M103 chain tensioner-Need Help
 

Hi,
1990, 190E, 2.6, 164K. After reading several posts in this forum, I initiated a timing chain tensioner replacement. I was able to open the tensioner housing, then the old spring without removing the air pump for exhaust (I exactly don't know the name of the part, its located above the alternator and connected with the serpentine belt).

After putting the tensioner housing, then plunger and then spring I am not able to put back the outer nut (12mm hex), its just too difficult to put the nut back to thread against the pressure of the spring.

Plz advice how to resolve the problem. Do I need to loose serpentine belt tensioner>loose belt> take out air pump and then try to put back the chain tensioner outer nut?

How to open the air pump for exhaust?

Any help will be highly appreciated.

Thanks

If you think that more space would help you out then loosen the serp belt and remove the top air pump bolt and 'pivot' it over to give you more room. You don't have to remove it completely.

Ultimately though, and I know it's a b!tch to get back on, you're going to have to manhandle that cap (use both hands) against the force of the spring until you touch the threads then turn slightly to get it started and locked in place. Cleaning the threads on both the cap and the hole help a little also.

Good Luck ;)

Thank you so much.

This is the ONLY way to get the threads started. I've tried everything else !:rolleyes:



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