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Old Aug 8, 2024 | 02:15 PM
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Default 02 corvette question

So it’s been at the shop for a while everything checks out according to them. Take it home everything’s fine still have the 20psi oil pressure but I’ve been noticing a slight few changes in how the chop sounds I have 2 videos one from may 2024 and one taken August of 2024, cam just sounds entirely different and almost vaccum leak related but everything’s been checked for vaccum leaks and my PCV is solid. Compressions came up the same have metal in my oil still and I’m probably 1000 miles in changed my oil a total of 4 times in this time period. Idk if this is bearing material it’s not like a lot of comes up find it’s just on the plug not the oil. out of options the shop says the motor is fine it’s quiet. I think I’m burning oil though but I don’t know how, sometimes oil level light comes on and it freaks me out but when it’s check it looks of be full( or at least a little lower) dip stick is kind of I guess not reading right with fresh oil on it until it gets darker. But anyway I’m debating on dropping it off at my tuners this time around to do a full diag on the car I’m just really praying the oil pressure is isn’t bearing material related because it’s getting to the point where it’s really freaking me out. Anyways here’s the two videos. Video in daylight is from may of 2024, video in dark was pretty much last night cam doesn’t sound cammy. The plugs had some oil on it too haven’t checked it since I last cleaned them up a bit idk where it’s coming from truthfully
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Old Aug 8, 2024 | 03:02 PM
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20 lbs sounds low. Is this just on the gauge, or did you also check the DIC?

Did the problems coincide with the cam installation?

Oil on the plug also indicates failing valve seals.

Have you verified the cam is not eating lobes by measuring the pushrod movement?

Have you considered an oil analysis?
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Old Aug 8, 2024 | 04:05 PM
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Originally Posted by vette4fl
20 lbs sounds low. Is this just on the gauge, or did you also check the DIC?

Did the problems coincide with the cam installation?

Oil on the plug also indicates failing valve seals.

Have you verified the cam is not eating lobes by measuring the pushrod movement?

Have you considered an oil analysis?
DIC shows the same 20psi usually sits at 24 already tried replacing the pigtail and sending unit no luck. Some people tell me it’s fine as long as it’s going up it’s going up just fine, and I was thinking the same thing I just got everything built how I wanted it and valve seals worn and oil on the plugs that could be the isssue as for the measuring pushrods I’ll have to do that haven’t thought of that
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Old Aug 8, 2024 | 09:18 PM
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Here’s a clamping dial indicator base

https://www.harborfreight.com/clampi...H71Cql1vRoCmnY


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Old Aug 9, 2024 | 07:37 AM
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20 PSI at idle is fine. A 4 PSI drop at idle could be attributable to summer. By all means check the cam via the rockers.
Don’t forget the rockers have a ratio, so the short arm moves less than the long arm.

Last edited by redzg; Aug 9, 2024 at 07:43 AM.
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Old Aug 9, 2024 | 08:41 AM
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Originally Posted by redzg
20 PSI at idle is fine. A 4 PSI drop at idle could be attributable to summer. By all means check the cam via the rockers.
Don’t forget the rockers have a ratio, so the short arm moves less than the long arm.
sounds good thanks will pop the valve covers off and take a look
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Old Aug 9, 2024 | 08:42 AM
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Originally Posted by vette4fl
Here’s a clamping dial indicator base

https://www.harborfreight.com/clampi...H71Cql1vRoCmnY

good thing I have a harbor freight 5 minutes from my location!
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Old Aug 9, 2024 | 01:52 PM
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Moved to C5 Tech for more assistance.
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