Vipergts662
Active Member
- Joined
- Jan 20, 2004
- Messages
- 275
- Location
- Houston
- Car(s)
- 2016 Holden Commodore (chevy ss), 2020 Explorer ST
For about a year and a half the engine when heat soaked after a drive has a good knock like a diesel. After the initial start everything is fine on a cold start it sounds like a 6.2 liter V8 should. I have also had blackstone do an oil analysis after every change with the latest analysis coming back above average for an LS3 with 33,5XX miles from a wear standpoint it is in good shape.
Interestingly enough another guy with an SS in town is having a similar issue and has taken the car to two different dealers. The first dealer looked at the car at least five times and even flew down an engineer from Michigan to look at it with his analysis being its normal for an LS3. The other dealer has replaced his fuel injectors twice and three months after the last replacement the issue is coming back. I took my car to the first dealer last week to document the car had been looked at basically knowing what they were going to say. My angle is if the engine craps out before the power train warranty expires in the next two years I have it on record I took it in with them giving it a clean bill of health. BTW car is bone stock outside of the wheels and 6 pot brembos on the front, I have also added one of the DEI insulation blankets to the starter to minimize the infamous starter heat soak the LS3 is known for.
Is it normal for an engine to knock like that on a hot start and what can I do from my end to try and chase down this issue? Of all the different engine configurations and brands I have had this is the only one that behaves like this. Has anyone ever heard of this being normal for an LS3 the engineer calls it an "echo".
Thanks,
Andy
Interestingly enough another guy with an SS in town is having a similar issue and has taken the car to two different dealers. The first dealer looked at the car at least five times and even flew down an engineer from Michigan to look at it with his analysis being its normal for an LS3. The other dealer has replaced his fuel injectors twice and three months after the last replacement the issue is coming back. I took my car to the first dealer last week to document the car had been looked at basically knowing what they were going to say. My angle is if the engine craps out before the power train warranty expires in the next two years I have it on record I took it in with them giving it a clean bill of health. BTW car is bone stock outside of the wheels and 6 pot brembos on the front, I have also added one of the DEI insulation blankets to the starter to minimize the infamous starter heat soak the LS3 is known for.
Is it normal for an engine to knock like that on a hot start and what can I do from my end to try and chase down this issue? Of all the different engine configurations and brands I have had this is the only one that behaves like this. Has anyone ever heard of this being normal for an LS3 the engineer calls it an "echo".
Thanks,
Andy