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<!-- google_ad_section_start -->Fiat punto 1.2 8v Spark Plugs<!-- google_ad_section_end -->
Fiat punto 1.2 8v Spark Plugs
Removing - cleaning - checking - refitting/Renewing
Published by Ziggy122
12-11-2012
Difficulty Level: 3

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Checking the Gap Setting



For the 8v
Ye olde Haynes to the rescue
NGK / Fiat Plugs are 0.9mm Gap
Bosch are 0.8mm
I believe Champion plugs are same as Bosch - but i have no reference to confirm that, so a little Google you must

Mine had some okay looking NGK plugs
So i need a 0.9mm gap
So Selecting a 0.5mm and 0.4mm i get 0.9mm from the feeler gauge
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place the feeler gauge between the point and hook on the spark plug - feeling for any resistance
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If there is none - the gap is too big
if its resistive, the gap is too small
You want to feel a slither of resistance, ie some resistance but still free to move

If you need to close the gap - then i normally push on a flat solid surface
to extend i bend the hook against itself, not easily done
Avoid making contact with the tip - if you break a tip or a hook - bin it - get a new one

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Old 12-11-2012   #1
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Re: Fiat punto 1.2 8v Spark Plugs

its a good idea to mark the ht leads if your going to remove them all at once so they don't get mixed up...


Also 25nm seems a little tight elearn for the gp and 500 shows 16nm :-)
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Old 12-11-2012   #2
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Re: Fiat punto 1.2 8v Spark Plugs

Quote Originally Posted by Andy Monty View Post
its a good idea to mark the ht leads if your going to remove them all at once so they don't get mixed up...


Also 25nm seems a little tight elearn for the gp and 500 shows 16nm :-)
There all different lengths - so its quiet easy to tell
plus the Coil pack holder is numbered too

Im my case once disconnected they dont move so its not to bad to mix em up

Also i've double checked
haynes defo says 25nm 18f/lb - they could have forwell got it wrong

Ziggy
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Old 14-11-2012   #3
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Thumbs up It's for 1,1 8V, but generally the same.

Important thing: BEFORE you remove old sparkplugs, clean area around them (there is perfect place for dirt to collect). If some dust/sand fall into combustion chamber, you are in trouble (possibility of grinding piston rings, scratching cylinder walls).
Clean it with brake cleaner and compressed air (or vacuum cleaner if don't have compressor).

Example of dirt in sparkplug hole/cavity (description not in english, but it's no matter).

Dirt also increases risk of cross-threading during installation plugs again. It also ruin down washer on sparkplug (will not seat and seal properly).

Tools needed for sparks replacement. Sparks types are for 1,1 engine on this picture, but rest is the same (16 mm socket, sparks have M14x1,25 thread, gap in brand new sparks is about 0,85 mm).


Last time i've changed my sparks, they were looking like this. Gaps was about 1,30-1,40 mm, and one of the sparks collected some black sludge (probably oil burning).


Condition of engine, can be judged by how spark looks like.

Translation:
a) normal wear
b) rich mixture (injector leak) or dirty air filter
below b) another example of normal wear on spark
c) burning oil (worn piston rings or valve seals/guides)
d) bad fuel quality (too much anti-knock agent additives)
e) normal wear, but went too far (it should be replaced long time ago)
f) bad combustion process (firing too quickly, or incorrect - too low - octane fuel)
g) too much non-flammable additives/contaminations in fuel (worn fuel filter).

While you installing spark plug, you should use some anti-seize grease, but just a little tiny drop on last few threads near washer (not around electrode).
If you are crazy and use too much (dip entire plug in can of grease) you are asking for trouble like this:

All torque specification charts are useless until they don't precise condition of the thread (new/used, perfectly clean and dry, oiled, rusted). Even brand new bolts/screws can be coated with some anti-corrosion agents acting like lube and mess up the tightening procedure.
If you installing used bolts, screws, spark plugs, whatever, threads are not in perfect condition. Using a bit of lube can help make it tight. Cleaning thread with wire brush is also good idea (clean it, but don't "grind" it, by pushing too hard, especially if you have strong made of steel wire brush, instead of brass one).
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Last edited by pmx007pl; 14-11-2012 at 17:29. Reason: More links added...
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Old 14-11-2012   #4
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Re: Fiat punto 1.2 8v Spark Plugs

The dirt in the plug hole is true

Im lucky mine isn't bad, but in places where is more muddy or water logging then yes - be full of ye old ****e

ziggy
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