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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 12-04-2011, 01:31 PM
EddieAdams EddieAdams is offline
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Coolant leak location found

Been having coolant leak for a while and after removing a few covers off the engine, I found lots of coolant sitting on a section of the engine on the driver's side. Please see pictures. Looks like it is collected along the entire lenght of the engine block. What could the source of this be? Some hose? a gasket?

I'm taking the car tomorrow to have valve and timing cover gaskets replaced. Do you think that while the gaskets are getting replaced, it would be easy to access and repair the area of the cooland leak?

Thanks!
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  #2  
Old 12-04-2011, 05:41 PM
HerbP HerbP is offline
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I don't know why you would have any coolant in that area, unless it might be the coolant pipe problem. It is possible that a hose could be spraying coolant to that area, but the outcome does not look good. I hope the best for you, but you could be looking at a very big repair.


Good Luck!
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  #3  
Old 12-04-2011, 06:16 PM
EddieAdams EddieAdams is offline
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I don't think it's the coolant pipe. Nothing is coming out of the weep hole on the front of the engine
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  #4  
Old 12-04-2011, 09:28 PM
Keif Keif is online now
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Check the coolant vent hoses that go from the coolant reservoir to the inner part of each head (under either side of the throttle body). If not them, look at the plastic tube between the water pump and valley pan. Vacuum out coolant and see if leaking from around perimeter of valley pan. Lastly, check coolant pipes coming out of the firewall behind the intake manifold.

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  #5  
Old 12-04-2011, 09:38 PM
Khabar Khabar is offline
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hello

Bro did u get my pm?
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  #6  
Old 12-07-2011, 09:18 AM
EddieAdams EddieAdams is offline
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Machanic called and said the leak was due to pressrue buildup in the valley. He said someone had put silicon on a screw and inserted it deep into the weep hole, which over time caused the area inside to flood and coolant evetually found its way out from another location. Does this make sense?

Mechanic said he'll e-mail me a pic of the screw in the hole
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  #7  
Old 12-07-2011, 10:36 AM
HerbP HerbP is offline
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In other words, they made it your problem! I would go back after them. That is fraudulent!


Good Luck!
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  #8  
Old 12-07-2011, 03:06 PM
Khabar Khabar is offline
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no really there is small hole in block for coolant. it can be a silicon instant of valley pan gasket, but who would take off intake manifolder with out any reason? New valley pan comes with gasket on it. how many miles on your car?
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  #9  
Old 12-07-2011, 04:14 PM
EddieAdams EddieAdams is offline
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Quote:
Originally Posted by Khabar View Post
no really there is small hole in block for coolant. it can be a silicon instant of valley pan gasket, but who would take off intake manifolder with out any reason? New valley pan comes with gasket on it. how many miles on your car?
Khabar,

Not sure I understand what you're saying.
Its got 99K miles. Bought it just a few months ago because it's an extermely clean car inside and out.

Mechanic will replace:

1. upper timing gaskets
2. valve cover gaskets
3. spark plug tubes
4. intake manifold gaskets
5. valley pan and coolant pipe kit

All for about $2,100. Don't know if it's fair or not.
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  #10  
Old 12-07-2011, 04:38 PM
HerbP HerbP is offline
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That is a fair price in my opinion. There is around 850 in parts, & the balance in labor. I would say he will have 15 to 20 hours labor, if he has done this before. I would consider changing the plugs & alternator o-ring while he is at it. After this, you should be good for a while.
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  #11  
Old 12-07-2011, 04:59 PM
EddieAdams EddieAdams is offline
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Quote:
Originally Posted by HerbP View Post
That is a fair price in my opinion. There is around 850 in parts, & the balance in labor. I would say he will have 15 to 20 hours labor, if he has done this before. I would consider changing the plugs & alternator o-ring while he is at it. After this, you should be good for a while.

Thanks Herb. Is there additional labor involved for replacing the plugs and alternator o-rings?
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  #12  
Old 12-07-2011, 06:13 PM
HerbP HerbP is offline
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The plugs would be very little, with very good access to them. The alternator 0-ring would probably be 750.00 to 1000.00. After all work is done, I would change the oil as a preventive measure after running the engine some. You just want to get any foreign objects out of the system.

