Timing chain on S62 broke... - BMW M5 Forum and M6 Forums
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post #1 of 54 Old 24th December 2009, 11:36 PM Thread Starter
Maximos
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Timing chain on S62 broke...

There is an opportunity to purchase an M5 with a broken timing chain at a good price. According to him, the owner was driving when the car stopped. He tried starting it again, which didn't work, and had it towed to the local German auto shop. He was quoted $3,500 for the replacement of the chain. He claims inability to fix it due to financial hardship. I should mention that NICB reports that car has a salvage title, but I haven't seen an actual history report on the vehicle.(-if anyone has a spare report, PM me for the VIN... would be much appreciated )

I have a few questions:
1. What could have caused this to happen?

2. Is this a DIY job in any way?

3. Is the $3,500 figure accurate?

4. Could this have caused major damage to the engine itself? I have located a replacement engine for $4k after receipt of the older engine. In the case that a replacement is needed, how much should the procedure cost?

I have not seen pics of the car yet, but apparently it is a one-owner car in very good condition...

Thanks for the help.

Last edited by Maximos; 25th December 2009 at 12:00 AM.
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post #2 of 54 Old 24th December 2009, 11:44 PM
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Quote:
Originally Posted by Maximos View Post
There is an opportunity to purchase an M5 with a broken timing chain at a good price. According to him, the owner was driving when the car stopped. He tried starting it again, which didn't work, and had it towed to the local German auto shop. He was quoted $3,500 for the replacement of the chain. He claims inability to fix it due to financial hardship. I should mention that NICB reports that car has a salvage title, but I haven't seen an actual history report on the vehicle.

I have a few questions:
1. What could have caused this to happen?

2. Is this a DIY job in any way?

3. Is the $3,500 figure accurate?

4. Could this have caused major damage to the engine itself? I have located a replacement engine for $4k after receipt of the older engine. In the case that a replacement is needed, how much should the procedure cost?

I have not seen pics of the car yet, but apparently it is a one-owner car in very good condition...

Thanks for the help.
Is it the main timing chain? 3500 sounds about right, much needs to come of in order to change the main chain
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post #3 of 54 Old 24th December 2009, 11:59 PM Thread Starter
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Yes, I suppose that's why he can't afford to get it fixed. I'm guessing the valves are bent since he tried starting it after the chain broke, which might mean the cylinder heads are bad...

Last edited by Maximos; 25th December 2009 at 12:01 AM.
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post #4 of 54 Old 25th December 2009, 12:00 AM
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If the chain broke while the vehicle was running then expect to be replacing more than just the chain. Generally when timing belts/chains snap pistons meet valves.

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post #5 of 54 Old 25th December 2009, 12:03 AM Thread Starter
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Originally Posted by jt2ma71 View Post
If the chain broke while the vehicle was running then expect to be replacing more than just the chain. Generally when timing belts/chains snap pistons meet valves.
From my understanding, the S62 is a non-interference engine, which means that the pistons wouldn't be damaged. Either way, replacing the chain is only $500 less than getting a different engine, not including any messed up valves, cylinder heads, etc.
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post #6 of 54 Old 25th December 2009, 12:04 AM
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The parts(like pistons and valves) are not that expensive,but the labour is quite alot(so expensive).
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post #7 of 54 Old 25th December 2009, 12:21 AM
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Quote:
Originally Posted by Maximos View Post
From my understanding, the S62 is a non-interference engine, which means that the pistons wouldn't be damaged. Either way, replacing the chain is only $500 less than getting a different engine, not including any messed up valves, cylinder heads, etc.
Really? Non interference? That surprises me if true.

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post #8 of 54 Old 25th December 2009, 12:25 AM Thread Starter
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Really? Non interference? That surprises me if true.
I'm not 100% sure, but I read it on this forum. Like I said, I've located a replacement and am just trying to weigh my options to see if repairing this car will be worth it in the end.

Last edited by Maximos; 25th December 2009 at 12:27 AM.
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post #9 of 54 Old 25th December 2009, 12:32 AM
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Quote:
Originally Posted by Maximos View Post
I'm not 100% sure, but I read it on this forum. Like I said, I've located a replacement and am just trying to weigh my options to see if repairing this car will be worth it in the end.
How well do you know the car and how much do you know about the replacement motor? How much to install the motor? Doing a clutch while you are in there? Mileage? Other worn parts, like suspension?

And then, once it is together, if there is anything else wrong, your nickel. Of course, you may be able to part out some of the blown motor. So, fair amount of risk depending on what you know; if the risk is not too great, or the price justifies the risk, then go for it.

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post #10 of 54 Old 25th December 2009, 12:45 AM Thread Starter
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According to the owner, the car just had a new clutch, radiator, and fuel pump installed. I've had quotes from $1,500 (mediocre shop) to $2k (high end shop) for the replacement. The replacement has a 3 month warranty on it. If the car does indeed have a salvage title, and since its obviously in need of major engine repair or more like replacement, I think I'd get it real cheap, but then I have to consider if the car is actually worth repairing due to the supposed salvage title...

Last edited by Maximos; 25th December 2009 at 12:46 AM.
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