Mechanical Roller lifters or Noisy Injectors
03-22-2018, 03:59 PM
#1
Mechanical Roller lifters or Noisy Injectors
I'm an old school C-2 owner, have a new Grand Sport and I want to know if the engine noise is solid lifters or noisy fuel injectors, Thanks, Richie.
03-22-2018, 04:02 PM
#2
The following users liked this post:
academyrich (03-22-2018)
03-22-2018, 05:01 PM
#4
Le Mans Master
Member Since: Sep 2012
Location: Hagerstown MD
Posts: 6,876
Received 1,738 Likes
on
1,174 Posts
St. Jude Donor '15-'16,'18
Especially after a cold start and in cold ambient tempertures.
03-22-2018, 05:06 PM
#6
Le Mans Master
Member Since: Sep 2012
Location: Hagerstown MD
Posts: 6,876
Received 1,738 Likes
on
1,174 Posts
St. Jude Donor '15-'16,'18
They are not mechanical, standard hydraulic lifters. It's the injectors that are noisy.
03-22-2018, 05:14 PM
#7
Race Director
03-22-2018, 05:19 PM
#8
The lifters do play a part in the sound you are hearing. Since the introduction of the LS1 in 1997, the cam profile for these engines has a high ramp rate to help the valves open wide. This results in some valve clatter as well.
03-22-2018, 11:48 PM
#9
Race Director
Without actually hearing the sound you are referring too, it's actually anyone's guess.
The direct injection system will make a ticking noise. If it's more a consistent "tick" and located towards the drivers side rear of engine it's probably the fuel pump push rod.
The direct injection system will make a ticking noise. If it's more a consistent "tick" and located towards the drivers side rear of engine it's probably the fuel pump push rod.
03-23-2018, 02:16 AM
#10
Whatever it is, the LT engines don't have a smooth purr to them...especially when cold.