BIG-SERT® OVERSIZED SPARK PLUG THREAD REPAIR KIT M14x1.25

” OVERSIZED HOLES” For Spark plugs that have been previously repaired.

The stripped hole should not be larger than 16.8mm or .660 inches.

Note: Kits 5141S & 5141E can install any insert length in the columns to the right. Washer seat or taper seat

Spark plug thread repair kit P/n 5141S

5141S-short

5141S DOES NOT INCLUDE INSERTS

BIG-SERT SPARK PLUG KITS

KIT PART NO.

INSERTS

KITS

P/N

LENGTH

INCHES       METRIC

WASHER SEAT P/N

TAPER SEAT P/N

M14x1.25
Short Version
p/n 5141S
does not include inserts.
——————————-
M14x1.25
Extended Version
p/n 5141E
does not include inserts.
Used in recessed holes 6″ inches/152mm or deeper.

P/n 5141Samazon-smaller-button
Insert Not included

———–

P/n 5141E
amazon-smaller-button

Insert Not included

.370       9.4mm

.430          11mm

.600          15mm

.660      16.8mm

.905         20mm

.965       24.5mm

4010351401

51403

51405

4010351407

51409

——-

51453

4010351455

4010351457

——-

51469

KITS THAT INCLUDE INSERTS

QTY.

LENGTH

INCHES       METRIC

INSERT PART NO.

Short
Version
 
5141S-457  amazon-smaller-button
Short
Version
8 inserts included
______________
Extended

Version
 


Extended
Version
8 inserts included

INCLUDES 8 INSERTS

5141S-457-layout1sm

INVISIBLE TXT

1—>

2—>

1—>

INVISIBLE TXT

1 —>

2—>

1—>

Inches  Metric

.370     9.4mm

.660    16.8mm

.905     23.mm

Total 8 inserts included

.430     11mm

.660     16.8mm

.965     24.5mm

WASHER SEAT P/N

51401

51407

51409

TAPER SEAT P/N

51453

51457

51459

M14x1.25 Inserts are also available in aluminum click here: normally used in racing applications,
where Nitromethane is used as a fuel. Steel inserts typically have a higher tensile strength than aluminum.

Ford spark plug kit

KIT PART NO.

LENGTH

INCHES       METRIC

STYLE

TAPER SEAT P/N

.660     16.8mm

Triton Style

p/n 5554

.660     16.8mm

Z-tech style

51460

Using Ford kit p/n 5553 to repair other vehicles / inserts. click here:51484aSM

TRIPLE OVERSIZED SPARK PLUG REPAIR KIT M14x1.25

Repairs holes from 17mm to 18.5mm or (.670 inches) to (.730 inches)
( not recommended for virgin holes. ) use 5553 kit above


STAND ALONE OVERSIZED REDUCER TO M14x1.25″ For 3/4 Taper Sparkplug’s
LAST CHANCE REPAIR FOR THE FORD 4.6 / 5.4 heads.
All the tools are included to repair the spark plug hole.
The kit will repair holes as large as .730 inches by installing a special oversized insert
that will accept our 3/4 reach TAPER SEAT M14x1.25 BIG-SERT insert 51457.

M14x1.25
REDUCER
FORD HEADS

KIT PART NO.

LENGTH

INCHES       METRIC

STYLE

Instructions

5600

Kit includes 5 inserts each of the double and triple oversized

 

.550     16.8mm

REDUCER

Repairs holes from 17mm to 18.5mm or (.670 inches) to (.730 inches)
( not recommended for virgin holes. ) use p/n 5553 kit

ADD ON KIT: FORD TRIPLE OVERSIZED REDUCER TO M14x1.25 TAPER SEAT ”
:ADD ON KIT: LAST CHANCE REPAIR FOR THE FORD 4.6 / 5.4 heads.
This is a special kit that “is used in conjunction” with the p/n 5553 or 5141E.
You must have 1 of these kits above to finish this repair.


The kit will repair holes as large as .730 inches by installing a special oversized insert
that will accept our 3/4 reach M14x1.25 BIG-SERT inserts p/n 51459, 51407 or 51457.


M14x1.25
REDUCER
FORD HEADS

KIT PART NO.

LENGTH

INCHES       METRIC

STYLE

Instructions

triple

Kit includes 5 triple oversized inserts.
Note: double oversized inserts not included Fords use insert p/n 51459

.590     15mm

REDUCER

We can now repair holes as large as .730 inches by installing an insert inside an insert.