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crankshaft front oil seal

 
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Old 04 Sep 2011, 03:31 pm
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Default crankshaft front oil seal

A little while ago I posted this thread about an oil leak on my 2002 PT Limited. oil leak I took the car back in and they said it is the crankshaft front oil seal. They are having a hard time getting crankshaft sprocket off, and said it looks like it has worked it's way backwards toward the seal. The washer may be worn and damaged the seal, and/ or just the seal is bad. They are also worried about excessive play in the crank shaft causing the sprocket to move back (read: new or rebuilt engine $$$$$) My question is: They had just 2 months prior to this happening, had the whole front of the engine apart and done the timing belt, water pump etc. Is there any way they could have caused this problem when they were in there the first time? The engine has 100,000 miles on it and had run like a top till we had the timing belt done . . . . . . I have brought up the possibility and of course the answer is no . . . . What do you think?

Nick
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Old 04 Sep 2011, 06:54 pm
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Default Re: crankshaft front oil seal

I highly doubt they messed up your crank seal when doing the timing belt. It's behind the crank sprocket and would be hard to do. I have heard of thrust bearing failure before on the 2.4 but is not very common. I would have them measure crankshaft endplay and if out of spec, nothing you can do except tear down the engine.
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Old 04 Sep 2011, 07:17 pm
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Default Re: crankshaft front oil seal

That is exactly what they said they would have to do, measure the endplay. If it is out of spec, rebuild or replace . . . . . ouch!
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Old 04 Sep 2011, 09:04 pm
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Default Re: crankshaft front oil seal

You have to use a special tool to remove the crank sprocket. What shop is this that doesn't even have the correct tool?

The timing belt will have to come out to change that seal. Even if the crank isn't damaged, this is going to be a very expensive repair.
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Old 05 Sep 2011, 05:24 pm
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Default Re: crankshaft front oil seal

While it's true that crank play isn't the most common engine issue on these cars, it's by no means uncommon.

Worst case senario, you have play in your crank and will need an engine replacement/rebuild.

Best case senario, you simply have a bad seal.

We had a 2008 Touring with 38k miles in our shop about 6 months ago that had the crank start moving back and forth and blew out the front main seal. Not very abnormal at all.
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Old 06 Sep 2011, 02:03 pm
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Default Re: crankshaft front oil seal

Although this is a precise measurement, I usually just pry in and out on the pulley with mild force, and look for play.

You can buy a thrust bearing,
You need no special tools to remove either the pulley or timing gear from
2.0 OR 2.4.
Use a simple 3/2 Jaw craftsman for pulley



The gear comes off with a steering-wheel puller, you need long M6x1 bolts,
coil bolts are too short for most pullers.

I've done many, many pulley's and gears.

You can have crank welded if it's grooved.
If more is needed, crankshaft supply will sell you one with correct bearings
/exchange

or

you can just get one from any older 2.4, there are MANY, MANY of these
available in JY, they are a 'lifetime' part generally. No failure rate.

Next,
you'd want to know why it failed, if the torque converter 'bolloned', or some one's holding the clutch in at extreme RPM's (unlikely in non-
race applications)
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