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Old 01-03-2018, 12:11 PM   #4
BR3W CITY
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Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
Re: 06 5.3 Loud tick Lifter?

The DOD system has an oil relief, so the momentary loss of oil pressure is a symptom of that. I'd doublecheck that you don't also have cracked exhaust studs on the rear 2 cylinders (very common for ticking noises). But the DOD system is the likely candidate.
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