Yesterday I took my 1993 Audi 100CS to my buddy's garage. We were plannning on replacing the water pump, timing belt etc.

But the problem we face now, we don't know how to set/position camshaft gears, as there is now mark on them. Could anyone tell if there is anyway to do it without special tools? If not, what kind of tool I need to position correctly position camshaft gears?

Looking forward to hearing from you:)

Thanx

<img src="http://i15.ebayimg.com/01/i/000/a7/32/9e0c_1.JPG">

It fits in the holes in the keyed elongated washers that hold the pulleys onto the camshafts.

You can get the tools off ebay for $100. I rent mine out, but I need them for at least the next week.

This is probably your best shot at getting it back together, unless time is not an issue and you want to wait for mine ($30). <a href="http://cgi.ebay.com/ebaymotors/VW-Audi-3242-3243-Camshaft-Timing-Engine-Cam-Tools_W0QQcmdZViewItemQQcategoryZ35625QQihZ002QQit emZ120151369271QQrdZ1QQsspagenameZWDVW">ebay tools</a>

If you do the job without the black "pin" that holds the crankshaft in the correct position, the cam sprocket puller which allows the sprockets to rotate freely as you tension the belt, and the cam sprocket alignment bar, you have no chance at all of having the timing be accurate.

Worse case scenario, you put it back together without the tools thinking the crank is supposed to be at TDC #1, fire it up and bend valve.

Rent or buy all 3 tools, or take your chances.

...you can mark the position of the camshaft by little marks

<img src="http://pictureposter.audiworld.com/97090/cam_pos_before.jpg" border="0" alt="before">

...and you should NOT be amazed if they change position dramatically after loosening the timing-belt...

<img src="http://pictureposter.audiworld.com/97090/cam_pos_after.jpg" border="0" alt="before">

...but the marks helped us to put it back together as it should be.

-&gt; Maybe it´s not the right way to do the timingbelt-job, of course IT IS WRONG TO DO IT LIKE I DID, but, however, it worked...:-)

Cheers,

holg

Folks,

Thank You for your comments, I really appreciate your help.

The other question I have, when exactly I should use the tool, before taking off the timming belt or when putting it on?

Should we start taking off the belt without the tool?

Because what we did yesterday was just unscrew the crankschaft bolt and I think we lost that 'top dead center', as we didn't have this tool.

You haven't damaged anything yet, but you're headed that direction fast.

Slow down (as you are by being here asking the important questions) and do it right the first time.

From what I read here today, I understood that tools are critical part in all the process.

But what I would like to find out is, if I need the tools only in the process of putting on the timming belt?

Because our projet also includes changing the water pump, tensioner, idler roller, seals etc.

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yield strength of the material, i.e., material is in plastic range. If you re-use the crank bolt and re-tighten it to spec (200 N-m + 180 degree turn), the bolt will fail (break).

plus some helpful pointers.

<a href="http://forums.audiworld.com/a6100/msgs/70117.phtml">http://forums.audiworld.com/a6100/msgs/70117.phtml</a>

<a href="http://forums.audiworld.com/a6100/msgs/70121.phtml">http://forums.audiworld.com/a6100/msgs/70121.phtml</a>

<a href="http://forums.audiworld.com/a6100/msgs/73140.phtml">http://forums.audiworld.com/a6100/msgs/73140.phtml</a>

BEER!
<img src="http://i47.photobucket.com/albums/f174/DavesData2/1996%20A6Q%20Pearl/Timing%20Belt/DSCN4636.jpg">

There are a few folks here who will lend or rent you the tools. Check on your local area forum if you're in a hurry...or pay to have them sent overnight from someone you rent them from.

I wouldn't try to turn the crank or cam sprockets at all until you get the timing belt back on in the position you have them at now. If you didn't set the engine at TDC before disassembling it, I'd probably put the old belt back on, tension it about right, and GENTLY turn the engine to TDC. Stop if you feel any resistance as the pistons may be contacting the valves.

I walked into a local shop a few months back (I'm friends with the owner and the techs) and they a C4 100 that they were doing cylinder head gaskets on. They're a Brit car shop, so this was waaaaaay out of their realm. The tech, who's very good, and he'd marked the cams, the sprockets, the crank, the bearing caps next to the cam, and on and on.

He was putting the t-belt back on when I happened to stop in. I actually told him the same thing I'm telling you; "Stop! Wait for me to come back with the tools."

I came back and sure enough, it would have grenaded had we not done with all the tools.

As a final note: If you install the timing belt without losening the cam sprockets so they can rotate freely while you tension the t-belt without moving the cams at the same time, you'll have the cams pulled waaaaay out of time.

OK, point taken, but he still has to get the crank and cam turned to the right position so he can fit the cam tool on the sprockets, have the mark on the crank pulley lined up with the mark on the plastic shroud, and get the pin in to hold the bottom end in position. Turning one and not the other is asking for trouble...I still think I'd tackle that task by putting on the old belt and getting everything back close to it's right position while he's waiting for the tools.

We had to do the same thing with that 100 in the shop, but it was so far out of wack we had to carefully rotate the crank clockwise in small increments and do the same with the cams. Once we had the crank in the right spot, we put the holding pin in, and then used the cam bar to get the cams sitting right. After that, we were able to break the sprockets loose, put the t-belt on and dial it in.

I had one of those Sat afternoon and it wiped me out! After I woke up from my nap I read the label and saw it was almost 10% alcohol.

I need to get more of that while it's still in stock here in Utah, before the state-run liquor store realizes it's potency.

My regular hang out on the south side...restaurant and brew pub...always 42 beers on tap! HUGE menu, great beer...

I like most SN beers...my favorite breweries are Rogue, Lagunitas, and Bell's, but I'll drink anything that's good!<ul><li><a href="https://www.fatheads.com/">https://www.fatheads.com/</a</li></ul>

<a href="http://bimmerzone.com">bimmerzone.com</a>

but it probably leaves a significant amount of power on the table for no good reason.

<ul><li><a href="http://www.youtube.com/watch?v=tk_YyPXV_GE">http://www.youtube.com/watch?v=tk_YyPXV_GE</a</li></ul>