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New Middletown, OH
quick n easiest way is to buy a small u/v die kit at your local auto parts store.you just pour in the dye where the oil goes n run the engine five minets or so then look for the dye with the u/v light n amber glasses.the dye will appear flourecent green where its leaking.others may suggest you spend the rest of your life washing the whole engine down to see the dye but thats not the case.most common place that vehichle leaks oil is the passenger side valve cover,very difficult to see if its leaking by the firewall unless you have an inspection mirror.
prolly just needs a resonator pipe.
no recommened interval,but 90,000 is common.
45 ft lbs on heads.26 ft lbs on cam bearing caps.22 ft lbs on lower intake.
spray water on it.if it quits squealing briefly then change the belt.
two types.woven flex pipe is about $75 per foot,which most likely is what you need.regular flex pipe is $10 per foot and wont pass emmisions.
a trailblazer has a 4.2 litre engine.whats your question friend?
like someone has turn what?
is that a coil on plug ignition? if so those boots carbon track easily. plus dont use copper core plugs,those cop coils burn up plugs asap.
put a coat hanger up the pipe.that will clean it.