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Changing Timing Chain And Valve Clearances; Some pictures
Topic Started: Tue Feb 27, 2007 10:36 pm (21,878 Views)
zinc
Part of things
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Conrad
Mar 2 2007, 10:30 AM
Valve clearences are a 16v thing. 8vs have hydraulic lifters which don't need adjustment.

Does anything need doing to the 8V top end as a routine and if so how often. I don't think anything has been done to mine and it's on 106K miles.
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Conrad
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Therapy Needed
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If it ain't broke, don't fix it!
Chain & tensioner could probably be changed if you haven't already. They should be done every 100k.
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Desmoboy
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Is it just me ?
I cannot see any pictures at all in this thread, shame as i'm half way through doing this myself.
Regards
keith
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MadMike
Therapy Needed
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It might be just you, i`m getting all the pictures ok..........
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Sev
I am a big Twat
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zinc
Thu Jan 3, 2008 10:36 am
Conrad,Mar 2 2007
10:30 AM
Valve clearences are a 16v thing. 8vs have hydraulic lifters which don't need adjustment.

Does anything need doing to the 8V top end as a routine and if so how often. I don't think anything has been done to mine and it's on 106K miles.
depends on whether you consider valve stem seals as top end or not. if so, they need to be replaced every 100K miles. i say do it while changing the timing chain, since the cam is coming off anyway.
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merc190uk
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The Godfather

checked my cams toady :'(

alignment is spot on but get this lot for readings all over the place !

as i understand it reading this post the exhaust should be
between (cold) 0.25-.0.35

i got

no4 = .008 and .010
no3 = .011 and .011
no2 = no reading and .008
no1 = .009 and .010


inlet is just as bad

should be between (cold) .10 and.20

no4 = .007 and .006
no3 =.007 and .006
no2 = .005 and .005
no1 = .005 and .003

how did it end up so far out ? would this explain the under 2k running and the ruff tickover.

your views from those in the no ? :'( :lol:
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cossie connoisseur
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there can be only one ;-)
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fook me they are well all over the place.....really time for new shims me thinks, tbh a job you can do yourself if you have the time and tools mate.

ive had mine checked on the auto today by the garage and will find out what needs changing
Edited by cossie connoisseur, Fri Oct 3, 2008 4:13 pm.
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merc190uk
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The Godfather

unless i'm reading my feeler gauge wrong :$

lets use 0.10 as an example as this also reads on it .254mm

is that the .25mm i'm after ?

if so the reading are a little better :lol:

exhaust .25-.35

im reading

no 4 20 and 25
no3 27 and 27
no2 20 and 0 - needs looking at
no1 22 and 25

inlet .10-.20

no4 17 and 15
no3 17 and 15
no2 12 and 12
no1 12 and 7 needs shimming

thats if i'm now reading the feeler correctly ? am i ? :'(

its all good fun :lol:
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cossie connoisseur
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there can be only one ;-)
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ive just had this conversation about the auto at the garage, for the exhaust 4 shims were around 0.42 and 3 were around 0.356 which is just above tollerance so they changed those shims. On the intake side they were all 0.11 to 0.12 which is fine.

they used Rover shims which are a couple of microns bigger in diameter but because they had a box of them they never charged me for the shims.

The difference is quite major, obviously as the valves were not letting the gasses escape in the correct manner.

well worth £200 including a service and inspection :)
Edited by cossie connoisseur, Fri Oct 3, 2008 6:30 pm.
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cossie connoisseur
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there can be only one ;-)
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what you will need to do steve is remove the buckets and shims and measure them, then you will be able to work out what size shims you need. without the actual shim thinkneses and bucked thickneses its hard to work out what new shims you need.

I would say you will need a full set as the majority of them need doing and they are pretty cheap!

also note steve that the readings should be slightly smaller at the front of the cam than the rear due to the pull of the chain on the front of the cam....its only a small amount though!
Edited by cossie connoisseur, Fri Oct 3, 2008 6:35 pm.
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merc190uk
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The Godfather

ok Thanks for the info B)

how can i work out the shim for the valve i can't get the gauge under ?

at this rate i will be a 16v expert :faint: :no: :lol:

will take out and measure later and goto my local peugeot dealers ;)




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Lewis 190E 2.5 16
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W201
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Yeap 406 or something can be used^
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Matt
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merc190uk
Fri Oct 3, 2008 6:53 pm

will take out and measure later and goto my local peugeot dealers ;)




