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hole in cylinder head utility??

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hi guy ^^
someone know what it this hole ?

many thanks
 
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way2fastforu

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most likely coolant...is there any kind of pipe runnin of your inlet mani wen its coverin that hole??follow the pipe back to the other end if there is an ul prob figure out wat its for.
 
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that would be for the coolent going into your intake manifold, oem water temp sensors are also on your manifold.
it also feeds water to you throttle body. when engine start up from cold your TB is lifted slightly to help with cold start, as the water warms up the wax in the TB melts and brings the revs down abit.
 
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