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03-26-2017, 02:36 PM
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#6 |
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VIP Member
Join Date: Jun 2006
Posts: 3,416
Likes: 522
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Re: 5.3 LS Top End Noise
GM had a bulletin # PIP4499B regarding lifters also u might check oil pump O ring over time (yours is old 248K and 10 years) they get hard and do not seal properly allowing air to pass thru the system and causing intermittent oil pressure very common in 5.3 engines
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