View Single Post
      03-08-2013, 05:10 PM   #209
thekurgan
Bad Lieutenant
thekurgan's Avatar
United_States
107
Rep
3,339
Posts

Drives: E90M3
Join Date: Aug 2007
Location: Sacramento

iTrader: (0)

Garage List
2008 BMW M3  [0.00]
Quote:
Originally Posted by mose121 View Post

"CORRECTION: VERIFIED CUSTOMERS KNOCK CONCERN. KNOCK NOISE HAPPENS APPROX 60% OF THE TIME ON COLD STARTS. WHEN NOISE OCCURS IT HAPPENS ONE TIME AND ONE TIME ONLY. THE NOISE IS VERY SIMILAR TO A DOOR KNOCK. WE HAVE LISTENED TO THE ENGINE WITH STETHOSCOPES AND FELT VARIOUS COMPONENTS WHILE THE KNOCK IS HAPPENING. WE HAVE RULED OUT THE STARTER MOTOR AND THROTTLE MOTORS DUE TO THE FACT THAT THE KNOCK CAN NOT BE FELT AT THOSE COMPONENTS. WE COULD FEEL A SLIGHT REVERB FROM THE NOISE IN THE FRONT OF THE ENGINE. REPLACED TIMING CHAIN TENSIONERS AND RETESTED. KNOCK NOISE RETURNED AFTER TENSIONERS WERE REPLACED. STARTED TC CASE. WE WERE ABLE TO GET THE ENGINE TO MAKE NO NOISE WITH EITHER ONE OR BOTH OF THE THROTTLE MOTORS UNPLUGGED. THIS PUTS THE ENGINE INTO BASE CAMSHAFT TIMING. WE CHECKED THE OIL PRESSURE. OIL PRESSURE RAISES QUICKLY TO 90PSI AND DROPS TO 75PSI WHEN THE KNOCK NOISE HAPPENS THEN RETURNS TO 90PSI. WE REPLACED THE VANOS OIL CHECK VALVES DUE TO OIL BLEADING DOWN IN THE SYSTEM WHEN CAR SITS FOR EXTENDED PERIODS AND NOISE IS PRESENT. NOISE NO LONGER PRESENT AFTER REPAIR."
Would these be the correct parts: Group #1 and 4?
Attached Images
 
__________________
02 E39M5 | TiAg/Schwartz | Tubi Rumore | Ultimate Ti Pedals | E60 SSK

Last edited by thekurgan; 03-08-2013 at 05:10 PM. Reason: shitty speller