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if it were me, i'd take a junk of heater hose, put it to my ear and listen to exactly where it was coming from. good luck

 

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seafoam through brake booster? i' m missing something here. i bought a bottle yesterday and according to the instructions, my best bet was to pour it in the gas tank. originally i thought it got sucked through the pcv valve. but the parts fella' said that wasn't a good idea. I dunno. maybe that's why i still have my hesitation...........interesting. does the mystery tick seem to go away once all warmed up?

 

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depending on the condition of your oil, i'd guess manifold leak

 

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leak

Check for broken studs, that's what my issue was, and I had to have the manifolds replained.

Good luck