What is the side effect if spark plug too hot

[Tohto]

Need some advise here.

Bought a set of spark plug and may had got the wrong heat range, what is the side effect if the spark plug I used was too hot.

[Hamburger]

centre electrode will disintegrate n cost misfiring. Not worth e try esp running on NSW

Edited September 14, 2009 by Hamburger

[Freifeit]

Need some advise here.

Bought a set of spark plug and may had got the wrong heat range, what is the side effect if the spark plug I used was too hot.

 

It may cause detonation (engine knocking), i.e. the air/fuel mixtures ignites before the spark plug fires cause by hot spark plug..

 

just my 2cts.

[Trex101]

Depends on how hot or wrong spec you bought.

 

Most cars can run between a certain heat range base mostly on driving condition, for example, if your car call for BKR6E-11 and you bought BKR5E-11(1 heat range hotter), it will still be fine and in fact provide better combustion cleanliness if it's mostly city driving but might cause detonation/pinging under heavy load or high speed driving. If you drive like crazy and rev the hell out of your motor then BKR7E-11 which is 1 grade colder would also be suitable.

 

So, it all depends mostly on your driving condition and application, there's no 1 size fit all plugs, just the most suitable in that condition .

[Godfinger]

Hi Trek, may I side track abit, do you happen to had any link

that provide a Cross-Ref table on all the plugs Part number.

I tried to search in the resource folder but could not return

any results.

Thanks.

 

[Trex101]

Hi Trek, may I side track abit, do you happen to had any link

that provide a Cross-Ref table on all the plugs Part number.

I tried to search in the resource folder but could not return

any results.

Thanks.

 

There's no x-ref link but what part number are you trying to cross? Just post it here, maybe i can help.

 

[Genie47]

You can get away if you gap them smaller.

 

So if the plugs use 1.1mm, push down to 0.9mm. You will not have a lot of power but the plugs will last longer and won't blow themselves to smithereens.

[Windchoco]

Hi, how to tell if your spark plug is due for change ? Will feel anything during driving or FC will drop?

 

Asking bcos my service manual is all "inspect" only, dun have "replace" at any servicing interval

[Yeobh]

Just google and all the infos will be in front of you in no time.

[Darkblue]

Rule of thumb is

 

Copper -> 20K change

 

Rest I not sure, because I don't use fancy spark plugs.. if ain't broke don't fix it, I use back Copper plugs

[Trex101]

Rule of thumb is

 

Copper -> 20K change

 

Rest I not sure, because I don't use fancy spark plugs.. if ain't broke don't fix it, I use back Copper plugs

 

It also depends on how demanding is your ignition system. Like for my car which is dual fuel, i need fine wire plugs for it's lower voltage advantage to create sparks, if not the demand on the ignition system would be too high and might fried or shorten the ignition coil. Even with fine wire plugs, we still have to gap the plugs smaller(~0.2-0.3mm) for ignition coil longevity.

 

[Yeochris]

just a Qs about spark plug... if my ride fuel too rich... how does the plug look like at the tip?

[Tigershark1976]

just a Qs about spark plug... if my ride fuel too rich... how does the plug look like at the tip?

 

 

black and sometimes, wet looking...

[Tigershark1976]

Hi, how to tell if your spark plug is due for change ? Will feel anything during driving or FC will drop?

 

Asking bcos my service manual is all "inspect" only, dun have "replace" at any servicing interval

 

 

one of the sign is the the gap of the sparkplug... that is also why if you know how to do regaping of sparkplug, most sparkplug can last u very very long...

Edited September 17, 2009 by Tigershark1976