front crank seal leak on an n54
08-08-2015, 03:47 PM
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My Ride: 08 550i sport. n62tu
front crank seal leak on an n54
Back in January I had this car come in. The belt slipped off, shredded and went through the crank seal, into the oil pan etc etc.
I put a new crank seal on, removed the pan, cleaned all the crap out, new belt. Yesterday, 7 months later, 2600 miles later it came back. The front crank seal is not just leaking, but pouring. So I pull off the crank pulley, everything looks fine. No damage, no gaps, nothing. So I installed a new crank seal. I used the bmw tools to remove and install the seals. I used the proper primer and sealer to fill the grooves on the side and it leaks just as bad.
The weird part is, it only leaks after driving. You can Rev it up on the lift, let it idle for an hour and not one drop. But, drive it just around the block and it's dripping on the floor. I'm stumped... any ideas? I would think if the crankshaft had play, you would hear it. Obviously the large center bolt isn't loosen or it'd be out of time. This is going to drive me crazy all weekend knowing this car is sitting on my lift waiting for me on monday.
I put a new crank seal on, removed the pan, cleaned all the crap out, new belt. Yesterday, 7 months later, 2600 miles later it came back. The front crank seal is not just leaking, but pouring. So I pull off the crank pulley, everything looks fine. No damage, no gaps, nothing. So I installed a new crank seal. I used the bmw tools to remove and install the seals. I used the proper primer and sealer to fill the grooves on the side and it leaks just as bad.
The weird part is, it only leaks after driving. You can Rev it up on the lift, let it idle for an hour and not one drop. But, drive it just around the block and it's dripping on the floor. I'm stumped... any ideas? I would think if the crankshaft had play, you would hear it. Obviously the large center bolt isn't loosen or it'd be out of time. This is going to drive me crazy all weekend knowing this car is sitting on my lift waiting for me on monday.
08-09-2015, 05:45 PM
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My Ride: e60
but would love to know how this turns out. Please post and update
08-16-2015, 03:36 PM
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My Ride: 08 550i sport. n62tu
Either way, there's your answer
08-18-2015, 08:35 AM
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Based on the amount of oil present under the car on the original visit, this problem was already there. They just wanted it fixed for free because they paid for an oil filter housing, valve cover and oil pan gasket. (Which were all leaking as well as removed for removal of belt debris)
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thesalboy
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04-08-2015 09:13 AM
