Engine loud ticking from valve area w/ video
05-07-12, 11:13 AM
Intermediate
Thread Starter
Join Date: Aug 2008
Location: CA
Posts: 476
Engine loud ticking from valve area w/ video
Started about 2 weeks ago. sc300 140K.
Sound is coming from the front (facing the bumper) area of the valve cover on the right side.
Here is a video w/ sound.
Anyone know?
05-07-12, 11:20 AM
Lead Lap
Join Date: Feb 2012
Location: IL
Posts: 442
Likes: 0
That sounds pretty loud for a valve. Sounds deep. usually when the hydraulic lash adjusters fail they click... tick tick tick tick.
05-07-12, 12:01 PM
Super Moderator
Join Date: May 2009
Location: A Mile Ahead of You
Posts: 6,134
if you are sure it is coming from the upper part of the engine or head area , make sure that your camshaft bolts are not loose, if they are not then probably valve lash/clearances but if you didnt change cams then I dont see why valve lash would be the issue.
Last edited by gerrb; 05-07-12 at 01:13 PM .
05-07-12, 01:43 PM
Lexus Test Driver
Join Date: Aug 2008
Location: CA
Posts: 7,015
Can be piston rings, valve lash or piston pin. Get it checked out.
05-07-12, 03:19 PM
Lexus Champion
Join Date: May 2009
Location: Raleigh NC
Posts: 2,544
Pull the accessory belt and run without it to see if its a driven accessory before you go tearing into the engine.
05-07-12, 03:42 PM
Lexus Test Driver
Join Date: Aug 2008
Location: CA
Posts: 7,015
Its a knocking noise. Most likely engine related
05-19-12, 07:11 PM
Intermediate
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Join Date: Aug 2008
Location: CA
Posts: 476
Turns out the cam pulley was loose and rattling. It wore down the steel on the cam so we fitted a steel shim and tapped it in to balance it out.
05-19-12, 07:21 PM
Lexus Champion
Join Date: May 2009
Location: Raleigh NC
Posts: 2,544
Good find.
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05-07-12, 12:01 PM
