Inlet sprocket gear for w203,m271

[Remmy mumba]

I have a w203,m271, which jumped timing ,and we noted that the inlet sprocket gears teeth were gone,of which we had it replaced.but the problem is that the chain is making noise,and just discovered that it get loose in between the two sprocket gears.we have also changed the tensioner

 

[Blobcat]

Hello and welcome

All too common on an M271 unfortunately

 

[star]

Needs a chain too.

 

[Remmy mumba]

Hey all am new here.
I have a Mercedes 2006 model c180,w203,m271 which skipped timing upon opening we discovered that the inlet camshaft sprocket gear had lost its teeth,of which we replaced it.but immediately after replacing it,the vehicle started making noise like a it were a diesel engine,after openning the top we found the chain loose in the middle between the two camshaft sprocket gears.
What could really be the problem?

 

[Blobcat]

As per above, no requirement to start multiple threads, it just makes it confusing

 

[Remmy mumba]

Hello and welcome

All too common on an M271 unfortunately

What could i do for the vehicle to be fine

 

[Wighty]

What could i do for the vehicle to be fine

Find a reliable mechanic who knows Mercedes problems

 

[star]

And don’t drive it, because if it snaps and bends valves, you open a whole new world of pain.

 

[LostKiwi]

As above, the normal fix is replace both sprockets, chain and tensioner with new.

 

[sonic]

Go back to whoever replaced the sprocket, & ask why he didn't change the chain at the same time.

 

[Remmy mumba]

Thank you all for your answers,we changed the all timing system,and the rattling sound is gone but theres a new problem,code P0335.the vehicle is back firing and stalling if at all it moves

 

[alexanderfoti]

Sounds like the timing is off

 

[star]

Or a bent valve?

 

[alexanderfoti]

Or a bent valve?

Why not both?

 

[LostKiwi]

Sounds like the timing is off

Agreed - it's a camshaft sensor error so would make sense.

 

[Remmy mumba]

Hey everyone,i have just learnt that the inlet sprocket gear locking pin,was off en the time we tried to put on TDC the inlet cam never moved for about 10 or so degrees.after giving it a complete 360 turn the cam aligned. Am now worried,
Is it possible that the valves can be okay?

 

[alexanderfoti]

Hey everyone,i have just learnt that the inlet sprocket gear locking pin,was off en the time we tried to put on TDC the inlet cam never moved for about 10 or so degrees.after giving it a complete 360 turn the cam aligned. Am now worried,
Is it possible that the valves can be okay?

Now that its timed, do a compression or leakdown to confirm if the valves are seated or not.

 

[LostKiwi]

Hey everyone,i have just learnt that the inlet sprocket gear locking pin,was off en the time we tried to put on TDC the inlet cam never moved for about 10 or so degrees.after giving it a complete 360 turn the cam aligned. Am now worried,
Is it possible that the valves can be okay?

Turning by hand they should be fine.

 

[Remmy mumba]

Hey all hope you all great, we have taken out the head and just discovered that the head is richly black,and the valves are closing very well.
Is it possible that the cylinder head gasket would allow air in when not tied correctly?

 

[LostKiwi]

No. Head gaskets always leak from a high pressure zone to a low pressure one. Generally that means from the cylinder to anywhere else. There are usually lots of other issues if that's the case.