Reply With QuoteCould be VaNOS rattle -- still 117k miles on the car?
It would be more like a tick, from the top front of the motor.
best, whit
2 Grand Master
Light knocking on cold start 95 525i
Noticed a light knocking this morning as my wife pulled out of the driveway in my 95 525i. It was the first start of the day (about 45 degrees). Did not really seem to change with change in engine speed.
When she returned no knock after engine warmed up. Not sure what is causing this. Oil and filter changed 600 miles ago with oil level proper. Belts and pullies, water pump and motor mounts all within 12 months. No sure there is any issue.
TIA
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment
3 Grand Master
Could be VaNOS rattle -- still 117k miles on the car?
It would be more like a tick, from the top front of the motor.
best, whit
Green Beret Special Ops
what oil are you using?
95 E34 530I V2.37
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Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy
Major Contributor
Whatever he's using, I bet he'll end up using Mobil 1 0W40 after you're done with himOriginally Posted by 632 Regal
BMW E34 528i, M52B28 + M50 manifold, Remus exhaust, ///M Parallel Spoke 18" rims
Grand Master
I still get the rattle with ow40 =p.
www.KaRealtySF.com
Build Date: 05-1995 /Engine: m50tu /Automatic Transmission /ABS /NO ASC /Open Differential /EAT Chip
2 Grand Master
currently in Auto-RX rinse phase
Currenty 600 miles into an Auto-rx rinse phase. Auto-rx is a gentle metal cleaner not a harsh flush. See past posts for discussion or check BOBISTHE OILGUY forum. You must use conventional (not synthetic oil) oil for 2,000 miles then use what you want. I am using Havoline 10w40. In the past I used Mobil 1 0w40 and Mobil 1 truck and suv 5w40. When this process is over, I will go back to Mobil 1.
Possible that this process is causing some strange noises. From BOBISTHE OILGUY I understand it can cause some unusual behavior as it cleans..
Last edited by Russell; 11-05-2005 at 02:03 PM.
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment
Green Beret Special Ops
has the noise just started after you started doing this flush thing? whats the oil look like?
95 E34 530I V2.37
===========
Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy
2 Grand Master
still 117,000 miles or so
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment
2 Grand Master
just did it once today
The knock is new today as near as I can tell. The flush thing started about 2,100 miles ago. The rinse oil looks great. I do a blotter test on it every 2 weeks to see how the color changes. It is it slowly getting darker. About the same as Mobil 1 does.
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment
Bentley Guide says a light knock that goes away after a couple of minutes is normal with outside colder temps. As oil pressure builds and engine warms, it should go away.
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