Hi all, I've searched high and low for a solid answer to the infamous D22 engine rattle and have had no luck. I'm getting very very desperate and hope someone can help me out.
2013 Navara D22 (YD25).
I can trigger the noise by doing the following (in any gear, but easiest in 3rd and 4th):
Drive up to 2400-2500 rpms, let off the throttle. As the engine slows down, a wicked vibration/rattle/hum starts. This does not go away until I drop below about 1800rpms or change gears. The sound is LOUD and is sort of a mix of a rattle and hum. It sounds metallic and the speed of the vibration matches the speed of the engine. I DO NOT feel any vibration through the steering wheel or elsewhere...only hear it. edit: this also only seems to be an issue when engine has warmed up. doesn't occur when engine is cold
The vibration does NOT occur with normal acceleration through all gears. And it idles perfectly smoothly. I also don't think it occurs in neutral when revving the engine, but it is hard to tell if that is the case.
Suggested solutions I have tried and/or ruled out:
Heat shields - have put jubilee clamps and padding around the shields at cat and under passenger footwell, no relief. Nothing feels loose
Front propshaft - as the D22 has locking hubs, this should mean the propshaft will not spin in 2WD, correct? So that can only be an issue in the D40s
Turbo leak - since it stops vibrating when slowing below1800rpms, i thought maybe turbo problem....but I don't hear this when accelerating over 2000rpms, only when the engine SLOWS down from fast speed, I don't see how this could be the issue
Air-box - This seems pretty solid and not likely the culprit
Fan and shrouding - Someone has suggested this is the problem, while the plastic shrouding does have SOME play....I don't think this is it.
Other than that, I guess that leads to a potential timing chain or injector issue. But I would expect i would hear symptoms of either of those at idle and/or acceleration. Have also read many owners replaced/serviced both of these and the issue persists....so I am hesitant to spend big bucks on something that will not solve my issue.
Would really appreciate some insight from someone with experience with this issue. The navara drives well and performance seems fine, but this is LOUD and very frustrating. Thanks in advance!
2013 Navara D22 (YD25).
I can trigger the noise by doing the following (in any gear, but easiest in 3rd and 4th):
Drive up to 2400-2500 rpms, let off the throttle. As the engine slows down, a wicked vibration/rattle/hum starts. This does not go away until I drop below about 1800rpms or change gears. The sound is LOUD and is sort of a mix of a rattle and hum. It sounds metallic and the speed of the vibration matches the speed of the engine. I DO NOT feel any vibration through the steering wheel or elsewhere...only hear it. edit: this also only seems to be an issue when engine has warmed up. doesn't occur when engine is cold
The vibration does NOT occur with normal acceleration through all gears. And it idles perfectly smoothly. I also don't think it occurs in neutral when revving the engine, but it is hard to tell if that is the case.
Suggested solutions I have tried and/or ruled out:
Heat shields - have put jubilee clamps and padding around the shields at cat and under passenger footwell, no relief. Nothing feels loose
Front propshaft - as the D22 has locking hubs, this should mean the propshaft will not spin in 2WD, correct? So that can only be an issue in the D40s
Turbo leak - since it stops vibrating when slowing below1800rpms, i thought maybe turbo problem....but I don't hear this when accelerating over 2000rpms, only when the engine SLOWS down from fast speed, I don't see how this could be the issue
Air-box - This seems pretty solid and not likely the culprit
Fan and shrouding - Someone has suggested this is the problem, while the plastic shrouding does have SOME play....I don't think this is it.
Other than that, I guess that leads to a potential timing chain or injector issue. But I would expect i would hear symptoms of either of those at idle and/or acceleration. Have also read many owners replaced/serviced both of these and the issue persists....so I am hesitant to spend big bucks on something that will not solve my issue.
Would really appreciate some insight from someone with experience with this issue. The navara drives well and performance seems fine, but this is LOUD and very frustrating. Thanks in advance!
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