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PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > 1st test drive. (Motor built by GTOFREEK- Paul Carter)
 
 
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Old 09-23-2019, 03:35 PM
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chiphead chiphead is offline
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Join Date: Nov 2004
Location: Aiken, SC
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Originally Posted by chiphead View Post
Confirmation of piston material is helpful. My motor made a dull double knock noise at TDC and BDC, especially when engine wasn't warmed up. Since (most? all?) 8 cylinders were doing it, it had a rhythmic double rap that I got used to. I just didn't hammer on it before it warmed up. When water temps were up, the noise would be hard to hear, kinda like Sirrotica said.

I'm not saying this is piston slap for sure. One of those videos Joe posted had a double knock sound on the driver's side that sure mimics what my motor would do, just louder.

snip.....
Just sayin...... *GRIN EMOJI*

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