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Author Topic: Removing crankshaft gear. Serious leak from behind!!  (Read 2144 times)

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Offline fastfred

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Removing crankshaft gear. Serious leak from behind!!
« on: December 14, 2014, 07:29:41 PM »
My 1977 Pinto 2.3 suffered a serious leak today.  There must be a seal behind the crankshaft gear?  Pulley on crank came off ok. Have it stripped down but the gear on the front of the crank seems tight. Is it a sliding fit?
 Any ideas on removal and there must be a seal behind it?  Oil has contaminated the nearly new cam belt so it will have to be replaced.  Any help will be appreciated.
Thanks in advance.

Offline amc49

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Re: Removing crankshaft gear. Serious leak from behind!!
« Reply #1 on: December 14, 2014, 09:54:33 PM »
I've seen them slide off and seen them stuck to need a puller but not hard. Yes, there is a seal behind it. If belt is newly contaminated then you can rinse it in gasoline and then rubbing alcohol to pull the gas out and let it dry and reuse it. It needs to go back on running in the direction it was already running in but if you can't remember or cannot tell from markings then run it any way, just will run a bit longer in correct direction.

Offline fastfred

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Re: Removing crankshaft gear. Serious leak from behind!!
« Reply #2 on: December 15, 2014, 08:48:45 AM »
Thanks AMC49.  There isn't any room behind the gear to get a puller in there.  Maybe a special one is needed. I have several but will try.  I will replace the cam belt as they are cheap.  I did the water pump and thermostat not long ago but use a 180 degree thermostat.  The 195 one had my motor a little too warm in the summer.

The seal blew in a very short time!

On Saturday I modified the secondary choke to kick in earlier then before and what a difference it made!  Holley 5200.

Thanks for the reply.  Fred

Offline dick1172762

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Re: Removing crankshaft gear. Serious leak from behind!!
« Reply #3 on: December 15, 2014, 10:22:01 AM »
If your seal is leaking big time, its more than likely the seal was off center in relation to the crankshaft. There is a tool that should be used to put the seal on center before you tighten the cover bolts. There is a lot of wiggle room in the front cover before you tighten up the cover. The gear if not loose must be removed with a tool that splits down the middle to reach the back side of the gear. The last time I saw one for sale on E-bay it was over $100. The proper tools are a must on this repair. LOL
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Offline fastfred

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Re: Removing crankshaft gear. Serious leak from behind!!
« Reply #4 on: December 15, 2014, 10:40:09 AM »
Thanks for the input Racer.  Will see what I can do to remove it.  Have a number of different pullers from various motorcycles I have.  Fingers crossed X.  I have had the car for over 7 years and this is the first seal to go.

Fred

Offline dick1172762

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Re: Removing crankshaft gear. Serious leak from behind!!
« Reply #5 on: December 15, 2014, 01:56:06 PM »
Are you sure its the crankshaft seal? Are you going by the puddle under the crank or is ever thing else dry. Reason I ask is because the cam seal will leak 9 times out of ten. They leak because the bolt was not sealed properly and since the cam has oil pressure in side of it, they will leak. Follow the trail of oil. Hope I'm right cause that seal is simple to fix. By the way, all three seals are the same.
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Offline fastfred

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Re: Removing crankshaft gear. Serious leak from behind!!
« Reply #6 on: December 15, 2014, 03:41:19 PM »
Thanks for the reply Dick.

Good question as the leak was severe and hit the fan which threw oil onto the under hood big time.   Seems to be more oil at the bottom of the timing belt enclosure but that is gravity.  Doesn't seem a lot under the cam sprocket area.

Managed to remove the crank gear after about 3 hours, it was tight and a red solution was on the surface. Is the metal disc that guards the seal flat or dished?

The new seal came with 2 gaskets that go behind the cover behind the seal and onto the oil sump.  Won't be needing those.

Getting there.   Thanks folks.  Fred

Offline dick1172762

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Re: Removing crankshaft gear. Serious leak from behind!!
« Reply #7 on: December 15, 2014, 04:57:12 PM »
Dished and will only work one way.
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Offline fastfred

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Re: Removing crankshaft gear. Serious leak from behind!!
« Reply #8 on: December 15, 2014, 07:04:59 PM »
Hey dick.

One more query.  When I took this apart the dished washer was behind the crank gear and next to the crank seal.  I have a diagram which shows the dished washer goes onto the crank after the gear does?

Which is correct?

Cheers   Fred

Offline Srt

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Re: Removing crankshaft gear. Serious leak from behind!!
« Reply #9 on: December 16, 2014, 03:43:06 AM »
Hey dick.

One more query.  When I took this apart the dished washer was behind the crank gear and next to the crank seal.  I have a diagram which shows the dished washer goes onto the crank after the gear does?

Which is correct?

Cheers   Fred


not sure about the 2.3 but IIRC on a 2.0 it goes on AFTER the gear.  2.3 most likely the same.  I defer to those who (of whom there are many!) more familiar with the 2.3
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Offline amc49

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Re: Removing crankshaft gear. Serious leak from behind!!
« Reply #10 on: December 16, 2014, 05:18:15 AM »
Dished washer goes in FRONT of the crank sprocket not behind, the one on CAM goes in BACK of sprocket, between the two they stop belt from drifting either way. Dish washer is a belt guide. The crank washer concave, or dish out curve, faces out.

The specialty tools Dick mentioned are for if the cover itself is removed, enough slop in holes to allow it going back on with the seal not concentric with crank nose, it then leaks instantly or very quickly. I've replicated the expensive tool by using say 3 new drill bits closely sized to the gap there with no seal in cover and then build up the rest at the drill bits with feeler gauge pieces until all 3 bit locations are tight and even, the cover will be centered to within .002" or so and run fine then. Tighten down cover bolts carefully then remove drill bits/feelers and then install crank seal. Same idea works beautiful on re-aligning ATX C3 pump body to cover on these too. On that can save tearing up transmission big time.

Offline fastfred

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Re: Removing crankshaft gear. Serious leak from behind!!
« Reply #11 on: December 16, 2014, 08:29:36 AM »
Interesting stuff folks!  I come onto this site at least once a week and only post when I need to.  I read a lot of the posts though.

Making a shim only last Saturday to have the secondary choke come in to play when it should certainly boosted the acceleration big time.  It was only just starting to open when the primary was nearly fully open.  According to my books it should begin to open when primary is at 45 degrees.   Holley 5200.

Now that I have this all apart it makes me want to install a cam with a bit more bite....LOL..

My years with vintage motorcycles helps a lot!   Thanks.

Cheers Fred