Timing marks on L-671 2 valve
 

Timing marks on L-671 2 valve

Started by Me Too!, April 12, 2015, 06:35:46 AM

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Me Too!

Can anyone help me decipher the timing marks on my L-671  2 valve?  The cam gear and idler gear at the cam are ok but we can't decipher between the crank gear and idler gear.  The L is stamped in a spot where we can't tell which tooth has the mark.  With everything together, timing marks as shown, piston is not on top dead.  Appreciate any information.  Thanks Don
Don and Sue Skarman
Duluth, MN
4151 GM Silversides

luvrbus

I take it you have the manual sect 1.7 pages 3 and 4 with a dial indicator if you can't see the L's, the crank to the idler the L's are in a upright on the cam to the idler the cam L is upside down and the idler L is upright just match the 4 L's and you are good to go  

If you can see the A on the crank gear turn the idler gear 1 tooth to the right looking from the rear that will be your L for std timing fwiw the piston is not going to be TDC when the stars are all aligned

good luck
Life is short drink the good wine first

Me Too!

Thank you, Cliff  your answer puts the picture in perspective.
Don and Sue Skarman
Duluth, MN
4151 GM Silversides

luvrbus

I know they cost big bucks for your own protection after doing all the work you need to install a new harmonic balance on the engine I have saw the damper break the end of the crankshaft off using a old one after a rebuild lol BTDT it's a sicking sight plus a expensive repair.
Life is short drink the good wine first