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Marco hat geschrieben:I’m wondering how much different can be warm engine vs cold, but yes he said he has another manometer for these tests and he doesn’t know the accuracy of the first he used… but I suppose we are not moving far from 1/1,5 max bar of differences, plus or even less. Let’s see.
Chain job:
Meanwhile I’ll pass in Mercedes to order new chain I think this is at least not a complicated job, replacing the chain only, assuming they sell it, only Febi is on the market as alternative….can you please revert to following points from my afternoon’s reply:
never change what is working in a 40 years old Mercedes unless it's broken, so do you suggest together with the chain to replace also the 3 guide rails and the tensioning rail? They are hidden by the timing case cover? I'd avoid to mess with a lot of things that are not leaking now, once for all the water pump but not limited to …
Please have a look to the picture of the chain tensioner I think is the correct type, why not in a factory repaired engine in 92 when they had this component redesigned already from some years. Can I keep it?
Marco hat geschrieben:good evening Nikola,
unfortunately with Febi I heard different opinion, I read from valuable forum member Chris Martens, to stay away from anything made by Febi that has rubber inside so this time we should be safe IF the part branded Febi is build in Germany...but how we know this....I searched for INA but nothing I found instead this IWIS company declared as OEM but no catalog to go through...and none selling.
Marco hat geschrieben:
Sorry but maybe I missed but I can’t read in your previous messages the description where the tech difference is from chain tensioner on Evo 2, you commented only the more expensive cost it had.
I could not find picture on the forum to compare my chain tensioner if is the correct type the ratchet type, just assume that if installed on an engine in 1992 it was the correct.
shaq hat geschrieben:Hi Marco,
I think that OEM Chain was INA which was of highest quality possible. Febi should also be very good if still produced in Germany or under strict quality control.
About chain tensioner there were few different designs during production, the best is one that can go only forward not back, has deadlock built in not only spring loaded.
Problem was not such on single chain but on duplex chain it caused lot of broken cylinder heads (and/or) covers when snaps on 2.5 Models.
The best chain tensioner is Evo2 Model but not available anymore or crazy expensive for such a simple piece of steel.
Marco hat geschrieben:good evening Nikola,
unfortunately with Febi I heard different opinion, I read from valuable forum member Chris Martens, to stay away from anything made by Febi that has rubber inside so this time we should be safe IF the part branded Febi is build in Germany...but how we know this....I searched for INA but nothing I found instead this IWIS company declared as OEM but no catalog to go through...and none selling.Shaq hat geschrieben:
Right, good advice from Chris don’t buy chain with rubber inside.
shaq hat geschrieben:Ciao Marco,
Like said cheap part from Trucktech you will find nothing special inside - is only one small hole in Housing where oil is fed to tensioner nothing special, piston or pin how to call it and spring.
…..
Also don't replace original tensioner, just if you will/can may replace the spring. It is the only thing that looses strength over time.
Bye
Nikola.
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