350 major problem, need help!

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Jul 17, 2007 | 01:09 PM

camaro84

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From: Belton, Texas

350 major problem, need help!

my 350 engine recently started knocking, so i took off the valve cover because that is where the sound is coming from and the 4th cylinder exhaust valve,spring,rocker,pushrod is not moving when the motor is running. what are the possible problems?

Jul 17, 2007 | 01:23 PM

mzoomora

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From: Chicago, Il

A flat cam or a broken lifter.

Jul 17, 2007 | 01:56 PM

Jon5212

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From: Indianapolis Indiana

Wow... Cam lobe is broken? I would think even with a collapsed lifter it would still move a little bit? Maybe I'm wrong...

Jul 17, 2007 | 02:37 PM

jmm98LS1

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Probably wiped cam lobe and chewed up the lifter. I lost the #5 exhaust lobe (comp xtreme energy) on my old 355 after just 12k miles. The lifter was missing nearly .25" and the lobe barely had a ramp left. It still moved the valve a tiny bit though.