|
|
SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS! |
Post Reply |
|
Thread Tools | Search this Thread |
11-04-2019, 02:56 PM | #1 |
Enlisted Member
1
Rep 36
Posts |
N52 knock at cold start
2006 3.0si, N52
This noise has been happening intermittently at am startups - disappears after about 10 minutes. Appears to be coming from the driver's side, mid-engine, and varies with engine speed. It's not the lifter tick that's also common - I have that occasionally as well. The dreaded vanos rattle? DISA Valve? Last edited by Juggernaught5; 11-04-2019 at 03:24 PM.. |
11-06-2019, 02:54 PM | #3 |
Enlisted Member
21
Rep 49
Posts
Drives: Z4MR
Join Date: Aug 2019
Location: NA
|
Possibly piston slap.
|
Appreciate
0
|
11-07-2019, 09:35 PM | #4 |
New Member
16
Rep 23
Posts |
Mine makes exactly the same noise at every cold start. I have a 2006 3.0i. It only starts once the engine slows down to normal idle speed, and it goes away as soon as I begin driving. If the engine is warm there is no knocking. The noise is worse if the car has been sitting for a week, and better if I drive it fairly hard for several days in a row. Anyone else have any ideas as to what it could be? I have been considering replacing the injectors as a preventative maintenance item, as they are original and I have 154k miles.
__________________
2006 E85 Z4 3.0i: manual, sport package, premium package, sport seats, xenon headlights, premium audio, navigation, no mods yet.
|
Appreciate
0
|
11-10-2019, 08:13 PM | #5 |
Enlisted Member
1
Rep 36
Posts |
The car is going into the shop tomorrow for a climate control module replacement, and I'm going to ask about it then. I'll provide an update once I know more. Even when this noise goes away, I am hearing a bit of a rattle-like sound if I'm driving and let off of the throttle. I'm thinking the DISA valve, although I thought the issue with these was solved by my car's July 2006 production date.
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|