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Rear Main Replaced needs it again!


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24 replies to this topic

#1 OFFLINE   rjam

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Posted 10 November 2015 - 07:47 PM

I had the rear main replaced under warranty 5 months ago. Had an oil change found rear main leaking again. It has been only 5 months. Getting out of hand now with all the recalls and now the need to pull the engine and transmision for a second time. Love CMAX but this is a real problem! lt is warranty covered. I have 58k on the car.







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#2 OFFLINE   scottwood2

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Posted 11 November 2015 - 09:03 AM

Glad it is under warranty for you.  Hope they fix it this time



#3 OFFLINE   hybridbear

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Posted 11 November 2015 - 09:05 AM

I had the rear main replaced under warranty 5 months ago. Had an oil change found rear main leaking again. It has been only 5 months. Getting out of hand now with all the recalls and now the need to pull the engine and transmision for a second time. Love CMAX but this is a real problem! lt is warranty covered. I have 58k on the car.

What's a "rear main"?



#4 OFFLINE   Bill-N

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Posted 11 November 2015 - 11:25 AM

What's a "rear main"?

 

It's a seal around the crankshaft (the output shaft of the engine).  It keeps engine oil from leaking.

 

Typically, an engine will have two, one in front where the crankshaft comes out to power the belt used to drive things like the power steering pump, radiator fan, water pump, alternator, etc.  The other, the rear main seal, where the crankshaft emerges from the engine to attach to the transmission.  C-Max has only a rear seal since all the other stuff (e.g. power steering pump) is electrical.

 

Hope this helps.

 

PS:  There's also a "rear main" bearing, but they don't leak.


Edited by Bill-N, 11 November 2015 - 01:07 PM.

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#5 OFFLINE   FordService

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Posted 11 November 2015 - 01:14 PM

I had the rear main replaced under warranty 5 months ago. Had an oil change found rear main leaking again. It has been only 5 months. Getting out of hand now with all the recalls and now the need to pull the engine and transmision for a second time. Love CMAX but this is a real problem! lt is warranty covered. I have 58k on the car.

 

Hi rajames2,

 

I'm glad this repair will be covered; I know your dealership will do all they can to make sure you're back on the road again soon. Additionally, I can assist by pushing this up the line to your regional customer service manager (CSM). To make that happen, send me a private message with your full name, best daytime phone number, VIN, current mileage, and servicing dealership.

 

Crystal


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#6 OFFLINE   rjam

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Posted 11 November 2015 - 01:22 PM

Thanks for the description. A bit upset they are doing such a major repair twice in six months. This is one of those things that is rare to need replacement on a car with 48 K miles much less twice. I expect Ford should do more than say oops and tear the car down again. Don't flame me. I appreciate that it is under warranty. my concern is there is an underlying reason. the repair being done is treating the sympton not correcting the problem and in six months it will go out again. :)

#7 OFFLINE   BIG ROCCO

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Posted 11 November 2015 - 03:42 PM

Compared with the old days, rear main seals have become really, well designed and built and are usually trouble free.  I would suggest the dealer investigate the possibility of excessive crankcase pressure (defect in PCV system?  Engine oil overfill?)

 

Also, while there are no driven accessories off the front of the crankshaft, there is a front seal, for the harmonic balancer


Edited by BIG ROCCO, 11 November 2015 - 03:51 PM.

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#8 OFFLINE   rjam

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Posted 11 November 2015 - 04:32 PM

Thanks. I will ask them about both of those suggestions.

#9 OFFLINE   BIG ROCCO

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Posted 11 November 2015 - 06:34 PM

Thanks. I will ask them about both of those suggestions.

Engine oil overfill could be a result of the incorrect dipstick.  Also, any fluid (coolant? Fuel?) leaking into the crankcase would result in too high of a level and the crankshaft/connecting rods hitting the oil and causing frothing/foaming and increase in pressure.

 

PCV systems used to have a fairly large movable valve - nowadays a fairly small fixed orifice is common - not sure what the CMax engine uses, but if that valve/orifice is plugged, that will cause the pressure to rise and blow out seals.

 

Another cause of high crankcase pressure is excessive blow by past the rings...probably not the case at such low mileage, but it is possible if something broke like a ring or a piston land


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#10 OFFLINE   rjam

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Posted 11 November 2015 - 06:46 PM

Thank you Crystal. Your help is very much appreciated. I have sent you a PM with all the informatio.

#11 OFFLINE   rjam

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Posted 11 November 2015 - 06:48 PM

Hi
No contamination in any other fluids. I have the oil changed and fluids checked at my Ford dealer every 5K miles. Thanks for all the suggestions!

#12 OFFLINE   Bill-N

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Posted 11 November 2015 - 08:23 PM

Compared with the old days, rear main seals have become really, well designed and built and are usually trouble free.  I would suggest the dealer investigate the possibility of excessive crankcase pressure (defect in PCV system?  Engine oil overfill?)

 

Also, while there are no driven accessories off the front of the crankshaft, there is a front seal, for the harmonic balancer

 

Ditto (emphasis mine).



#13 OFFLINE   rjam

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Posted 11 November 2015 - 10:54 PM


Crystal did you get my PM? Had an issue with send.

Thank you Crystal. Your help is very much appreciated. I have sent you a PM with all the informatio.

#14 OFFLINE   FordService

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Posted 12 November 2015 - 11:33 AM

Crystal did you get my PM? Had an issue with send.

Thank you Crystal. Your help is very much appreciated. I have sent you a PM with all the informatio.


Thanks for letting me know! I don't see any messages from you in my inbox. I double checked, and my inbox isn't full yet, so you should be able to message me. :)

Meagan

#15 OFFLINE   rjam

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Posted 12 November 2015 - 03:55 PM

Thanks Meagan. My concern has been referred to the regional service manager for his help. I apparently got the pm thing all wrong.

#16 OFFLINE   FordService

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Posted 12 November 2015 - 06:39 PM

Thanks Meagan. My concern has been referred to the regional service manager for his help. I apparently got the pm thing all wrong.

 

No worries! :)

Meagan



#17 OFFLINE   rjam

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Posted 15 November 2015 - 04:39 PM

Got my car back Friday afternoon. They say they have no idea why the rear main gasket would fail not just once but twice. Looks like I will need to get rid of the car.

#18 OFFLINE   obob

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Posted 15 November 2015 - 08:15 PM

Got my car back Friday afternoon. They say they have no idea why the rear main gasket would fail not just once but twice. Looks like I will need to get rid of the car.

 

What's the deal ?  Are they buying it back rather than fixing it ?


Edited by obob, 15 November 2015 - 08:15 PM.


#19 OFFLINE   rjam

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Posted 15 November 2015 - 08:48 PM

I asked for a buyback. I was told they would give me an answer Monday. We shall see but I am not going to hold my breath. There is a cause for the failures and they are just putting a bandaid on it with no idea of the cause. The tone of the email from the area service manager sounded more like oh- well :(

#20 OFFLINE   ls973800

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Posted 16 November 2015 - 09:19 AM

You will have to check your lemon laws for the state you live in.  I highly doubt that a car with 58000 miles on it will be eligible because of a main rear seal having to be replaced twice.








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