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Turning engine by hand [message #302098]

Mon, 13 June 2016 20:14

Justin Brady

Messages: 769
Registered: April 2015
Location: Bell Buckle, TN

Karma: 11

Senior Member

I'm halfway through my FiTech and distributor install and this **** is fighting me at every turn. Shes never had any engine work in 41 years and everything is stuuuuuuuck on.

Anyway,
I need to determine base timing by finding Tdc on cylinder 1. No big deal except how the hell do I turn the engine by hand? I've pulled all the plugs and it still doesn't want to budge. Is there a nut I can get to to put a ratchet on?

It's got to be accurate so I can't just bump it with the key and get it close.

Justin Brady http://www.thegmcrv.com/ 1976 Palm Beach 455

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Re: Turning engine by hand [message #302100 is a reply to message #302098]

Mon, 13 June 2016 20:27

C Boyd

Messages: 2629
Registered: April 2006

Karma: 18

Senior Member

1 1/8 (? from memory banks) deep socket on crank bolt.

SONICJK wrote on Mon, 13 June 2016 21:14

I'm halfway through my FiTech and distributor install and this **** is fighting me at every turn. Shes never had any engine work in 41 years and everything is stuuuuuuuck on.

Anyway,
I need to determine base timing by finding Tdc on cylinder 1. No big deal except how the hell do I turn the engine by hand? I've pulled all the plugs and it still doesn't want to budge. Is there a nut I can get to to put a ratchet on?

It's got to be accurate so I can't just bump it with the key and get it close.

C. Boyd
76 Crestmont
East Tennessee

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Re: Turning engine by hand [message #302101 is a reply to message #302098]

Mon, 13 June 2016 20:32

pjburt

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

Karma: 1

Senior Member

There is a sheet-metal cover on the pass side of the bellhousing. Pop it out and you should be able to turn the engine with a screwdriver on the ring gear.

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] Turning engine by hand [message #302110 is a reply to message #302101]

Mon, 13 June 2016 23:53

jimk

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

Karma: 9

Senior Member

Your complicating things.
Use the starter ad just leave the #1 plug off and crank with your finger by
the hole and feel the air gushing out then look at the harmonic marker and
tap it and get it close, then position the rotor to the #1 firing and leave
the distributor slightly loose so you can advance the timing when it fares
up.
If it back fires through the carb, advance the timing more and try again
till it runs and advance litttle more.

On Mon, Jun 13, 2016 at 6:32 PM, Jerry Burt wrote:

> There is a sheet-metal cover on the pass side of the bellhousing. Pop it
> out and you should be able to turn the engine with a screwdriver on the ring
> gear.
> --
> Patti & Jerry Burt
> 73 Gmc 26'
> Photos - http://jburt.smugmug.com/GMC-Motorhome
> Lots of upgrades but lots to do to make it ours.
>
> _______________________________________________
> GMCnet mailing list
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--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
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