

[threewood]

I can't remember what size my brass petcock was that I used, but space was tight. One of the ears broke off so I replaced it with a brass plug.

 

[themechanic]

I'm going back to the factory radiator.

 

[WileE]

I'm going back to the factory radiator.

Bingo.