Question about 1993 BMW K 1100 RS

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NOISE FROM ENGINE ON START UP - 1993 BMW K 1100 RS

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Hi, Lordbyron_5 I just loaned my brand new pair of listening ears to your local dealers chief technician so he could take your bike for a test ride and give you his professional opinion and estimate about your noise and repair cost. For more information about your issue, please visit the websites below. Good luck and have nice a day.
http://forums.bmwmoa.org/showthread.php?38430-K1100LT-Engine-Knock-when-Cold
http://www.i-bmw.com/showthread.php?t=46449
http://www.rbracing-rsr.com/downloads/K1100LT_RS_Repair.pdf
BMW Motorcycle Parts Fiche OEM BMW Motorcycle Parts online 1970 present BMW
http://www.bmw-motorrad.com/us/en/index.html?content=http://www.bmw-motorrad.com/us/en/services/manuals/manuals_main.html¬rack=1

Posted on Dec 29, 2015

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Posted on Jan 02, 2017

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old post.zero help, so here i am, filling the hole for next person.

the V6 has no cam belt. it's a chain drive.
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the hydraulic adjusters may not, when not doing oil changes on time.
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Hi , i got a 1994 316I bmw , n am facing a silly problem with the engine noise in the morning .. when i start up the engine i hear a knocking noise then when the car starts to warm up the noise fades...


What you need to do is find the are that the noise is coming from. Next time you start in the morning, pop the hood first. start the car and get out and listen for the noise. Is it coming from the top or the bottom of the engine. You will have to get down to listen for the bottom. Top engine noise is usually from the lifters. They get dirty and partially collapse. They do have stuff called valve medic, thats helps clean these up. Bottom end noise Is the rod /main bearings. These can only be replaced. Basically an engine rebuild or replace.

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Infiniti G35 - 2006 Sedan - 37,000 miles. Knocking noise in engine area: Happens only in gear (drive or revese); loudest after engine is warm; took vehicle to dealer twice. First time, changed engine oil...


Smoke on start? Could be a valve problem where all your oil is in the bottom at start? Belts are squeaking too? Maybe a tensioner went bad?

Saw this service bulletin---

TAPPING / KNOCKING NOISE FROM ENGINE AT COLD START
This bulletin amends ITB02-049. This version amends the Applied Vehicles.
Please discard all paper copies of the earlier version.
APPLIED VEHICLE: 2002 - 2004 Q45 (F50)
2003 - 2004 M45 (Y34)
2003 - 2004 FX45 (S50) with V8 engine.
IF YOU CONFIRM:
A tapping or knocking noise (similar to a piston or valvetrain noise) when starting a cold engine,
NOTE: The engine is considered “cold” when it has been OFF (not running) for several hours.
ACTIONS:
1. Dislodge and remove any carbon deposits that may have caused the noise and confirm that carbon
deposits were the cause of the noise.
• While the noise is occurring, quickly rev the engine several times to approximately 4,000 RPM. Then
release the accelerator quickly, as soon as the engine reaches 4,000 RPM.
• The noise should disappear immediately if carbon deposits are the cause.
NOTE:
• If the customer reported a noise that exactly matches the symptoms listed above, but you cannot
duplicate it, the cause may still be carbon deposits. Go to step 2.
• If the noise does not stop after revving the engine, or you observe any other noise that doesn’t match
one described above, go back to ASIST for further diagnostic and repair information.
2. To prevent this incident from occurring again, add a bottle of Nissan In-Tank Fuel System Cleaner
P/N 999MP-FSC00P to a full tank of fuel (in the vehicle’s fuel tank) according to the instructions on the
label.
• This product is proven to reduce carbon deposits on pistons and combustion chambers, as well as
cleaning other components of the fuel system.

Hope helps.

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1. How many miles on your car?

2. Is the engine hot, when you try to start the car?

3. Is the engine hot, when you heared the knock noise?

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