:lol: now the next time someone asks if its got a Ford engine in it, you can reply no, a Mercedes engine with a bit of Peugeot added :lol:
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cossie connoisseur
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there can be only one ;-)
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if one of the valves is not moving then thats not too good
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merc190uk
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The Godfather

cossie connoisseur
Fri Oct 3, 2008 7:29 pm
if one of the valves is not moving then thats not too good
moves fine B) just no gap between it and the lobe when trying to take a measurement.
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Cosmo2.5-16
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merc190uk
Fri Oct 3, 2008 5:49 pm
unless i'm reading my feeler gauge wrong :$

lets use 0.10 as an example as this also reads on it .254mm

is that the .25mm i'm after ?

if so the reading are a little better :lol:

exhaust .25-.35

im reading

no 4 20 and 25
no3 27 and 27
no2 20 and 0 - needs looking at
no1 22 and 25

inlet .10-.20

no4 17 and 15
no3 17 and 15
no2 12 and 12
no1 12 and 7 needs shimming

thats if i'm now reading the feeler correctly ? am i ? :'(

its all good fun :lol:
Want you want to do is,
Get your self a feeler gauge that's Metric not Imperial,
Measure the clearance as you've done.
Ideally you want the Exhaust side At 0.3 mm and the Intake At 0.15mm, if your reading is only out by 0.02 - 0.03mm it's well in spec, this is using 0.15 and 0.30 as the spec you want to acquire, anything out by more than 0.04 is a must in adjusting.

The valve that you have no clearance on, what you'll have do is, when you have the cam out measure the shim if the thickness of the shim is 3.10, you need to replace it a Less thickness shim, say 2.95mm, put the cam back in, and measure again, at this point you should be able to get a measurement to allow you to get the right clearance.

You'll get the shims at the Peugeot dealers, there from the diesels engines.

The way it is your engine is'nt breathing well with those figures.
On another note, That disy cap and rotor look well fecked in the pic you posted.
If I was you, sort out the valve clearances and disy and rotor before you go near any part of the KE.

:) :)
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Will
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Highly Addicted
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Good advice from everyone here.

I'm pretty confident that the shims will make a marked improvement to your engine.

Are you going to replace the timing chain whilst you're at it?

I've got a brand new genuine MB 102.983 (2.3-16) timing chain sitting here in it's box doing nothing.

Will
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merc190uk
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The Godfather

chain seems very new and the tension is good too. no wear on the gears also B)
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TeZREX
Newbie
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Just a few quick points from experience on Bike/car shim changes, its better to unbolt and retorque your cam with the torque wrench you will use for the job. THis ensures that when you measure the shims and refit the new ones the clearances are as you wanted. Had a bit of a problem with an old IMP engine bought new shims fitted and the clearances were all to cokc, time to start again...Also bung any holes were stray shims may end up if you drop one, i.e. plug holes, oilways camchain tuneel etc etc can save a lot of hassle in the long run...
Oh and Kawasaki do more than one diameter of shim so it would be useful to know which diameter is correct (I have three kwacks in the garage....) Cheers guys TeZ
Edited by TeZREX, Thu Jan 1, 2009 9:36 pm.
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cossie connoisseur
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there can be only one ;-)
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pin?
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merc190uk
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The Godfather

it is :D
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oliew
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quick question about the timing chain change, if i get a chain + tensioner for MB can i change it with the cam gears left in? im thinking it will be easier for me to time back up if i just feed it while rotating the cam gears on the chain, without the cams in, then i just put the cams back the same way where ive marked them on the gears ?!
Ol
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johnnyt
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great post , ive just bought my first 2.5-16v and this sort of information is like gold dust to me caus it let me know what to look for and get done.
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Uk Merc Man
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190e Leg-End
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what are the valve gaps meant to be for a 2.5 16v....going to be doing this myself shortly....
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cossie connoisseur
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there can be only one ;-)
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written on the slam pannel
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Uk Merc Man
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190e Leg-End
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i know its written on the slam panel, just not on mine - got the figs to hand?
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chevy
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If u still have your timing chain for the 2.3, how much would you want for it as I'm just about to replace head gasket, cheers , Chevy
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Will
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chevy
Thu Feb 3, 2011 4:38 pm
If u still have your timing chain for the 2.3, how much would you want for it as I'm just about to replace head gasket, cheers , Chevy
Hi there,

That chain was sold to Crysak on this forum a couple of years back now IIRC.

I know he was selling it recently, as he later sold his car and didn't fit it, so you could ask him if he's still got it available :)

Will
Edited by Will, Thu Feb 3, 2011 7:01 pm.
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chevy
Newbie
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ecellent reading and pics, very helpfull as ive got my head to do.


Edited by chevy, Sun Feb 6, 2011 5:12 pm.
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