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+--- Thread: Holy Cow why is my spark plug like this?!! (/showthread.php?tid=78717)
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Re: Holy Cow why is my spark plug like this?!! - darrsi - 01-09-17
I would still be inclined to put an additive through the fuel system to maybe clean some of the shite that has no doubt got in there somewhere.
Re: Holy Cow why is my spark plug like this?!! - Bretty - 02-09-17
There's only one thing for it. Give it a taste and report back if it is copper compound, rust or sh1t?
I'll beat if you look at the white ceramic bit of that plug you'll see its a discoloured rusty colour around the collar where it's corroded. that'll cause a voltage leak path creating your weak spark
Re: Holy Cow why is my spark plug like this?!! - darrsi - 02-09-17
(02-09-17, 12:15 AM)Bretty link Wrote: There's only one thing for it. Give it a taste and report back if it is copper compound, rust or sh1t?
I'll beat if you look at the white ceramic bit of that plug you'll see its a discoloured rusty colour around the collar where it's corroded. that'll cause a voltage leak path creating your weak spark
I'm going for Chicken Jalfrezi, had it earlier, the texture is uncanny :lol
Re: Holy Cow why is my spark plug like this?!! - motodevcam - 02-09-17
Ha ha thank you all
well, with new plugs in seems to ride a bit better with the new plugs. I don't own a torque wrench so I'll have to get one and get them in there properly. I'm assuming that a dodgy spark won't change the carb balancing? Or will I need to balance the carbs again?It's definatly rust, not copperslip or poo....or curry
Re: Holy Cow why is my spark plug like this?!! - darrsi - 02-09-17
(02-09-17, 09:49 AM)motodevcam link Wrote: Ha ha thank you all
It's definatly rust, not copperslip or poo....or curry
It would've affected the results i would've thought.
Not sure about a torque wrench on plugs because they have a crush washer. I prefer to just nip them up once i feel the washer is crushed, just make sure you're not too heavy handed or it will all end in tears.
Re: Holy Cow why is my spark plug like this?!! - Disorderlypunk - 02-09-17
never used a torque wrench on plugs - unless you are being a fool and swinging off a cheater bar you aint likely to overtighten them
Re: Holy Cow why is my spark plug like this?!! - Bretty - 02-09-17
I mean use a torque wrench to achieve the required torque. Not a high torque.
13Nm according to the manual.
You don't want them in too tight if subject to corrosion. It's not uncommon for a plug to shear off when you remove it, leaving the thread and ceramic stuck in the engine and then you really are foc'd.
I try and use a torque wrench as much as possible on everything since discovering how rubbish I am at judging torques..
Re: Holy Cow why is my spark plug like this?!! - slappy - 02-09-17
(02-09-17, 09:49 AM)motodevcam link Wrote: Ha ha thank you all
It's definatly rust, not copperslip or poo....or curry
How do you know for certain, have you licked it? :eek
Re: Holy Cow why is my spark plug like this?!! - darrsi - 02-09-17
(02-09-17, 01:41 PM)Bretty link Wrote: I mean use a torque wrench to achieve the required torque. Not a high torque.
13Nm according to the manual.
You don't want them in too tight if subject to corrosion. It's not uncommon for a plug to shear off when you remove it, leaving the thread and ceramic stuck in the engine and then you really are foc'd.
I try and use a torque wrench as much as possible on everything since discovering how rubbish I am at judging torques..
I use the torque wrench on most stuff, but things like brake caliper bolts for example i don't any more. I'm not heavy handed anyway because i deal with expensive and sensitive equipment at work, but you do get a general feel for what's right and wrong.
In the same breath a lot of people don't realise you shouldn't use copper grease with a torque wrench as it totally throws settings off and it will tighten way past the set level before it clicks, as i found out with a rear caliper pad pin a few years back.
If you use engine oil as a lube then torque settings will remain accurate though.