Valvetrain help?
08-05-2010, 11:51 PM
#1
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Valvetrain help? I recently overheated my '95 Z28 6speed, it had always had tick and after it got alot worse. We first thought it was a collapsed lifter but we replaced them and stilll does it. Dad thinks its a valve guide? Pretty sure its in the valvetrain because it's defiantly not a rod knock(atleast I hope so..). Oils good no metal etc clean fresh still. Here's a short vid, just a shitty phone vid.
http://s12.photobucket.com/albums/a2...0804001530.mp4
*Note it doesn't sound as deep in person.
http://s12.photobucket.com/albums/a2...0804001530.mp4
*Note it doesn't sound as deep in person.
08-06-2010, 08:43 AM
#4
hard to tell by just listening to it but idk if that is valvetrain related.......to me i think is sounds like something in the bottom end.......maybe a broken piston ring landing or a burnt up piston......idk just a guess again kind of hard to tell from just that video....
08-06-2010, 05:51 PM
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hard to tell by just listening to it but idk if that is valvetrain related.......to me i think is sounds like something in the bottom end.......maybe a broken piston ring landing or a burnt up piston......idk just a guess again kind of hard to tell from just that video....
08-15-2010, 06:19 PM
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Use a stethoscope (harbor freight ones are about $4) and listen to the oil pan, and valve covers. Should be able to pin point a bit better by comparing the loudness of each spot tested. A screwdriver will also work but will not be able to hear the sound as well.
EDIT: also cut open you old oil filter. Check how much metal is in it.
EDIT: also cut open you old oil filter. Check how much metal is in it.
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08-15-2010, 11:42 PM
#8
To me it sounds like something in the bottom end but it's always hard to tell with a video. I would start by pulling both valve covers and taking a look to see if any of the rocker arms appear to be loose. Grab a screwdriver and put your ear up to the head and listen to each rocker individually to see if any of them are louder than the rest. Hopefully it's just a rocker or two that needs to be readjusted, good luck.
