Author Topic: Engine Timing on Reassembly  (Read 1147 times)

Harry

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Engine Timing on Reassembly
« on: December 16, 2019, 18:30:36 »
I wanted to touch base with the experts on re-assembly of the engine (230SL) and timing of the crankshaft, camshaft and horizontal timing gear.  When installing the timing chain, I will set the crankshaft to 0 deg TDC and align the camshaft to the marks on the forward cam pedestal.  I'm curious about the timing of the HTG?  I recall there was a tick mark on the side of the spline that faces the fuel injection pump so it would seem that I also need to set the HTG to a prescribed position at that same time (engine at TDC).  Is this correct?  I realize that I also have to be concerned about the FIP timing upon installation of the pump but I recall that I will set the engine to a position (20 deg ATDC?) at that time and be sure the FIP is also in position (not 180 degs out) where the notch is lined up (more about this later).

The distributor will be installed such that the rotor button points at the scribe in the housing when that time comes.

Any good advice, please?

Thank you,
Harry
Harry Bailey
Knoxville, TN
1966 230SL
Automatic

ja17

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Re: Engine Timing on Reassembly
« Reply #1 on: December 16, 2019, 21:09:15 »
The horizontal timing gear (HTG) does not need to be indexed. The small vertical distributor drive gear (under the distributor) is used to make coarse adjustments for distributor orientation.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

Harry

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Re: Engine Timing on Reassembly
« Reply #2 on: December 17, 2019, 14:54:50 »
Thanks Joe.  I have included a shot of the HTG before removal that shows an index mark of some sort.  That's what made me double check on the orientation.

Harry
Harry Bailey
Knoxville, TN
1966 230SL
Automatic