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TIME-SERT J-42385-507BS Replacement Big Sert Insert M11x1.5mm 30mm

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In Stock
0.10 LBS
Calculated at Checkout
  • Big Sert Insert
  • Big Sert measurement on outside diameter (O.D.).
Frequently bought together:


Single TIME-SERT J-42385-507BS Northstar Over-Sized Big Sert Replacement Insert. 

DennisB The TIME-SERT Big Sert Oversize replacement insert is found in 11 x 1.5mm Big Sert thread repair kits. This is a common size head bolt thread repair insert used in several different TIME-SERT thread repair kits like the J-42385-500BS, 2200BS and 7111BS. 

*When installing BIG-SERT inserts do not back up the driver installation tool. Use a continuous right hand rotation of the installation driver tool. 

Outside diameter of this insert is 15.1mm. Used commonly when a previous competitive brand thread repair insert has failed. The Big Sert is held in with the expansion of cold rolling the bottom threads with the driver installation tool self locking it into place. The Big Sert also uses a tiny locking pin which is embedded in the lower threads further insuring that it will stay in it's installed position. The locking pin can be seen in the image above by mousing over for a magnified view.   

Notice our bulk discount prices on TIME-SERT replacement inserts for thread repair kits. Need more information on TIME-SERT thread repair kits? Visit our auto repair blog section on thread repair kits for tips, advice and all your thread repair questions answered. Just comment and we will be quick to respond.

See the pdficon-small.png TIME-SERT products pdf for more information on thread repair kits and inserts. Some are listed for certain applications on cars, trucks and motorcycles. The pdf is a partial application list so feel free to email or call if we can assist with your particular need. We also accept inquiries regarding our daily TIME-SERT specials. Remember TIME-SERT is recommended by leading car manufacturers like the General Motors Corporation. In fact TIME-SERT is GM's only authorized repair for head bolt threads.

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2 Reviews

  • 5
    block repair

    Used these oversize inserts to repair a Toyota 2azfe block that had previous repair sleeve break and pull out. Worked excellent saved from buying another motor. Used in conjunction with oversize dowel went from a nightmare to basic repair. Thanks to wise auto tools and denlors. ps I borrowed a northstar repair kit from a friend for the tooling to install.

  • 5
    Saved a rebuilt engine from the scrap

    I had ordered the complete kit, but had two inserts that didn't go all the way in like they should, well you cannot reuse these once installed, so I had to order two more and assure no metal shavings were left before installing the two new ones. Excited to report that the head has now been installed and properly torqued with no issues.

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