More valve noise when engine's warm
Thread Starter
Racer
Joined: May 2001
Posts: 401
Likes: 0
From: Carlsbad CA
More valve noise when engine's warm
I drove the Vette to work today after finally sorting out some electrical problems. Sure is nice to be back on the road.
I did notice that as I pulled into the lot at work, the valve noise was substantially louder than it was after initial warm up. I have 1.6/1 roller rockers, and I'm used to them being louder than stamped steel, but I don't remember the valve noise increasing with engine temp. If anything, I'd have thought that things would quiet down because the parts should expand somewhat as they get hotter, decreasing the gaps between components.
Should I just go back and adjust lash when the engine is hot? I guess I'll cut an old valve cover, since I have tried the pushrod-twirling method when hot, and left some skin on motor.
Thanks!
I did notice that as I pulled into the lot at work, the valve noise was substantially louder than it was after initial warm up. I have 1.6/1 roller rockers, and I'm used to them being louder than stamped steel, but I don't remember the valve noise increasing with engine temp. If anything, I'd have thought that things would quiet down because the parts should expand somewhat as they get hotter, decreasing the gaps between components.
Should I just go back and adjust lash when the engine is hot? I guess I'll cut an old valve cover, since I have tried the pushrod-twirling method when hot, and left some skin on motor.
Thanks!
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by thebruce
10W-30. My temp never gets above 180. Should I go for a higher viscosity? The oil was changed within the last 500 miles.
Instructor
Joined: Jun 2005
Posts: 142
Likes: 15
From: Austin TX
Originally Posted by thebruce
Should I just go back and adjust lash when the engine is hot? I guess I'll cut an old valve cover, since I have tried the pushrod-twirling method when hot, and left some skin on motor.
Thanks!
Thanks!
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by corvettecris
Hmmm, mine are really noisy DURING initial start up. Oil too thick you think?
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