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07-18-2019, 11:45 PM
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#1 |
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Registered User
Join Date: May 2007
Location: CO
Posts: 473
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Engine noise
I know this isn't a GM truck, but it is GM. Around the 4:00 mark and beyond is what I believe to be valvetrain noise along with maybe some knocking? Am I off base?
https://www.youtube.com/watch?v=6-v3...ature=youtu.be |
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07-19-2019, 07:24 AM
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#2 |
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Registered User
Join Date: Oct 2013
Location: Maine
Posts: 2,334
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Re: Engine noise
I don't like the sound of it. The valve train is pretty noisy. I wonder if it would be a solid lifter cam? When they walk around the drivers side it sounds like a pretty solid tap (knock). I would be worried but I have never had a solid lifter cam to know how loud they can be
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76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10 |
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07-19-2019, 08:53 AM
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#3 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,512
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Re: Engine noise
Doesn’t sound like a solid lifter. It wouldn’t sound so deep.
Might be fuel pump push rod or a rocker tapping the valve cover inside. On a side note, if it’s truly a Chevelle SS 396 that’s Canadian built then it would have the Z25 rpo stamped on the cowl tag. US built cars didn’t have the rpo on the tag. |
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07-19-2019, 01:57 PM
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#4 |
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Registered User
Join Date: May 2007
Location: CO
Posts: 473
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Re: Engine noise
In the video, he mentions having a retro fit roller cam/lifters/rocker setup installed--no mention of the brand.
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