sbd16v

as above

St3V3_C

When? One or all?

Deep holes to put the plugs in? I've seen people drop the plugs and let them just fall into the hole, could it be that?

sbd16v

no mate i done several hundered miles including totb without taking them out but last nigt it went on 3 cylinders and when i pulled the plug out it was closed up i dont even know its possible for the plug to hit the piston without hitting the head but it seams t might be

Anonymous

I have no idea how it happened.

As i said on the phone most reasonable theory ive hear so far is a bent gudegeon pin.

But i must admit i dont think thats likely knowing how thick your pin is!

Turbosystems

iTrader: (5)

high electorde tip /cylinder temperature ie plug electrode is glowing,and cylinder pressure squashed it for u ,smells good to me lol

Anonymous

TS, funnily enough that was one of the theories i put forward myself to Rob on the phone last night, especially given the cylinder pressures in this particular engine are massive, but then i discounted it on the basis that why would it just do that one plug in, but i guess a slightly lower flow rate on that injector or something could push it over the edge, plus that cylinder does tend to get a little hotter than the others due to the poor design of the exhaust manifold on this engine.

Thanks for the input

Stu @ M Developments

iTrader: (12)

I concur with Tea Bag Systems

Anonymous

Stu, its the same cylinder that dropped the ceramic over the electrode on the plug as well, so the plugs are defintely taking a hammering on that cylinder!

Thicker headgasket would cure it if you want a temporary measure that doesnt involve new chips or anything Rob.

sbd16v

i am really thinking injector now might give mike h a ring some must have a spare one down here i am ging t check in a min but i think it closed it up a little last nigh again

i was thinking about it earlyer chip and is it even physicalypossible for the piston to hit the plug without hitting the head ?????

Anonymous

Rob, the vuaxhall standard pistons have a raised centre on them on the calibra turbo, but even still i think probably not realistically, it certainly would NOT be possible without one hell of a lot of noise coming from somewhere!

You could try swapping injectors from one cylinder to the next and see if the problem moves with them, but i suspect it may not.

sbd16v

if it does not move with the injector what else could it be lets rebember the first time this happened and it was with a different head and a diff head gasket before anyway damage was done i am lost ijectros must seam highest possiblity

Anonymous

Rob, my belief is that the extra heat in that cylinder is due to the location of the turbo relative to it on th manifold, rather than due to that cylinder running leaner than others, if moving the injector doesnt move the problem, then it would indicate im probably correct.

Anonymous

PS

I do NOT think its a fualty head gasket, but a thicker one would lower the pressure involved and should also lower the temp sligthly as well.

So if the lads (stu and ts) are correct on the cause being heat/pressure (only a fool would bet against that pair!), it would solve the problem.

Anonymous

PPS

that manifold i have (200sx one) would sort the problem if im correct also, as it would remove the extra heat from that cylinder by holding the turbo further from it.

sbd16v

check pm on mig



why do thinks always come at the same time and mount up

Stu @ M Developments

iTrader: (12)

Are you running the correct heat range?

NGK numbering you want to be in an 8 or 9

Champion a 7 - 9

Denso around the 27 - 31

sbd16v

my ngk's are 2 grades colder than stanard i think they are a 9

big_wig_074

i had this on me old saff when running c57s,swapped to c59s and never happened again!dunno why or how but thats what i did!

sbd16v

so it actualy made te two electoreds(SP)touch

digita1dragon

same thing happened on my old XR2 engine I just assumed it was running lean somehow. Super 4's were my favourite method of keeping that baby sparking

big_wig_074

the gaps had to be checked and adjusted VERY regularly on mine!like ever day or two!

Fiecos Dan

seems your meltin the plug,

done it twice wen my xr2 run lean due to a fuel pump problem.

Turbosystems

iTrader: (5)

.


Now the ceramic breaking off smells like det to me

sbd16v

the ceramic broke off and kind of fell down covering the electrode so to speak

could bad fuel of caused this problem as the day before i had the gap close up i had to fill up at an esso garage with no super unleaded and forgot to fill up again it was only tonight when i stopped at the shell garage and thought ummm that 20 quid lasted a while i rememberd it was standard fuel (i was on gas when this happened last night where talking close to 400bhp )

Stu @ M Developments

iTrader: (12)

Erm...... YES!!

heeman10

Must be easily done though...

Anonymous

PMSL @ normal unleaded in it when on gas and at full boost, you're a bloody danger to yourself sometimes Rob, if you have to put basic fuel in it then keep her off boost till you can fill up with decent fuel again!

Turbosystems

iTrader: (5)

it is false economy to run cheap fuel

Anonymous

I dont think he was doing it for economy reasons somehow mate!

GARETH T

i dont think he ment "economy " in the mpg sense of the word mate

Turbosystems

iTrader: (5)

no gareth your right I didn't.The number of customers we have had over the years that have run their 400 +bhp cossies on 95 ron cos of the price is unreal ,as they shell out 4k to rebuild it.Usual excuses are well it ran fine on it ,usual reply well it doesn't now .roflol

Anonymous

LMAO

A fool and his money eh?

Turbosystems

iTrader: (5)

a fool with no money now more like lol

Turbosystems

iTrader: (5)

95 ron fuel is mean't for your lawn mower ,if you put it in your cossie it will soon sound like your lawn mower too

sbd16v

i did not put that fuel in by choice try finding a petrol station that has super at 1 in the morning in cornwall !!!!! and was going to fill it up the next day but you know what my memory is like chip

oh well will go put another standard plug in it for now as the only other decent ones i have are in the alfa glove box chip or can i try and regap the ngk one

Anonymous

Depends on how your cossie is mapped, no reason really that you cant run around at 300bhp on normal unleaded fuel without an issue if the timing is taken back a few degrees on a normal "stage 3" sort of chip.