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02-21-2009, 02:59 PM #1
Need help with engine noise [video]
My buddies 04 GTO started doing this today. We're unsure what it's coming from... lifters, springs, rods, bearings??? It does this at idle and when rpms increase it gets faster. Warm or cold, doesn't matter. The car is in a parking lot and trying to figure it out to determine if we can fix it there or not.
Stock internal LS1, 55k miles. Camshaft: 232/236 FTI Custom Camshaft. .600 lift. Heads: Z06 #243 casting. These have the lightweight sodium-filled valves. Professionally installed Patriot Dual valvesprings.
Video:
Thanks!
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02-21-2009, 03:49 PM #2
- Join Date
- Oct 2007
- Location
- Beaver Dam KY
- Posts
- 7,745
79 T/A -91 Firebird- 1998 Trans Am -Oynx Black
I would definately have it towed home. That sounds rough as hell. Maybe pull that sides valve cover off and see it if there are any obvious things.
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02-21-2009, 05:13 PM #3
Something in the valve train would be my guess.
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02-22-2009, 05:31 PM #4
- Join Date
- Aug 2007
- Location
- Orlando
- Posts
- 19
White- 98 Camaro
I say bent pushrod.
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02-22-2009, 05:54 PM #5
Has he missed any shifts lately? DONT DRIVE the car anywhere. If hes missed some shifts its guna be a bent rod.
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02-22-2009, 05:56 PM #6
we definitely aren't running the car.
today we pulled the valve covers off. all the rockers seem to be working properly except the 2nd from back on passenger side. we checked a few pushrods (hardened 7.425 rods) and they looked fine. now I think we should figure out the PTV clearance..
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