tdc marks on flyweel

[carrizog60]

was seeing the french forum and see that the timing marks on the flyweel that they take for reference is this:


am i doing wrong?
i never timed my pump by this but by other mark that it has... :shock:
see on bentley:

[Baselyne]

I dont think that's the right mark but i could be wrong!

[carrizog60]

because if its the wrong mark should be chaged the post as beeing a sticky...

[Vincent Waldon]

Unfortunately there are several different marks, and then people scribe their own / use gasser flywheels etc etc.

Your first picture looks a bit wonky to me in that I've never ever seen a factory timing mark right next to a flywheel bolt.

The second picture is definitely the factory mark, properly aligned.  Both my current diesel flywheels have  the diamond shape *and* a line, but the same diamond shape for sure.

My opinion would be: if you can find a mark like the second picture then go for it..... the first one looks aftermarket-ish to me.

[carrizog60]

well,the first pic is what is in the french area in a diy for timing the pump...

maybe i will alert them :arrow:

[burnt_servo]

if a person un bolted the fly wheel from the flex plate , and moved it one bolt over , would that not change the timing marks?

i can't remeber if the fly wheel and flex plate are indexed to each other .

[rallydiesel]

They are indexed to each other. There are pins that only allow the flywheel to bolt to the pressure plate one way. With that being said, using a different pressure plate could allow the flywheel to bolt on differently. I installed a new p-plate and the I had to scribe a new timing mark.

[myke_w]

That first picture is (i'm pretty sure) the dynamic timing mark for a gasser motor. It appears that someone has used a gasser flywheel on a diesel

To the right of that mark (about 1/2 inch) I believe you will find a little round peen mark, that's the static timing mark..

[subsonic]

So is there a way to mark the flywheel for TDC before it is mounted to the engine?

[rallydiesel]

The best way would be to have the cylinder head off and the transmission on. Use a dial gauge and find TDC and then punch TDC on the flywheel.

[myke_w]

I've snapped some pics with my phone showing in this order"

0 dot in white on:

gas flywheel

newer diesel flywheel (3 bolt)

older diesel flywheel (2 bolt)

all 0 dots in same place

and all 3 have the alignment pegs in the same place

http://oak.cats.ohiou.edu/~mw105397/VW/pics/020_Flywheels/

[Tintin]

The first pic is from AAZ, at each time that I have make a timing on this engine, I white painted the mark.

[slorimer]

so in picture Photo0021

is the TDC mark the punch mark to the right of the white dot?

[Baselyne]

so when putting the gasser flywheel onto a diesel how do I know where to mark the tdc mark?

[burn_your_money]

I'm pretty sure that I used this mark to time my last engine.... It runs fine.

I'll have to take the head off my spare engine and verify the marks. Come to think of it I don't think I've ever seen that diamond looking thing