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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 11-15-2015, 10:49 AM
Cjponto Cjponto is offline
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M62 engine

If the timing chain breaks is the engine shot?
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  #2  
Old 11-15-2015, 12:14 PM
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QSilver7 QSilver7 is offline
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Is this in reference to the M62 being an interference or non-interference engine? If so, this question has been bantered around e38/e39 forums for a decade or more. Just do a simple google search "is BMW m62 an interference or non interference engine"...and you should get lots of results of old posts that ask this same question or threads that discuss broken chain guides or timing chain work...and what happened to the engine.

Good luck.
Many engines are designed such that the valves can collide with each other or the top of the piston, should the belt or chain fail, and the cams and crankshaft lose synchronization. This is known as an interference engine and is a compromise of performance and failure likelihood and consequences.
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  #3  
Old 11-15-2015, 12:31 PM
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Cabover1000 Cabover1000 is offline
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Quote:
Originally Posted by Cjponto View Post
If the timing chain breaks is the engine shot?

If it is shot or not depends on how much money you have. It would need new heads and valves
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  #4  
Old 11-15-2015, 02:30 PM
edjack edjack is offline
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I've not heard of the chain breaking; it lasts the life of the engine.

The guides can disintegrate and cause a lot of noise. Complete guide failure may allow the valves and pistons to make contact. So, if you continue to operate the engine, you may sustain big buck damage.
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Old 11-15-2015, 06:00 PM
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Quote:
Originally Posted by edjack View Post
I've not heard of the chain breaking; it lasts the life of the engine.

The guides can disintegrate and cause a lot of noise. Complete guide failure may allow the valves and pistons to make contact. So, if you continue to operate the engine, you may sustain big buck damage.

The chain on my m60 was broke when I bought it. I wonder it it was caused by the loose roaming oil pump bolt that was in the bottom of the oil pan, or the guides giving out. Had to have taken a lot of force to break the dual row chain on that motor.
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1993 740il chipped, 6 speed swap!
1997 Range Rover HSE 4.6
1986 F-250 diesel 6.9
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1947 kb-5 international
parting out/ scrapped
1998 540i sport
sold
1999 528i sport premium
1997 540i premium
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Old 11-15-2015, 06:50 PM
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Tutti57 Tutti57 is offline
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Very good chance of valve damage if it broke but I just fixed my Passat chain after the timing adjuster sprocket slipped, throwing the cams out of time and stalling the engine. I was lucky that I just had to retime it and not pull the head.

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  #7  
Old 11-16-2015, 01:55 AM
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Shot.... no.... damage and wont run again with out thousands of dollars... YES


No way around it.. If there is any variation in the chain in anything other then 3 or 4 degree (less then one tooth)
*thats about its min and max timing advance and retard (+/-5degree)

physical damage occurs rending the motor none operable

At the least your pulling the front of the motor.. the top of the motor.. and the main timing chain,
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Old 11-16-2015, 01:57 AM
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Call it 5 grand... and youll have money left over for beer
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