thodgkinson
Member
- Joined
- Jun 26, 2019
- Messages
- 6
- Reaction score
- 3
I was looking for a thread like this because I was experiencing a noise on startup I wasn't too fond of. After reading through this forum I find it worth posting my experience of the several noises discussed in here.
First, the loud "clunk" or "pop" on initial startup IS discussed in your owner's manuals. The manual says when using 87 octane fuel you may experience this and that it's perfectly normal and acceptable. They then recommend 89 octane to rid of that noise, but that 87 octane gas is fine. I read this in there on day 1 when I purchased my truck and have only ever put 89 since then because of it. I have never experienced a "pop" on startup. But, if you're running 87 octane then have no fear this is probably the case. If you really want to check to make sure it is just this, cycle a few tank or 89 through it and see if the noise still happens. I also recommend my next point.
Second, the "mechanical grinding" or "multiple clatters" sound was something I have been experiencing. I've wondered for the longest what's caused this and a user in this forum somewhere actually made a remark to this that seems like for some it just passed by. When you start the truck and have the break fully depressed, and continue to hold it fully depressed through startup, it makes this noise. I'm no mechanic or have any inclination as to why this is, but it does. Maybe a sort of clutch letting things slip as the engine turns? Couldn't tell ya. IF you touch the break to start the truck and IMMEDIATELY let off the break as the truck begins to start, once the engine starts turning it will not make this "multiple clattering" or " mechanical grinding" noise.
Now, all the little pops, ticks, and latching noises you hear for the next few seconds there after are all electronic motors of some sort that seem to all be normal function of ANY modern vehicle. As I have several vehicles across several manufacturers that have the same noises.
Now, my truck starts clean every time. No funky clatters or grinding noises. Sounds like a beautiful brand new engine. I have 18K miles on 5.7L Hemi, no E-torque.
First, the loud "clunk" or "pop" on initial startup IS discussed in your owner's manuals. The manual says when using 87 octane fuel you may experience this and that it's perfectly normal and acceptable. They then recommend 89 octane to rid of that noise, but that 87 octane gas is fine. I read this in there on day 1 when I purchased my truck and have only ever put 89 since then because of it. I have never experienced a "pop" on startup. But, if you're running 87 octane then have no fear this is probably the case. If you really want to check to make sure it is just this, cycle a few tank or 89 through it and see if the noise still happens. I also recommend my next point.
Second, the "mechanical grinding" or "multiple clatters" sound was something I have been experiencing. I've wondered for the longest what's caused this and a user in this forum somewhere actually made a remark to this that seems like for some it just passed by. When you start the truck and have the break fully depressed, and continue to hold it fully depressed through startup, it makes this noise. I'm no mechanic or have any inclination as to why this is, but it does. Maybe a sort of clutch letting things slip as the engine turns? Couldn't tell ya. IF you touch the break to start the truck and IMMEDIATELY let off the break as the truck begins to start, once the engine starts turning it will not make this "multiple clattering" or " mechanical grinding" noise.
Now, all the little pops, ticks, and latching noises you hear for the next few seconds there after are all electronic motors of some sort that seem to all be normal function of ANY modern vehicle. As I have several vehicles across several manufacturers that have the same noises.
Now, my truck starts clean every time. No funky clatters or grinding noises. Sounds like a beautiful brand new engine. I have 18K miles on 5.7L Hemi, no E-torque.
