What size is the freeze plug

Tiny
SHADOWFIREOMEGA
  • MEMBER
  • 2006 NISSAN SENTRA
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Cannot find this anywhere in the owner manual or via a quick search online. It's one of the center ones so expansion plugs won't work (really friggin shallow in there) so we are going with steel, but 1-1/4 is just too big, and 1-1/8 is much too small. I think it may be a 31mm, but don't have an accurate way to measure it. Bonus question, where the heck do you even get metric size freeze plugs?
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Monday, August 12th, 2019 AT 5:32 PM

3 Replies

Tiny
DANNY L
  • EXPERT
Hello, I'm Danny.

Do you have access to a micrometer? Quick math shows 1-1/4 equals 31.75mm and 1-1/4 equals 28.575mm I believe Napa auto parts sells metric freeze plugs. Hope this helps and thanks for using 2CarPros.

Danny-
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Monday, August 12th, 2019 AT 6:21 PM
Tiny
SHADOWFIREOMEGA
  • MEMBER
Found out it was a 30mm, visited a machine shop where the mechanic/machinist was working on an identical engine!
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Wednesday, August 14th, 2019 AT 3:24 PM
Tiny
DANNY L
  • EXPERT
Good news ! Thanks again for using 2CarPros,
Danny-
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Wednesday, August 14th, 2019 AT 4:26 PM

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