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Old 09-29-2009, 04:10 AM
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timing cover seal

i finally got my re-build sbc 400 running, and noticed that it leaks quite much oil... i suspect that i just installed the seal somehow incorrectly and need to replace it.

or, is it possible that it settles by its own after a while?

i need to chance the oil soon anyway.. might as well change the seal same time.

first engine i rebuild, so just asking.. thanks.

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Old 09-29-2009, 04:41 AM
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Do you mean this seal;
http://www.jegs.com/i/Mr.+Gasket/720/18/10002/-1#
If so,you may have got it a little crooked.Knock it out and put a new one in.I put a block of wood under the cover and use a large socket that fits the seal to put it in.If its the timing cover gasket thats leaking,I use silicone instead of a gasket,just clean the surfaces real good and use this;
http://www.jegs.com/i/Permatex/775/81878/10002/-1
Guy
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Old 09-29-2009, 04:59 AM
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yep. thatīs the one i meant.

funny though.. i installed it just the way you described. well, something went wrong.

i was quite confident that such a big project (for an absolute beginner like me) wouldnīt go smoothly like in the movies. i was sure that something was going to fail. iīm glad it wasnīt anything bigger..
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Old 09-29-2009, 06:12 AM
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I did a google search and found this;
Install timing cover seal
The timing cover seal keeps oil from leaking past the harmonic balancer. Some seals have a coating painted on them already, some are bare metal. Put a thin bead of non-hardening sealant around the outer edge of the seal. Put a block of wood behind the cover so you don't deform the metal as you hammer on the seal. Use a bearing race driver or a tool that will contact the entire face of the seal as it's banged in.
Check to make sure that the seal is fully seated and square. Then lubricate the inner lip of the rubber seal with some grease to keep it from burning out when the engine starts up.

Maybe this will help.
Guy
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Old 09-29-2009, 06:18 AM
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Check the damper snout OD to see how bad the groove is worn into it. If it's real bad, install a sleeve- available from the parts house or Summit, etc.
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Old 09-29-2009, 07:24 AM
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i wasnīt sure what you meant cobalt327...

so i did some research and came to know how much (or little) i know about re-building engines.. ouch.

i guess itīs possible to make a major fail by installing the damper incorrectly.. *****.. i guess it might not be in a proper position. how much clearance there should be between the damper and the cover?

i just put it there and didnīt think about that at all..

now you can see one learning a lesson here...

iīm gonna take the cooler out of the way, detach the bolt and show the damper a few careful hits of a hammer...

the hell with me and my ignorance..
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Old 09-29-2009, 08:20 AM
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Please don't hit the damper with a hammer. There is a tool for installation the the damper.
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Old 09-29-2009, 08:27 AM
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I wouldnt use a hammer,you could do possible damage to your balancer.Heres a link to a post on this subject;
SBC Harmonic balancer install
Here is what cobalt327 is referring to;
http://www.summitracing.com/parts/FEL-16202/
Heres the proper tool;
http://www.jegs.com/i/Comp-Cams/249/...ductId=1212517
Guy
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Old 09-29-2009, 09:33 AM
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timing cover seal

could also be leaking through damper where it slides on crank snout , been there done that too , put light dab of silicone on crank before you put damper on , oil can leak through the key way slot .this will make you think it's the seal .
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Old 09-29-2009, 11:36 AM
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i donīt have that kind of tool. they donīt sell them in my local parts store. i have only a tool for removing.. weīve been using lead hammers or steel ones and a thick peace of metal and iīve never seen anything bad happening. the key word is being very careful. but thanks for warnings anyway.

i would buy the tool if it was a bit easier task, it just seems a bit stupid to buy a cheap tool and then pay much more for the freight and possibly taxes.

maybe, if they donīt have the sleeve and recommend buying a new balancer instead, i order one from summit and the tool too..
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Old 09-29-2009, 11:43 AM
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In the first post of this thread it quickly describes how to make an installation tool,using a piece of threaded rod,nuts & thick washers.
SBC Harmonic balancer install
Guy
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Old 09-29-2009, 01:24 PM
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one more stupid question before i start using "search" for finding answers..

what thread is in the damper bolt?

i donīt have a good bolt store nearby, those not so good ones sell only metric ones... would be quite easy to call if i just knew what to ask..

thanks a million for your help so far..
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Old 09-29-2009, 02:28 PM
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Quote:
Originally Posted by the other Mick
what thread is in the damper bolt?
It's a 7/16-20 (fine thread). Torque on the damper bolt to fasten it to the crank is 60 ft/lbs.
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