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Oil leak [message #305137]

Mon, 08 August 2016 11:32

Bill Shourt

Messages: 33
Registered: January 2005
Location: Sherman Oaks ,Ca

Karma: 0

Member

My 78 GMC with 403 engine started leaking oil where the distributer goes into the engine block Any ideas as to cause and cure?
Engine is original with 110,000 miles and runs beautifully. Thanks for all of the help we get on this forum.

Bill and Michele Shourt
78 Kingsley, origional

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Re: [GMCnet] Oil leak [message #305149 is a reply to message #305137]

Mon, 08 August 2016 13:38

jimk

Messages: 6734
Registered: July 2006
Location: Belmont, CA

Karma: 9

Senior Member

There are two things that hold the oil back; O Ring on the round housing
and the round flat gasket.
You probably have a plugged up PVC valve and or the filter that is attached
to the left side valve cover.
That is causing some pressure build up in the case.

On Mon, Aug 8, 2016 at 9:32 AM, Bill Shourt wrote:

> My 78 GMC with 403 engine started leaking oil where the distributer goes
> into the engine block Any ideas as to cause and cure?
> Engine is original with 110,000 miles and runs beautifully. Thanks for
> all of the help we get on this forum.
> --
> Bill and Michele Shourt
> 78 Kingsley, origional
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502

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Re: Oil leak [message #305181 is a reply to message #305137]

Mon, 08 August 2016 19:49

Bill Shourt

Messages: 33
Registered: January 2005
Location: Sherman Oaks ,Ca

Karma: 0

Member

Thanks Jim, I have replacements here somewhere Hope I don't have to pull the distributor.

Bill and Michele Shourt
78 Kingsley, origional

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Re: Oil leak [message #305182 is a reply to message #305181]

Mon, 08 August 2016 19:59

pjburt

Messages: 436
Registered: February 2016
Location: Fresno, California

Karma: 1

Senior Member

Bill Shourt wrote on Mon, 08 August 2016 17:49

Thanks Jim, I have replacements here somewhere Hope I don't have to pull the distributor.

If it is the o-ring and/or gasket you will have to pull the distributor. Double check that the leak is not coming from the back of the intake manifold.

Jerry Burt Fresno, CA.
73 Gmc 26' Canyon Lands
Members: FMCA - GMCMI - GMCWS
A truly happy person is one who can enjoy the scenery on a detour.

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Re: [GMCnet] Oil leak [message #305183 is a reply to message #305181]

Mon, 08 August 2016 19:54

Kingsley Coach

Messages: 2691
Registered: March 2009
Location: Nova Scotia Canada

Karma: -34

Senior Member

If you have to pull it, mark everything to the point of overkill ! Re
install to the Exact location..
Good luck!

Mike in NS

On Mon, Aug 8, 2016 at 9:49 PM, Bill Shourt wrote:

> Thanks Jim, I have replacements here somewhere Hope I don't have to pull
> the distributor.
> --
> Bill and Michele Shourt
> 78 Kingsley, origional
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS

Life is too short to hold a grudge; slash some tires and call it even !
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Re: Oil leak [message #305189 is a reply to message #305137]

Mon, 08 August 2016 23:24

Ken Burton

Messages: 10030
Registered: January 2004
Location: Hebron, Indiana

Karma: 10

Senior Member

If it were mine and I like where the distributor timing is currently set, I would do as Mike says. I would also throw a timing light on it and see exactly where the timing is now. Then after reinstalling the distributor I would set the timing to exactly the same point as it is now.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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