tapping when cold
Race Director
Joined: Sep 1999
Posts: 12,435
Likes: 916
From: CONCORD NC
all engines run dry for a few seconds (some many seconds). Some engines are just noisier than others.
The only way to eliminate it completely would be to install some sort of pre-luber, like an accusump, to feed pressurized oil to the engine prior to and during startup.
The noise is likely the lifters compression slightly, which really isn't a wear issue. The main journals get oil first, and then the valvetrain, so the important parts get protection, even though you may hear valvetrain noise (lifters, rockers).
Unless it gets worse, I wouldn't worry about it. Just don't rev the engine until the pressure is stable
The only way to eliminate it completely would be to install some sort of pre-luber, like an accusump, to feed pressurized oil to the engine prior to and during startup.
The noise is likely the lifters compression slightly, which really isn't a wear issue. The main journals get oil first, and then the valvetrain, so the important parts get protection, even though you may hear valvetrain noise (lifters, rockers).
Unless it gets worse, I wouldn't worry about it. Just don't rev the engine until the pressure is stable
Melting Slicks
Joined: Nov 2003
Posts: 2,312
Likes: 82
From: Ridgeland MS
St. Jude Donor '06-'07-'08-'09-'10-'11
Originally Posted by davidfarmer
all engines run dry for a few seconds (some many seconds). Some engines are just noisier than others.
The only way to eliminate it completely would be to install some sort of pre-luber, like an accusump, to feed pressurized oil to the engine prior to and during startup.
The noise is likely the lifters compression slightly, which really isn't a wear issue. The main journals get oil first, and then the valvetrain, so the important parts get protection, even though you may hear valvetrain noise (lifters, rockers).
Unless it gets worse, I wouldn't worry about it. Just don't rev the engine until the pressure is stable
The only way to eliminate it completely would be to install some sort of pre-luber, like an accusump, to feed pressurized oil to the engine prior to and during startup.
The noise is likely the lifters compression slightly, which really isn't a wear issue. The main journals get oil first, and then the valvetrain, so the important parts get protection, even though you may hear valvetrain noise (lifters, rockers).
Unless it gets worse, I wouldn't worry about it. Just don't rev the engine until the pressure is stable
The valve train in the LS2 motor is slightly noiser that the LS1. I would just keep an ear 
on it! 
Bill
Le Mans Master
Joined: Jan 2005
Posts: 5,611
Likes: 5
From: Thousand Oaks California
Normal.
Sometimes mine does it after setting over night. Sometimes it can set for a week and will not have the tappet noise on start up. I can never predict when it will or will not have the tappet noise on start up. It does not seem to be related to ambient temperature, but it does seem to be related to oil temp, in that the oil temp is always below 60 degrees F when this occurs.
Sometimes mine does it after setting over night. Sometimes it can set for a week and will not have the tappet noise on start up. I can never predict when it will or will not have the tappet noise on start up. It does not seem to be related to ambient temperature, but it does seem to be related to oil temp, in that the oil temp is always below 60 degrees F when this occurs.
