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Engine Specific Info and Questions => IDI Engine => Topic started by: carrizog60 on March 23, 2008, 04:03:36 am

Title: tdc marks on flyweel
Post by: carrizog60 on March 23, 2008, 04:03:36 am

was seeing the french forum and see that the timing marks on the flyweel that they take for reference is this:
(http://img.photobucket.com/albums/v319/bareil76/timing13.jpg)

am i doing wrong?
i never timed my pump by this but by other mark that it has... :shock:
see on bentley:
(http://www.oneilcastro.com/A2Bentley/FU02/i22595.gif)

Title: doubt it
Post by: Baselyne on March 23, 2008, 04:23:54 am

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

Title: tdc marks on flyweel
Post by: carrizog60 on March 23, 2008, 04:25:46 am

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

Title: tdc marks on flyweel
Post by: Vincent Waldon on March 23, 2008, 10:27:28 am

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.

Title: tdc marks on flyweel
Post by: carrizog60 on March 23, 2008, 11:08:21 am

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

maybe i will alert them :arrow:

Title: tdc marks on flyweel
Post by: burnt_servo on March 23, 2008, 11:19:44 am

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 .

Title: tdc marks on flyweel
Post by: rallydiesel on March 23, 2008, 03:34:04 pm

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.

Title: tdc marks on flyweel
Post by: myke_w on March 24, 2008, 05:31:25 am

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..

Title: tdc marks on flyweel
Post by: subsonic on March 24, 2008, 09:39:26 am

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

Title: tdc marks on flyweel
Post by: rallydiesel on March 24, 2008, 10:02:17 am

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.

Title: tdc marks on flyweel
Post by: myke_w on March 24, 2008, 10:40:40 am

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/

Title: tdc marks on flyweel
Post by: Tintin on March 24, 2008, 09:46:33 pm

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

Title: tdc marks on flyweel
Post by: slorimer on March 26, 2008, 11:18:37 am

so in picture Photo0021

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

Title: just wondering....
Post by: Baselyne on March 26, 2008, 12:25:47 pm

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

Title: tdc marks on flyweel
Post by: burn_your_money on March 26, 2008, 02:40:34 pm

(http://img.photobucket.com/albums/v319/bareil76/timing13.jpg)

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

Title: tdc marks on flyweel
Post by: Baselyne on March 26, 2008, 02:52:26 pm

i know I havent seen that diamond, but the timing line wasnt near any bolts....

Title: Re: doubt it
Post by: hillfolk'r on March 26, 2008, 08:15:40 pm

Quote from: "Baselyne"

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

if you swapped a 210mm flywheel,the mark is no longer correct,its about 1/2 inch off,,,you have to  verify tdc+remark the fw

Title: Re: doubt it
Post by: zukgod1 on March 26, 2008, 09:36:11 pm

Quote from: "hillfolk'r"

Quote from: "Baselyne"

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

if you swapped a 210mm flywheel,the mark is no longer correct,its about 1/2 inch off,,,you have to  verify tdc+remark the fw

I'll second this comment.

I had a 210mm and couldn't get it to idle to save my life, changed back to the 200mm for other reasons and decided to check my timing and dayum!
It was set at .038 (ish)mm no wonder it wouldn't idle.

Title: tdc marks on flyweel
Post by: Baselyne on March 27, 2008, 03:35:52 pm

how does one know where to re-mark when putting on the 210mm?

Your looking at the cam lobes or?/// what if someones timing belt was off..?

Title: tdc marks on flyweel
Post by: zukgod1 on March 27, 2008, 09:22:30 pm

I pulled an injector and turned the crank till it was @ TDC then marked the flywheel..

Title: tdc marks on flyweel
Post by: burn_your_money on March 27, 2008, 10:27:03 pm

Quote from: "zukgod1"

I pulled an injector and turned the crank till it was @ TDC then marked the flywheel..

Pull injector #1 or #4 since they are pairing cylinders

Title: tdc marks on flyweel
Post by: Baselyne on March 29, 2008, 11:54:33 am

good call, can be kinda tricky somtimes to know when it's all the way up but that's so true....

thanks...

Title: tdc marks on flyweel
Post by: Mark(The Miser)UK on March 29, 2008, 03:32:55 pm

:idea: This may sound obvious but ... why not rest your 210mm flywheel on top of the 200mm flywheel. Skewer with a couple of dowels [do the bolt holes go all the way through]  Else just do it by teeth and allignment tool Mark the timing mark to suit.

Title: tdc marks on flyweel
Post by: 4KTD on March 30, 2008, 07:57:10 am

I have a 1993 1.9 TD with an engine from a '95 and I just removed the pump. It was working beautyfully and the timing make was the same as the very first picture in this thread (the line not diamond).