I know this is a known “thing” already, but just in case any of you haven’t heard already: the intake bolts on your 5.7L have a tendency to loosen up over time/miles and need to be re-torqued periodically.
My neighbor bought a used Charger with 89K miles on its 5.7L, and we were going over it to assess the condition of various items when the intake bolt thing crossed my mind. So I grabbed an 8mm socket and my torque wrench to check them, and sure enough every single one was waaay loose. All needed several turns of the torque wrench to get back to 105 in/lbs like they’re supposed to be.
If your 5.7L has >50K miles, you should definitely check ‘em.
If your 5.7L has anywhere close to 100K miles (especially if more), you WILL need to tighten them back down. (okay, there’s a possibility you won’t, but you’ll be the exception that proves the rule if you don’t have to!)
Bolts are 8mm and located just inside fuel rails along upper intake plenum. There are 10 of them IIRC.
Torque spec is 105 in/lbs if using a 1/4” torque wrench or ~8 ft/lbs if using a 3/8” drive torque wrench.
Also, you will need an extension for the torque wrench and socket to get down onto the bolts and clear the fuel rails so the wrench can ratchet freely.
Nuke
My neighbor bought a used Charger with 89K miles on its 5.7L, and we were going over it to assess the condition of various items when the intake bolt thing crossed my mind. So I grabbed an 8mm socket and my torque wrench to check them, and sure enough every single one was waaay loose. All needed several turns of the torque wrench to get back to 105 in/lbs like they’re supposed to be.
If your 5.7L has >50K miles, you should definitely check ‘em.
If your 5.7L has anywhere close to 100K miles (especially if more), you WILL need to tighten them back down. (okay, there’s a possibility you won’t, but you’ll be the exception that proves the rule if you don’t have to!)
Bolts are 8mm and located just inside fuel rails along upper intake plenum. There are 10 of them IIRC.
Torque spec is 105 in/lbs if using a 1/4” torque wrench or ~8 ft/lbs if using a 3/8” drive torque wrench.
Also, you will need an extension for the torque wrench and socket to get down onto the bolts and clear the fuel rails so the wrench can ratchet freely.
Nuke