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Renault Forums :: Independent Renault forum
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8th February 2007
Join Date: Aug 2005
Nominated 2 Times in 3 Posts
TOTW/F/M Award(s): 3
Thanked 68 Times in 26 Posts
Originally Posted by
Yo Otto! Guten tag...
Could it be they have done away with the engine cover because they are fed up of paying for new ignition coils? I do believe that free circulation of air gives them a longer life. Do you agree or am I just blatherin'?
Yes, Vass I was thinking along those lines as well the hot cold aspect having an affect on the
packs as I believe some manufacturers have ducked air to the
packs, I asked in the Dealership ( two different dealers ) and they had not noticed the change. Tho the cover on my present Scenic II gets very dirty with road grime maybe the new front design on the latest models will alleviate that if not they are going to get very dirty thus attracting moisture mm , They have modified the dipstick it is now in front of the engine and at the top as prior models it was difficult to manually check the
level, My Scenic did not require topping up with
between services but I still liked to check prior to long journeys and when I did my weekly checks. With the layout on the V6 engine I would imagine you would get a considerable heat/ Hot spots built up as most problems with the
packs seem to show up just after starting would I be right in saying, I have never had any problems with the
on my Scenic II, Tho I have heard of people who have.
Better close my posts are getting as long as yours Vass
An ignition coil (also called a spark coil) is an induction coil in an automobile's ignition system which transforms a storage battery's 12 volts to the thousands of volts needed to spark the spark plugs.
This specific form of the autotransformer, together with the contact breaker, converts low voltage from a battery into the high voltage required by spark plugs in an internal combustion engine.
In older vehicles a single (large) coil would serve all the spark plugs via the ignition distributor.
In modern systems, the distributor is omitted and ignition is instead electronically controlled. Much smaller coils are used with one coil for each spark plug or one coil serving two spark plugs (so two coils in a four-cylinder car). These coils may be remote-mounted or they may be placed on top of the spark plug (coil-on-plug or Direct Ignition). Where one coil serves two spark plugs (in two cylinders), it is through the "wasted spark" system. In this arrangement the coil generates two sparks per cycle to both the cylinders. The fuel in the cylinder that is nearing the end of its compression stroke is ignited, whereas the spark in its companion that is nearing the end of its exhaust stroke has no effect. The wasted spark system is more reliable than a single coil system with a distributor and cheaper than coil-on-plug.
Where the coils are remote mounted they may all be contained in a single moulded block with multiple high-tension terminals. This is commonly called a coil-pack.
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