🔧 Fix it right, fix it once — the pro’s oversized spark plug insert!
The Big-SERT M14x1.25x16.8mm Taper Seat Insert by Time-Sert is a premium oversized spark plug repair solution designed for heavy-duty truck applications. Featuring a zinc-coated copper core and precision M14x1.25 threading, it restores damaged coil threads with a durable 16.8mm taper seat insert. Sold in pairs, it requires the Time-Sert installation kit (5141S or 5141E) to ensure a professional, long-lasting repair.
| Brand | TIME-SERT |
| Core Material | Copper |
| Gap Size | 1.25 Millimeters |
| Thread Size | 14 |
| Vehicle Service Type | Truck |
| UPC | 845617006539 |
| Manufacturer | Time-Sert® |
| Part Number | 51457 |
| Item Weight | 4.2 ounces |
| Product Dimensions | 1.5 x 1.5 x 1.5 inches |
| Item model number | 51457 |
| Is Discontinued By Manufacturer | No |
| Material | Zinc Coated |
| Item Package Quantity | 2 |
| Batteries Included? | No |
| Batteries Required? | No |
8**E
Expensive (especially the install kits) but permanent repair
These work great. They create a new thread where the original has been damaged. Especially good for spark plug thread repair. The installation kits are very expensive but cheaper than paying someone to replace the head (or to do it yourself on many cars). Most jobs can be done with the head in place.
B**N
Best must have for your shop
I will never use the standard oversize again this is so much better and I have fixes three where the single oversize blew out saved a head each time
D**L
Easy to use and add the thread lock
easy to use worked great on my project thank you
B**Y
Shade tree Or ?
This product worked perfect. The only reason I don't give it five stars is the cost of buying the installation kit to in stall it. But between me and you I didn't buy the kit. I purchased a tap for $4, loc-tite and used the save a thread tap from the save a thread kit that DIDN'T WORK to set the big-sert. (or use a long bolt with the same inner thread) Seems to have worked in my 3100 engine.
A**R
did its job, make sure threads are tapped until ...
did its job, make sure threads are tapped until tap can be turned by hand to insure insert will install full depth to shoulder.
C**S
Five Stars
Excellent ford crash kit. Can easily fix and repair the engine right on the side of the road
A**Y
Fits 2.8 30v audi
Worked perfect on 1999 audi 2.8 30v engine.
M**.
Both fast and easy.
Worked Perfectly. Both fast and easy.
Trustpilot
2 weeks ago
1 day ago
