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Technical => Driveline => Topic started by: wazzah on November 23, 2011, 08:41:43 PM

Title: 173 engine
Post by: wazzah on November 23, 2011, 08:41:43 PM

 G'day boys and Gals,

I have a 173 engine in my beddie  ::) ::) ::) and i need to set the ignition timing but cant seem to locate the marks to do so can any one help? pics would be awesome...Also i know most of you have got either v8s,186 or 202s in but has anyone got a 173 in or have you all upgraded.Would love to know ow the 173 goes and if you have done any mods that give it more power.

Cheers
wazzah

Title: Re: 173 engine
Post by: vintageholden on November 23, 2011, 08:55:50 PM

marks are a pain..you can never find them..
take #1 plug out..
turn motor over by hand until piston is at the top use a torch to see
take dizzy cap off
rotor should be facing forward
there is a mark on the rotor
is should line up with a mark on the dizy(cut out)
thats top dead center
look at the harmonic balancer..
there should be a cutout as well
and 6 deg before top dead center is good
should be timming marks on the crank case..

(http://i175.photobucket.com/albums/w156/vintageholden/tdc.jpg)

(http://i175.photobucket.com/albums/w156/vintageholden/timingmarks.jpg)

hope this helps

Title: Re: 173 engine
Post by: ben on November 23, 2011, 10:22:00 PM

step 4.... if th rotor is facing backward you have the wrong TopDeadCentre and do another cycle till its facing forward. there are 2 top dead cetres. one is compression stroke other is exhast stroke. i think

cheers
ben

Title: Re: 173 engine
Post by: vintageholden on November 24, 2011, 07:40:58 AM

true...180 deg out

Title: Re: 173 engine
Post by: wazzah on November 24, 2011, 07:42:01 PM

Thanks guys,

And awesome pics this helps heaps, I get into Saturday and see if I can make some sense of it.
Thanks again I will let you guys know how I get on.:)

Title: Re: 173 engine
Post by: cfjeff on November 26, 2011, 07:55:01 PM

another trick to use instead of a torch is to slide a screwdriver down the plug hole and turn until the screwdriver rises, and then falls, when it starts to fall wind the back until it is at the top again, this is top dead centre, and the timing marks should line up.

Title: Re: 173 engine
Post by: vintageholden on November 27, 2011, 09:20:25 AM

i used a screwdriver before and it got stuck as the piston came up..
must have been high compression??

Title: Re: 173 engine
Post by: Dano on November 28, 2011, 12:04:46 AM

try and use a drinking straw, might save a piston or rings etc. just a thought.

Title: Re: 173 engine
Post by: ben on November 28, 2011, 08:06:46 AM

nice idea dano!! yeh its definatly a must to stick something in there to get the feel of where the piston is..

ben