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+--- Thread: Installing a new flexplate (Finding TDC) (/showthread.php?tid=2694)
Installing a new flexplate (Finding TDC) - Sobo - 06-10-2011
Hey all, I currently have a manual 5 speed hooked up to my OM617.
I am in the process of swapping it to an automatic and I need to line the flex plate up in accordance to TDC so the engine remains balanced.
Where would I find the reference point for this?
Thanks,
Alex
RE: Installing a new flexplate (Finding TDC) - larsalan - 06-10-2011
![[Image: cs_10a.jpg]](http://www.peachparts.com/diy/om617timingchain/cs_10a.jpg)
This is it, right?
RE: Installing a new flexplate (Finding TDC) - willbhere4u - 06-10-2011
Mark the old flywheel before you pull it off then have a machine shop match the balance on the flex plate and install it so the marks line up!
?why would you want to convert from manual to automatic?
Save the 5spd some people on here would pay big money for it!
A 5spd Mercedes would be worth a couple grand more than a comparable one with an auto!
RE: Installing a new flexplate (Finding TDC) - Sobo - 06-10-2011
(06-10-2011, 02:19 PM)willbhere4u Mark the old flywheel before you pull it off then have a machine shop match the balance on the flex plate and install it so the marks line up!
?why would you want to convert from manual to automatic?
Save the 5spd some people on here would pay big money for it!
A 5spd Mercedes would be worth a couple grand more than a comparable one with an auto!
The new flexplate is marked "TDC" as a reference place. From what I understand the actual balance between plates is minimal but the placement is what matters most.
For one I have a G-Wagen not a sedan and the 5 speed Getrag unit was terrible and finally it just let go. Automatics are cheaper and better suited for the vehicle I have.
RE: Installing a new flexplate (Finding TDC) - unaleman - 06-12-2011
Hmm. the flex plate is the thin piece bolted to the torque convertor... the toothed automatic flywheel is what needs to be "match balanced" or perhaps more correctly- match imbalanced- to the original clutch flywheel which is the piece that should be indexed to TDC then that flywheel and the crankshaft peened/marked indelibly.. then removed and take your automatic stuff- the automatic flywheel with teeth to the machine shop and they will balance to your TDC marks.... the camshaft pic above is only correct if the crankshaft pulley is also indicating TDC or "OIO" on the degree wheel at the same time hope this helps .
RE: Installing a new flexplate (Finding TDC) - Sobo - 06-13-2011
Thanks.
Does anyone have a picture of the crankshaft pully TDC mark?
RE: Installing a new flexplate (Finding TDC) - RonB - 06-13-2011
(06-13-2011, 12:33 PM)Sobo Thanks.Re the flex plate ,They only fit to the crank in one place. look carefully at the mounting bolts and you will see that one bolt is off center .
Does anyone have a picture of the crankshaft pully TDC mark?
RE: Installing a new flexplate (Finding TDC) - Sobo - 06-14-2011
Is the stud on the front of the crank shaft pulley TDC when it meets the bracket?
RE: Installing a new flexplate (Finding TDC) - RonB - 06-14-2011
(06-14-2011, 01:09 PM)Sobo Is the stud on the front of the crank shaft pulley TDC when it meets the bracket?No that is the magnetic pickup stud for a tacho . the damper is marked in degrees with 0I0 being the TDC position of number 1 . there should be a small pointer on the front the engine on the left side which lines up with the 0I0 mark. At the same time your cam mark as in the above pic ,will be lined up closely,but not exactly because of chain wear etc.