What's new

Cold start noise

Deadstockpomp

Member
Joined
Nov 29, 2021
Messages
33
Reaction score
8
Points
8
Location
NY
Not sure if it’s necessarily a problem but I have 8xx miles on my 6.2 boss and ever since I got it I realized on cold starts for like a second maybe a second and a half I hear a knocking/marble/ticking sound. I can hear it from inside my house sometimes with the window open. It goes away immediately and dosent do it on a warm start. Is this piston slap? Injectors? Anyone else hear this?
 
Last edited:

Jmzvet

Well-known member
Joined
Dec 27, 2020
Messages
630
Reaction score
395
Points
63
Location
San Diego CA
Maybe you could listen to another 6.2 and see if it sounds the same? The V6 in my Acura sounds a lot different than the 5.3 in my TB. Just a suggestion(y).
 

Spyderwebb

Member
Joined
Jul 8, 2020
Messages
53
Reaction score
39
Points
18
Occasionally I hear a bit of a "rattle" on cold starts, just for a moment.

After listening more carefully I have concluded that it is an exhaust noise. I beleive it is coming from the bottom of the truck, hence some kind of start up exhaust sound near the catalytic converters, maybe some sort of cavitating exhaust pressure effect on start up?

Not concerned, I ve had my 6.2 Trail Boss almost 2 years and have about 20K miles now.

Continue to be very pleased with the truck!!
 
Last edited:

PHXPHOTOG

Active member
Joined
May 22, 2021
Messages
139
Reaction score
123
Points
43
Location
PHX, AZ
Mine does that occasionally. It is the end of the exhaust pipe vibrating against the exhaust tip. The pipe end is just sitting in the tips and not perfectly centered.

Steve
 

HopnDude

Member
Joined
Feb 6, 2022
Messages
59
Reaction score
12
Points
8
Location
Home
Yeah, I've already hear this sound, and doesn't sound mechanical in nature (ie. engine/trans) so I'm not concerned.
 
OP
OP
Deadstockpomp

Deadstockpomp

Member
Joined
Nov 29, 2021
Messages
33
Reaction score
8
Points
8
Location
NY
This is the exact noise I’m getting ! You can hear the braaaaap for like a second. This is not my truck btw

 

Baz

Active member
Joined
Oct 1, 2020
Messages
157
Reaction score
107
Points
43
Location
The Pacific Northwest
My 6.2 has a bad case of the braaaaaaaps on cold starts too… I’ve got the Borla Touring cat back system, so I’m thinking it’s the cats.
 
OP
OP
Deadstockpomp

Deadstockpomp

Member
Joined
Nov 29, 2021
Messages
33
Reaction score
8
Points
8
Location
NY
My 6.2 has a bad case of the braaaaaaaps on cold starts too… I’ve got the Borla Touring cat back system, so I’m thinking it’s the cats.
I have a stock exhaust. I was doing some reading and it seems the oil pump can make weird noises like that on cold starts. I’m not 100% sure though
 
  • Like
Reactions: Baz

Latest Discussions...

Top