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Flat Cam Lobe?

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Old Jul 19, 2018 | 03:26 PM
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Originally Posted by Huggerbugger
This aint' my first barbecue, Cletus. Replace plugs and wires first.
Cletus? Really? You're asking for help and suggestions and then reply with smart a$$ remarks ... Okee Dokee
 
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Old Jul 19, 2018 | 04:07 PM
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Originally Posted by FLASH1970
Leakdown test. If you don't have a fancy leakdown test tool you can do the redneck test. Take a compression tester and take the valve out of the hose. Set the gauge aside, as you will not need it. Put the piston at TDC. Thread the hose into the spark plug hole, and hook up the compression tester hose to your air compressor and shoot some air into it. If air comes out the intake, intake valve. If it comes out of the exhaust, exhaust valve. If it comes out of the crankcase vent, rings or hole in piston. If a spring broke, it might have let the valve sag which might have hit a piston and bent it.

If it runs fine up until 3k, might be a lifter not building up hydraulic pressure.
It runs crappy up to 3k then it gets really crappy.
 
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Old Jul 19, 2018 | 04:26 PM
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Originally Posted by Huggerbugger
This aint' my first barbecue, Cletus. Replace plugs and wires first.
So, instead of doing a little troubleshooting (simple cheap stuff first, like compression check), you start by buying parts...

You don`t sound like much of a cook, or a mechanic...

Being a smartass is no way to get help, here or anywhere...
 
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Old Jul 19, 2018 | 04:42 PM
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sounds like he has it figured out on his own..I don't know why he is asking for help ! there are a lot of knowledgeable people on this forum !
 
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Old Jul 19, 2018 | 05:32 PM
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Did you use Nitrogen or just plain air to inflate your cams?
 
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Old Jul 19, 2018 | 05:42 PM
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Helium, with a catalyst, nitrided with inhibitors from chrome molly anodes.
 
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Old Jul 19, 2018 | 08:01 PM
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At any point in engine rpm . . . does anything start humming to you? LMFAO
 
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Old Jul 19, 2018 | 10:38 PM
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Originally Posted by FLASH1970
....If it runs fine up until 3k, might be a lifter not building up hydraulic pressure.
I doubt you have enough miles on it to flatten a cam that runs under roller lifters. More likely the lifters.
 
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Old Jul 19, 2018 | 10:59 PM
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Got 20k on it and I can feel something knocking at all speeds.
 
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Old Jul 19, 2018 | 11:19 PM
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I just did cams and lifters on my 08 because I had some strange sounds (73k miles) coming from my cam chest... took care of the noise. If it's dying at 3k... I'm betting lifters.

My stock cam still looked great btw...
 
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