Engine Rattle
#1
Engine Rattle
have had my 5.5 for almost 10 years 114k miles. Engine rattle began at 40k. Got the short block replaced at 40k under warranty. Only Mobil 1 snythethic 5w 30. Around 80k the rattle began to show up in every gear I drove in. I have read all threads and know the possible reasons: bad rings, oil consumption, bad gas ( 91 only), dirty or leaking oil in Front and rear valve all replaced and done and any other minor issues that arose. i think its the cheap rings that the engine has in the pistons.
My only question is should I be worried that the rattle will eventually crap out my engine or since I am at 114k that if nothing has happen by now besides the sound, just let it be?
My only question is should I be worried that the rattle will eventually crap out my engine or since I am at 114k that if nothing has happen by now besides the sound, just let it be?
#2
When I first seen the thread title, I was thinking it was going to be the rattle on start-up from the timing chain. But seeing that u said in between shift n such it just doesn't sound like an engine internal problem. Unless it was a risk pin on the connector rods. But are you sure you looked at all other possibilities. Exhaust rattle maybe? Even the hood of the car could make a rattling noise. Their are two rubber grommets on the hood that u could turn to take up slack in the hood. Heat shields are a possibility also. Have you visually checked your engine mounts??? I'm not sure if your car is a auto or a 6spd, hopefully u are a manual. But I noticed that rattling noises are more noticeable if u have the car in reverse with the emergency brake pulled up and have someone quickly engage the clutch almost to the point where it is about to cut out then disengage quickly...You will be able to see the movement of the engine and see if its moving too much. It also may enable u to reenact the rattle while stopped so that you can isolate the problem....I hope I helped you!
#3
thanks for your input. Sorry I think I mislead you. The rattle comes in any gear( Manual 1-6 speed) when i am fully engaged in a gear and I acclerate at a moderate pace, the rattle appears and it is coming from the engine without a doubt. HeatShields, I guess I should look into that more. It would not be engine mounts that because I know how that sounds and its not that. Does the heat shields rattle or somethign when you accelarte. This does not come about when I am in neutral and press on the acclerator. IT does go away if I accelerate and floor it. It is only when i do a normal accleration on the car again in any gear 1st, 2nd majorly in 3rd and 4th and a little in 5th and 6th. I have tried it on the freeway and its so loud that I can still hear it even with freeway noise.
#4
What octane gas are you using? When is the last time you used a fuel injector/combustion chamber cleaner? Sounds like pre-ignition, aka pinging. Had it in my 4AT at light throttle from 1500-2000 rpms and it was noticeably worse when I was in Phoenix where the premium is 91 octane and not 93 like it is here. As long as it isn't severe, it shouldn't be a problem. I had 194,595 miles on my 4AT when it was hit and totaled and it was running great. So far, I haven't noticed any pinging with my 6MT. It also doesn't use oil like my other 5.5 gen did though
#5
At what RPM's are you noticing the rattling?
Do you have a CEL on, or at least intermittently on?
If so, what code is it?
If you can tell that the rattling is coming in around 1700-2000 rpm or close to that range in each gear, there are several threads on here.
Problem could be heat shield, the timing chain or bad cats. Try to find out if you can see if the rattle comes at a specific rpm each time and if so, do a search on those.
Do you have a CEL on, or at least intermittently on?
If so, what code is it?
If you can tell that the rattling is coming in around 1700-2000 rpm or close to that range in each gear, there are several threads on here.
Problem could be heat shield, the timing chain or bad cats. Try to find out if you can see if the rattle comes at a specific rpm each time and if so, do a search on those.
#6
thanks for your input. Sorry I think I mislead you. The rattle comes in any gear( Manual 1-6 speed) when i am fully engaged in a gear and I acclerate at a moderate pace, the rattle appears and it is coming from the engine without a doubt. HeatShields, I guess I should look into that more. It would not be engine mounts that because I know how that sounds and its not that. Does the heat shields rattle or somethign when you accelarte. This does not come about when I am in neutral and press on the acclerator. IT does go away if I accelerate and floor it. It is only when i do a normal accleration on the car again in any gear 1st, 2nd majorly in 3rd and 4th and a little in 5th and 6th. I have tried it on the freeway and its so loud that I can still hear it even with freeway noise.
#7
At what RPM's are you noticing the rattling?
Do you have a CEL on, or at least intermittently on?
If so, what code is it?
If you can tell that the rattling is coming in around 1700-2000 rpm or close to that range in each gear, there are several threads on here.
Problem could be heat shield, the timing chain or bad cats. Try to find out if you can see if the rattle comes at a specific rpm each time and if so, do a search on those.
Do you have a CEL on, or at least intermittently on?
If so, what code is it?
If you can tell that the rattling is coming in around 1700-2000 rpm or close to that range in each gear, there are several threads on here.
Problem could be heat shield, the timing chain or bad cats. Try to find out if you can see if the rattle comes at a specific rpm each time and if so, do a search on those.
#10
Does the heat shields rattle or somethign when you accelarte. This does not come about when I am in neutral and press on the acclerator. IT does go away if I accelerate and floor it. It is only when i do a normal accleration on the car again in any gear 1st, 2nd majorly in 3rd and 4th and a little in 5th and 6th. I have tried it on the freeway and its so loud that I can still hear it even with freeway noise.
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lrb6805
4th Generation Maxima (1995-1999)
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09-17-2015 04:49 PM