What are Time-serts?
Time-serts are thread repair inserts. Very similar to Heli-coils, but superior in design and strength. Time-serts feature a flange at the top to offer a positive stop and not allow the insert to thread down further than intended. They also expand into the hole as to not accidently spin out when a bolt is removed from the inset. Lastly, they do not have a pigtail at the bottom like a Heli-coil does, so a fastener can pass through and beyond a Time-sert insert.
These are excellent for repairing threads, but they are also great for offering a stronger threaded hole. In my case, I am Time-serting all of the exhaust manifold holes and all of the valve cover holes. I'm adding the inserts to gain strength and prevent future thread stripping, so I'm doing it as an upgrade not as a repair.
These aren't cheap by any means. They are about twice as expensive as Heli-coils. Whether they are worth the cost is up to you. The kits and replacement inserts can be found on Amazon.com among other places. The exhaust manifold studs are M8 x 1.25 and the valve cover is M6 x 1.0. See part numbers below:
M8x1.25 kit: 1812
M8x1.25x11.7 replacement insert: 18121
M8x1.25 tap guide: 38125
M6x1.0 kit: 1610
M6x1.0x9.4 replacement insert: 16101
M6x1.0 tap guide: 36105
Time-sert offers various length inserts. But the above lengths are what I found to be ideal for the exhaust manifold studs and the valve cover bolts.
Each kit contains a drill bit, counterbore cutter, a tap, a driver, and 5 steel inserts. (The pictured tap guide is sold seperately)
Time-serts are thread repair inserts. Very similar to Heli-coils, but superior in design and strength. Time-serts feature a flange at the top to offer a positive stop and not allow the insert to thread down further than intended. They also expand into the hole as to not accidently spin out when a bolt is removed from the inset. Lastly, they do not have a pigtail at the bottom like a Heli-coil does, so a fastener can pass through and beyond a Time-sert insert.
These are excellent for repairing threads, but they are also great for offering a stronger threaded hole. In my case, I am Time-serting all of the exhaust manifold holes and all of the valve cover holes. I'm adding the inserts to gain strength and prevent future thread stripping, so I'm doing it as an upgrade not as a repair.
These aren't cheap by any means. They are about twice as expensive as Heli-coils. Whether they are worth the cost is up to you. The kits and replacement inserts can be found on Amazon.com among other places. The exhaust manifold studs are M8 x 1.25 and the valve cover is M6 x 1.0. See part numbers below:
M8x1.25 kit: 1812
M8x1.25x11.7 replacement insert: 18121
M8x1.25 tap guide: 38125
M6x1.0 kit: 1610
M6x1.0x9.4 replacement insert: 16101
M6x1.0 tap guide: 36105
Time-sert offers various length inserts. But the above lengths are what I found to be ideal for the exhaust manifold studs and the valve cover bolts.
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Each kit contains a drill bit, counterbore cutter, a tap, a driver, and 5 steel inserts. (The pictured tap guide is sold seperately)
You must be logged in to view this image or video.
You must be logged in to view this image or video.
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