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      07-25-2013, 08:01 AM   #67
MMMMM3
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Quote:
Originally Posted by Ali@BMWMt.laurel View Post
1.0 Engine
The new S65B40 V8 engine is a high performance engine designed and built to exacting BMW Motorsport tolerances which take into account the high performance nature of this engine.
The new S65B40 V8 engine has the following characteristic sounds which dealers need to be aware of.

1.1 Knocking type sound at idle
When the engine is at normal operating temperature and depending upon the accessory loads on the engine it is possible a low frequency knocking type noise may be heard in the car. This noise is a characteristic of the engine and is not an indication that there is a defect with the engine. In the event that you receive an inquiry about this noise it is important to reassure the customer that this
noise is a characteristic of this engine. The noise in no way affects the durability of the engine and will not lead to a failure of engine components.

1.2 Resonance at 2,000 rpm under load
The M3 has a characteristic resonance which occurs in a narrow rpm and load band. The resonance is directly related to the performance characteristics of the M3 engine and in keeping with the performance nature of the vehicle.
The driving conditions under which this resonance will be heard:
• Engine speed = 2,000 rpm
• Vehicle speed = approx 70-80 km
• Gear selected = 5th gear
• Road conditions = moderate incline

The resonance band is very narrow and can easily be avoided by reducing the load on the engine or bychanging down or up a gear depending upon the driving conditions.
Does anyone know what this 2,000 rpm resonance is supposed to sound like? Is it a clattering type sound?
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      02-05-2014, 01:35 PM   #68
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Pinging

Hey guys.I've just taken my car to the dealer the 3rd time now for pinging at low revs on 2nd and 3rd gear.First time round,the dealer said that a pipe from the manifold was replaced to solve the problem.The ping was still there.Second visit to the dealer.The spark plugs were changed.The ping was still there.Third visit to the dealer.Secondary air pump was replaced.Picking up the car from the dealer tomorrow.Keeping my fingers crossed!

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      02-10-2014, 01:23 PM   #69
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How did it turn out?
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      02-10-2014, 01:45 PM   #70
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Secondary air pump should have little to do with knock.
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