Welcome Guest [Log In] [Register]
Photobucket
Welcome to Mercedes-190.co.uk

We are the Mercedes 190 owners forum, the place to be for all owners and fans of the Mercedes 190E, 190 and 190D cars. Including Cosworth (2.3 16v and 2.5 16v), EVO 1 and EVO 2 models. Modified and concourse, track cars and daily drivers, all are welcome.

This free UK based forum was started back in November 2005 to serve the Mercedes 190 W201 community and now has over 9000 members from all around the world and 600,000 + posts.

The members welcome you and encourage you to stay a while and have a look around.
We offer you friendly chat and access to some very useful information as well as tutorials with photos and videos for many common repair and maintenance jobs.
Whatever your needs there is a good chance you will be able to find what your looking for. Such as our Mercedes 190 buyers guide

Sign up to gain access to all areas including for sale / classified areas and country wide meetings and events. Many forum features and sections are only available once you sign up.

Join our forum at mercedes-190.co.uk!

If you're already a member please log in to your account:

**New members signing up**
please check your junk mail for the email authorization email
otherwise we cannot verify your new account.
I have noticed a lot of unauthorized accounts in the system.
Regards
Admin

Username:   Password:
Add Reply
Timing chain- One tooth out
Topic Started: Tue Sep 5, 2017 7:45 pm (216 Views)
Russ_90
Newbie
[ * ]
Hi all. Got myself in a bit of a pickle after changing head gasket on a 2.0 petrol.
After reassembling everything I did a quick rotation check and after two revolutions the the marks on the chain and cam sprocket are one tooth out; I obviously got the tension wrong somewhere or allowed the chain to move during assembly. So my question is how do I realign the chain, cam sprocket and crank pointer to TDC? Can I turn the crank with the cam sprocket removed and not hit the valves with the pistons? Thanks in advance.
Edited by Russ_90, Tue Sep 5, 2017 7:46 pm.
Offline Profile Quote Post Goto Top
 
Russ_90
Newbie
[ * ]
So I thought I'd reset everything and just did a complete rotation and the marks are misaligned again...WTF! Would incorrect tensioner setting cause it to index by one tooth each turn?
Edited by Russ_90, Tue Sep 5, 2017 8:58 pm.
Offline Profile Quote Post Goto Top
 
Cockney21
Part of things
[ *  * ]
Not done a 190 chain but from experience you need to make sure the chain is tensioned on the "driven" side of the sprockets. Are you saying the marks are moving one tooth every turn of the engine, or is it just one tooth out regardless of the number of crank turns.
Offline Profile Quote Post Goto Top
 
The Gorilla
Part of things
[ *  * ]
Hi,

You can get the same issues with a 16v Chain.

I guess your aligning the Timing Marks and when
you fit the Chain tensioner as it takes up the
slack, the timing goes out.

As said above, you need to make sure that the
Chain is fully tensioned on the Intake side, so that
the only slack taken up when the Tensioner is
fitted is on the exhaust side so that the Cam and
Crank are not able to rotate.

Any slack in the chain from the Cam down to the crank
Cog on the Intake side will always result in timing out
when Tensioner is fitted.

Regards,

The Gorilla.
Offline Profile Quote Post Goto Top
 
Russ_90
Newbie
[ * ]
Gorilla/Cockney thanks for your responses. Through a combination of your advice and that of MBS in Southampton (thanks guys) I've sorted it. Too much slack on drive side and incorrect tension on the chain were the culprits. Should have checked the tensioner properly as the clip had jammed and even though I'd torqued it properly it wasn't tensioning correctly. All sorted now and hoping for a start tomorrow so fingers crossed...should be ok as I've turned it over about 30 times to check :$
Offline Profile Quote Post Goto Top
 
1 user reading this topic (1 Guest and 0 Anonymous)
« Previous Topic · Engine · Next Topic »
Add Reply


Email me if anyone replys