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Old 03-07-2017, 11:39 AM   #19
Blown67
 
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Drives: 1967 Camaro, 2017 HBM ZL1
Join Date: Dec 2016
Location: Houston, Tx
Posts: 68
There's like a million posts on this apparently as I was told to use the search when I posted the same thing about mine a couple months ago. It's normal on the first start of the day or if the car completely cools down between drives. Mine does it every time, sounds just like mlee's video. That first hit is always the loudest and I usually forget that I'm in an apartment with the valves in track mode. Has to do with the high pressure pump being run off the cam, or so I've read from research.
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