|
|
|
|
||||||||||
| Xoutpost server transfer and maintenance is occurring.... |
| Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management |
 |
|
|
LinkBack | Thread Tools | Display Modes |
|
#1
09-15-2012, 06:08 PM
|
|||
|
|||
|
Thoughts on knocking noise...
I've got an interesting knocking noise from my 4.4...Timing chain guides are good (I've got them out of the truck right now, they look fine). I know I can hear a bit of VANOS rattle in there, but I think it might be rod knock... this theory might be confirmed by the fact that I can move some of the conrod bearing caps a little bit with a screwdriver. (I have the lower oil pan removed for inspection). I don't understand why the knock seems to go away at higher RPM though.... I thought rod knock was constant through the RPM range? Maybe I've caught it in time and can get away with replacing the conrod bearings? Interested in hearing everyone's thoughts on the matter. -Jeff Video: Direct link: M62tu - Knocking - YouTube
__________________
Current: '96 750iL '99 540i ///M '03 X5 4.4i Gone but not forgotten: '86 535i '06 325i '00 ///M5 '01 X5 4.4i '00 328i Last edited by Phyber0ptik; 09-15-2012 at 06:16 PM. Reason: Youtube link not working... 
|
| Sponsored Links | |
|
|
|
|
#2
09-15-2012, 07:15 PM
|
||||
|
||||
|
Hard to tell from the video, take another video from under the engine by the oil sump. You shouldn't be able to wiggle the conrod bearing caps so that is definitely suspect. However from the video it sounds like a collapsed valve lifter to me... If it it the bearings, you might have got lucky and might be able to get away with conrod bearing if you caught it in time, but you won't know until you pull them off and measure them up.
If you have the valve cover off you should be able to tell by pressing on the valve buckets and they shouldn't budge.
|
|
#3
09-15-2012, 07:19 PM
|
|||
|
|||
|
Would love to take another video, but this is the current state of the truck:
 Edit: I'll go check the valve buckets in a little bit. -Jeff
__________________
Current: '96 750iL '99 540i ///M '03 X5 4.4i Gone but not forgotten: '86 535i '06 325i '00 ///M5 '01 X5 4.4i '00 328i
|
|
#4
09-15-2012, 08:22 PM
|
|||
|
|||
|
Valve buckets checked, no squishiness, all solid.... That said, my m73 had collapsed lifters a while back, this is a different noise.
-Jeff
__________________
Current: '96 750iL '99 540i ///M '03 X5 4.4i Gone but not forgotten: '86 535i '06 325i '00 ///M5 '01 X5 4.4i '00 328i
|
|
#5
09-16-2012, 07:03 AM
|
|||
|
|||
|
Let us know what it was/is. That sounded fairly loud.
__________________
2006 4.8is, Black on White. SOLD Sniff Sniff. 2017 F85 x5m, Black on Red. BEAST MODE "The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain Unlock OBC post 5
|
|
| Bookmarks |
|
|
|
|
Linear Mode
