glow plugs

[nitro83857]

hi
i just bought some new glow plugs and they seem a littl longer than the one that i got when i bought the car. Could this cause my car not to fire?

 

[Diver6127]

It can hit your piston if that type of plug is not specified for that engine. What engine are you running?

 

[nitro83857]

It is a .18 engine

 

[Diver6127]

OS 18? Sirio 18? HPI 18? which one ... For the OS and Sirio, standard length plugs are the norm.

 

[rbmaxxbasher]

What brand/type glow plug did you buy?

FYI: I recommend the O.S. Glow Plugs.... Also if it's an .18 I'd recommend an A5 plug.

Seems you may have purchased a plug for a plane/heli engine.

 

[rocknbil]

It can hit your piston if that type of plug is not specified for that engine.

Sorry man but this can never happen, even if you remove the shims. BUT it will cause a slight increase in compression if your engine normally uses short plugs.

 

[rbmaxxbasher]

Sorry man but this can never happen, even if you remove the shims. BUT it will cause a slight increase in compression if your engine normally uses short plugs.

In some engines it IS possible for it to happen. For instance a trx 2.5 engine, with a airplane plug, it would hit. I know because NeoGeo202 tried to put one in his O.S. CV-X .12

 

[rocknbil]

The August 2004 issue of RCCA, page 226, appropriately titled "Myth Busters," says it better than I ever could:

" . . . the difference between a long plug and a short one is merely one thread. A standard plug's size is 1/4-32; this means that a longer plug's extra thread makes it 1/32 inch (about 0.8mm) longer. . . . . a typical combustion chamber is 4 to 6mm deep, and a long plug is only 0.8 mm longer. Getting these two components to contact each other would be quite a trick!"

 

[Nitrobuzzard]

There are some plugs that have idle bars, these plugs are used for aircraft but maybe you got one of these type plugs?? just my thoughts.............