Front crankshaft seal leak? - Diesel Forum - TheDieselStop.com
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Power Strokes 1994-1997 General Technical discussion of topics related to vehicles powered by the Power Stroke engine in 1994 through 1997 models.

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Old 08-30-2007, 10:30 PM   #1 (permalink)
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Front crankshaft seal leak?

Seems that my front crank seal is leaking pretty good. It leaks enough oil that I go through a number of quarts in between oil changes. I beleive most of this is leaking and not burning.

The local diesel shop quoted me 12+ hours to pull the motor to replace this seal. Is there any other way to do this? Its a very anoying leak....seems to leak just enough that im embarassed to park on fresh pavement! Any other options?

1997 F-350 PSD 4X4 CC 176K I depend on this truck for my daily driver.
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Old 08-31-2007, 06:53 PM   #2 (permalink)
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Re: Front crankshaft seal leak?

Your oil pump is in the front behind the harmonic balancer.
Not sure, I'll have to look it up, but I thinks it can be pulled with out removing the engine. Just pull the harmonic balancer and four bolts and the pump is off and a new seal can be installed on you work bench.

Don't place your bets on it yet though, I don't have a manual with me to check, and i haven't done it before, I not sure how the pickup tube is attached either.

I'll have to get back to you after I get back to the shop.

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Old 08-31-2007, 07:26 PM   #3 (permalink)
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Re: Front crankshaft seal leak?

I have a front end leak too. It acts like an old VW, it leaks one or two drops everytime I shut it off. Even that is too much for me, so I have been looking into it. Your mechanic is either gouging you or not experienced in the 7.3 PSD. He must think the pan has to come off. The harmonic dampener comes off like any automotive one, has a seal behind it like any automotive one. The oil pump is behind the dampener, and the seal is in the front of the oil pump. There is also an oring between the oil pump and front cover that could be it. I'm not positive my leak is not the oil pan to front cover seal, I havent proved it out yet. Good luck!
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Old 08-31-2007, 08:24 PM   #4 (permalink)
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Re: Front crankshaft seal leak?

I have read that the the pickup tube is attached there in some form and you cant work, but maybe Im wrong and missunderstood. [img]/forums/images/%%GRAEMLIN_URL%%/confused.gif[/img]
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Old 08-31-2007, 09:07 PM   #5 (permalink)
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Re: Front crankshaft seal leak?

Ok, I looked it up , the pickup tube is attached to the front cover and not to the oil pump, so the pump can be removed.

Or like GM said you can do it on the truck. I would pull the whole thing and replace the o-ring while I'm in it that far, its 4 bolts and the seal can be driven in on your workbench vs under the truck.

FYI, the bolt torqe specs for the oil pump to cover are 8-13 ft-lbs.
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Old 08-31-2007, 09:20 PM   #6 (permalink)
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Re: Front crankshaft seal leak?

Check the crankshaft & make sure you don't need a sleeve....
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Old 09-01-2007, 01:08 AM   #7 (permalink)
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Re: Front crankshaft seal leak?

No wear sleeve on the crankshaft, it is on the balancer, and a new wear sleeve is included with the front seal kit and should be replaced with the front seal.

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Old 09-01-2007, 04:12 PM   #8 (permalink)
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Re: Front crankshaft seal leak?

Is ford the best place to get the front seal kit? If the motor does not have to be pulled I can do the work myself. I have taken the front engine cover off many times on a 5.9 cummins to tab the dowel pin that has issues.
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Old 09-01-2007, 06:00 PM   #9 (permalink)
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Re: Front crankshaft seal leak?

Ford or your local International dealer are two places to get the seal kit, IIRC, it costs around $15-30 for the kit from either place.

The engine does not have to be removed to replace the front seal, remove the radiator to gain some additional room if needed to remove the balancer, and I will usually remove the oil pump cover as well to inspect the pump and front cover for any scoring & irregular wear, so you should pickup the orange o-ring seal for the cover also. The new front seal can be installed with a large flat piece of steel to drive it in square, and a piece of tubing or inner bearing race can be used to drive on the new wear sleeve onto the balancer, also take note there is a specific direction to install the sleeve, so be sure to read the instructions that come with the seal kit.

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