Good Luck!
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  #13  
Old 12-07-2011, 07:41 PM
EddieAdams EddieAdams is offline
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Quote:
Originally Posted by HerbP View Post
The plugs would be very little, with very good access to them. The alternator 0-ring would probably be 750.00 to 1000.00. After all work is done, I would change the oil as a preventive measure after running the engine some. You just want to get any foreign objects out of the system.

Good Luck!
750-1000 on top of the $2100? I was hoping since half the engine will be torn apart, they would be able to get to the o-ring will minimal time and effort.
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  #14  
Old 12-08-2011, 07:23 AM
HerbP HerbP is offline
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The o-ring is below the exhaust on the drivers side. Nothing they do will help replacing the o-ring any easier.
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  #15  
Old 12-08-2011, 07:54 AM
EddieAdams EddieAdams is offline
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I'll go with your advice... Mechanic indicated he'll replace the alternator o-ring for $200 on top of all other work being done. The o-ring itself is only $5.
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  #16  
Old 12-08-2011, 11:02 AM
EddieAdams EddieAdams is offline
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It seems before I took the car to the mechanic, I was looking in the wrong place thinking it's the weep hole (see first pic). Today, the mechanic showed me the plugged weep hole (see second pic). Last pic shows the flood caused by the failure of coolant pipe seal.
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  #17  
Old 12-08-2011, 05:19 PM
Khabar Khabar is offline
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it was weep hole leaking? 2200 it good price. + 800 for parts? I changed water pump on mine while installing bimmer pipe i just wanted to be safe.
Quote:
Originally Posted by EddieAdams View Post
It seems before I took the car to the mechanic, I was looking in the wrong place thinking it's the weep hole (see first pic). Today, the mechanic showed me the plugged weep hole (see second pic). Last pic shows the flood caused by the failure of coolant pipe seal.
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  #18  
Old 12-08-2011, 05:48 PM
HerbP HerbP is offline
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BMW antifreeze is not green. Let this be a lesson to anyone who might use anything but BMW antifreeze. It is just not worth the risk. I am not saying that this caused the failure, but it could certainly help contribute to it.

Glad you found the problem!

Good Luck!
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  #19  
Old 12-08-2011, 05:49 PM
HerbP HerbP is offline
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Quote:
Originally Posted by EddieAdams View Post
I'll go with your advice... Mechanic indicated he'll replace the alternator o-ring for $200 on top of all other work being done. The o-ring itself is only $5.

Great Price!
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  #20  
Old 12-08-2011, 06:00 PM
EddieAdams EddieAdams is offline
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Quote:
Originally Posted by Khabar View Post
it was weep hole leaking? 2200 it good price. + 800 for parts? I changed water pump on mine while installing bimmer pipe i just wanted to be safe.
Khabar,

Leak was not coming from the weep hole because it was sealed shut. The mechanic said because of that the continuous coolant leak into the valley caused it to fill up and the pressure buildup eventually made it escape through the manifold (I think) gasket on the driver side.
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  #21  
Old 12-08-2011, 07:36 PM
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745on22s 745on22s is offline
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weep hole was leaking thus some1 plugged it and sold the car to you smh!!!
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  #22  
Old 12-08-2011, 08:04 PM
EddieAdams EddieAdams is offline
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Quote:
Originally Posted by 745on22s View Post
weep hole was leaking thus some1 plugged it and sold the car to you smh!!!
Yes! The seller is a licensed dealer here in NJ, but without an actual car lot. Not sure if it was him or someone before him that had done that though.
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  #23  
Old 12-08-2011, 08:11 PM
Khabar Khabar is offline
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cooling pipe has 2 O ring on both ends.

BWM dose not manufacture antifreeze they use only BMW name on it. Weep hole more likely related to heat and rubber quality than type of antifreeze is used. If it is antifreeze than why rest of rubber hoses of cooling system do not leak? There are 2 O rings on cooling pipe rone cause weep hole problem , the other is on opposite end of the pipe. I tool both of them out and rear one looks like brand new,but it comes to contact with antifreeze as well. How is that possible?
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