|
|
|
|
 |
 
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
|
BMW 3-Series (E90 E92) Forum
>
Help with grinding noise on intake side of engine
|
 |
| 09-18-2025, 07:32 PM | #1 |
|
Registered
1
Rep 3
Posts |
Help with grinding noise on intake side of engine
I have a 2008 328xi e90 with an n52 that has a grinding noise on the intake side which gets faster when first accelerating then goes away at higher rpm, will do it at idle as well.
|
| 09-19-2025, 04:58 AM | #2 |
|
Brigadier General
 
688
Rep 3,288
Posts
Drives: E92 325i MSport Coupe
Join Date: Apr 2012
Location: UK South East
|
Failed bearings in either alternator pulley or tensioner pulley..?
__________________
E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace with cross bar; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
|
|
Appreciate
1
Carlson55041.00 |
| 10-16-2025, 07:50 AM | #4 |
|
Private First Class
 
98
Rep 132
Posts |
if it goes away suddenly over 4k rpm, suspect disa valves rattle (if you have 'em!)
or maybe something related to oil pressure, a noise that gets faster with rpm could be lifters or nearby hardware, it may get better at higher rpm due to more oil pumping up there
__________________
EURO E92 325i N52B30 SWAP 6MT | N54 MANIFOLD | MILVS | 22RPD
|
|
Appreciate
1
kkasson551.50 |
 |
| Bookmarks |
|
|
