l - NGK Spark Plugs UK

Melted Heater Tube
Heating Coil Broken
∞ Resistance
Broken Heater Tube
Shiny appearance on
heater tube
Swirl marks on heater
tube
Carbon build up at
taper seat area
110
INTERPRETATION OF GLOW PLUG APPEARANCE
Appearance Causes Recommended Counter Measure
1. Abnormal Overheating
a) Incorrect fuel injection timing or volume
flow rate.
b) Abnormal combustion due to excessive
lubricating oil entering the combustion
chamber.
2. Excessive Voltage
a) Incorrect glow plug has been fitted.
b) Faulty controller relay or glow plugs
switched on too long.
a) See excessive voltage above.
b) See carbon build up below.
Excessive turbulence or overheating due to
incorrect fuel injection timing or volume flow
rate.
Build up of carbon surrounding glow plug
heater tube in combustion chamber.
a) Check fuel injection.
GLOW PLUG INTERCHANGE CHART
b) Check valve guides and piston rings.
a) Confirm glow plug part number is correct.
b) Check controller relay operation.
Check fuel injection timing and volume
flow rate.
Ream excessive carbon from glow plug hole
prior to fitment.
Part No. Stock code Interchange Part No. Stock code Interchange Part No. Stock code Interchange Part No. Stock code
Y-103 # # # x Y-103-1 # # # x Y-103-2 2926 x Y-103V 2031
Y-106 # # # Ö Y-106-1 6525 x Y-106V 6926
Y-107 # # # Ö Y-107-1 # # # x Y-107V 6628 x Y-107R 1229
Y-112M # # # Õ Y-112M1 2531
Y-112R # # # Õ Y-112R1 1032
Y-115R # # # Ö Y-115R1 2161
Y-115T # # # Ö Y-115T1 2189
Y-118T # # # Ö Y-118T1 2951
Y-128 # # # x Y-128T 7227
Y-162R # # # Õ Y-162R1 2431
Y-178 # # # x Y-178T 3030
Y-182T1 # # # x Y-182T 2163
Y-203 2532 x Y-203V 7728 x Y-203VS # # #
Y-204TS # # # Ö Y-204TS1 3829 x Y-204SS 7629 x Y-204RS 4573
Y-302 2100 x Obsolete
Y-701R 7464 Õ Y-701RS 2765 x Y-701U # # #
Y-720U # # # Õ Y-720U1 5392
Items marked # # # have never been stocked by NGK UK, therefore have no stock number