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Old 04-24-2015, 11:52 PM   #1
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Crankshaft seal leaking

I have a 2004 SVT 2.0. The crankshaft seal was leaking so I decided to replace it. I took engine apart put new oil pump and crankshaft seal in and put all back together. Unfortunately crankshaft seal still leaks. Ugh! Any ideas?


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Old 04-25-2015, 12:16 AM   #2
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Seems odd.
What brand seal?
Motorcraft or SKF (who made the Motorcraft seals) are the only 2 I'd recommend using. SKF #14558.
No other brand will have the felt prefilter.
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Old 04-25-2015, 12:38 AM   #3
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Moved to General Tech Chat.
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Old 04-25-2015, 10:35 AM   #4
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Not sure what brand seal it was because it came on the melling oil pump I bought. I know it didn't have felt on it though, just rubber seal with spring retainer on inside.
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Old 04-25-2015, 01:33 PM   #5
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Wear on crank to make a leak groove or oil pump/cover mounted with seal not in exact center over crank to make it leak, why a specialty tool is needed to center the pump on crank. Or damage to seal itself installing all.
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Old 04-25-2015, 02:40 PM   #6
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What is the special tool? Where could I buy one?
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Old 04-25-2015, 08:38 PM   #7
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There isn't one. He's high.
I just put my oil pump back on. Just bolt it on and done. No special tools needed.

The rear main, yes you have to align. But the front seal you don't, it self aligns.
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Old 04-25-2015, 09:25 PM   #8
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Oh Funny. Well whatever I did didn't work so back to the drawing board for me.
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Old 04-26-2015, 05:21 PM   #9
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'I just put my oil pump back on. Just bolt it on and done. No special tools needed.'

Please.

Spare me.

Don't confuse luck with something else, you center and even more so due to the oil pump there. I'm getting pretty much convinced it's one reason why the pumps blow up at rpm. I understand why and not important if others don't or even realize a problem there. You have no idea of the things I do that others don't but not smart enough to know why they don't. I've done that for many years.

Like in the '70s running garbage cheap stock OEM type hydraulic lifters at over 7500 rpm when everybody else can't get over 6000 without 'anti-pumpup' lifters. Pretty funny. We NEVER used them in the race engines, no need for it.

There's clearance outer rotor to pump body, another outer rotor to inner rotor, and thirdly inner rotor to crank hub. Put that pump on blindly and all can be pushed to one side or the other to negate clearance on one side of the turning parts there and if the pump pushed sideways to then predispose the load to the open side of pump body with no support then inner climbs up on outer inside when outer tries to climb up on the end of the body support wall from lack of 360 degree support. Ford engineers asleep then. The fractional millisecond seizure would result in breakages exactly like picced here and there when somebody breaks one. Picked up the trick with C3 ATX-not do that on one of them and instant junk (they break exactly the same way as these pumps do) in five minutes or five weeks, no pump piloting/centering just like on these, the idea works the same. The degree of off-center determines the wear/breakage rate. How lucky are you today?

Even the lowly Haynes manual gives a less than stellar way of lining the pump up at least better than simply bolting it down.

I virtually guarantee Ford uses a centering tool on the line assembling the motors, like every other engine made since the '60s, it adds speed on the line and durability to the motors.

You have slop in the bolt holes and cover can be anywhere just EXACTLY like the rear seal and why one would line that but not the front especially with the front having the pump in it? You got me, I would center them both and could care less what the service manual says. The pump rotors possibly dragging are far more important than a seal off center, solid parts that will fail instantly if they hit at all and blow up the motor if unlucky. A seal intentionally more than touches the ID, it is smaller to impinge on the OD of the rotating shaft, it is INTENDED to rub there to work. Like .030" of overlap there. As long as overlap is still there a seal can even be off center and still seal fine.

Nobody said we had to be smart about it did they?
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Old 04-26-2015, 06:36 PM   #10
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So what can I use to center the pump and seal? Where do I get the tools I need?
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