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Difference between Denso K16 R-U and Denso K16 R-U11

Discussion in '1st Gen. Tacomas (1995-2004)' started by Old n' slow, Oct 30, 2020.

  1. Oct 30, 2020 at 1:09 PM
    #1
    Old n' slow

    #1
    Old n' slow [OP] Well-Known Member

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    Oak Island, N.C.
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    2000 Tacoma 2.4 5 speed flare side
    I mistakenly used K16 R-U plugs (@ .031 gap ) instead of K16 R-U11 ( @ .043 gap) for the last 30,000 miles. The engine ran great.

    Just wondering what’s the difference besides the gap setting ?

    ( I didn’t realize my 2000 east coast sold Tacoma was a LEV California model )
     
    Old n' slow, Oct 30, 2020
    #1
  2. Oct 30, 2020 at 2:03 PM
    #2
    Wyoming09

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    Wyoming09 Well-Known Member

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    Different heat range would be my guess Compare the threaded sections I venture one is longer then the other.
     
    Wyoming09, Oct 30, 2020
    #2
  3. Oct 31, 2020 at 8:29 AM
    #3
    khail19

    #3
    khail19 Well-Known Member

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    Last number is just what the plug comes pre-gapped at. 11 is 1.1mm or 0.044", here is a chart that shows what the part numbers mean.

    upload_2020-10-31_8-29-10.jpg
     
    khail19, Oct 31, 2020
    #3
    Old n' slow[OP], Jeff Lange and Hitstick like this.
  4. Nov 1, 2020 at 7:55 PM
    #4
    Jeff Lange

    #4
    Jeff Lange Well-Known Member

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    Calgary, Canada
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    '86 AE86, '05 NCP13, '11 GSE21
    Same plugs, different gaps.

    Jeff
     
    Jeff Lange, Nov 1, 2020
    #4
    Old n' slow[OP] likes this.

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