Hi,

I know this is an old thread, but I'm having trouble getting a definitive answer on which mark is TDC on my flywheel.

It's the same flywheel as the one in this post. I timed it up to 'I' but its running very poorly. (I've rebuilt the engine after a cracked cylinder head).

I have noticed another timing indicator. It's a notch on the crank pulley which lines up with a line on the plastic timing belt cover.

When I turn the crank very slightly clockwise, to line this indicator up, my flywheel points to the 'T' mark.

Could 'T' be top dead centre on these flywheels?

Have attached photos

 

Ignore the flywheel teeth as the ring gear can be fitted in any position 360 degs round

 

took some better pictures when i got home today. i also found a z or possibly a 2 to the left of the 0. the pic is upside down and the tippex is my pump mark so ignore that. i don't know if the z or 2 holds any significance? i assume from the last reply that the flywheel tooth to the right of the pointer in the second picture is tdc? if so my cam belt has slipped a tooth, which explains my engine pinging sound. i guess I'm lucky it didn't slip further. thanks for the replies so far guys. any further conformation would be awesome, thanks

 

took some better pictures when i got home today. i also found a z or possibly a 2 to the left of the 0. the pic is upside down and the tippex is my pump mark so ignore that. i don't know if the z or 2 holds any significance? i assume from the last reply that the flywheel tooth to the right of the pointer in the second picture is tdc? if so my cam belt has slipped a tooth, which explains my engine pinging sound. i guess I'm lucky it didn't slip further. thanks for the replies so far guys. any further conformation would be awesome, thanks

This Picture has been a great help, thank you , six years later !

 

The first picture is your clutch and not a timing mark
The second picture is the timing mark and it is O | T and you line the pointer up on the | between the O and the T

 

I'm with you on the phone idea. That's what I had to do just to find those marks, you would think they could produce the flywheel with a more pronounced mark. Thanks for the reply, I will have another look tonight.

 

Sorry, missed your lat post. From memory mine was at the 0 as in 0 degrees before TDC. I think the actual timing mark was set back behind the 0. that's why I used the camera method to see it. not sure if it's the same between the engines but worth a try.

 

The camshaft slot will only line up the one way, so if it's in line your at TDC (assuming current belt isn't a tooth out). Check the pump mark too, it should be near enough at the marker as well, I say near enough as it may be adjusted slightly to get timing right. On my 2.5tdi I found it very difficult to see the timimng mark on the flywheel while it was in the van, looking straight down at it was not showing the mark. I used a mobile phone set on the video camera mode, put it in at an angle on top of the box and fom 45 degrees or less, the mark was much more visible, esp with the flash set to on. I used the phone as my head wouldn't fit in there.

 

I have the rocker cover and the cam sprocket at the pump end off and the camshaft and lobes line up with the timing line on the head. With the camshaft lined up my flywheel shows the pointer in the first picture as the timing mark but as I have 2 of these on my flywheel I need to be sure of the tdc mark. I'm not looking to use where the flywheel is currently as a reference because I'm assuming my timing has slipped and I need to start from scratch

 

it's not clear so take the rocker cover off and see if lobes 1&2 are sitting flat and pointing opposite ways.