You wrote:
<<I have some questions for the collective group if I
may, as I try and understand the diesel timing chain
and how it corresponds to the engine tune.>>>
<<I'm exactly at 5% stretch on my timing chain in my
'82 300t with a stock turbo 617.xxxx
From what I have been gathering from the various input
I have received that this is just a bit much and the
timing chain should be replaced. So I have decided to
do this.
When I do this, should I:
Replace the tensionier?>>>
I doubt it - the tensioner usually lasts a really long time. How many miles
are on the engine?? Of course, the tensioner is not very expensive and if
you want everything to be as close to "On Spec" as possible it won't hurt -
but it can always be done later - IIRC it's 2 nuts and the tensioner comes
off if you want to replace it later.
<<Since there is enough wear to stretch the chain 5% I
suspect there will be some little slack in the
sprockets. So the new chain will not exactly line up
at zero when I put it on. So should I suspect it to
line up at like 1%?>>
When I replaced mine I did not replace the sprockets and it aligned
perfectly at 0.
<<I plan on just crimping with a hammer, (since I have
some vague experience with a ball peen) this seems
fairly straight forward.>>
Make the decision on how to proceed when you have the chain and connecting
link in your hands. And consider that a failed crimp could destroy the
engine. Also consider the place you'll be working and trying to hold a
backing plate in place while you tap-tap-tap with your little hammer - while
making sure the connecting link stays in place as you hold everything and
swing the hammer, gently.
<<I have a small dremel with a grinding disk. Would
this tool be enough to grind off the pins to loose the
old chain?>>
Probably - that steel's pretty high quality and your grinding wheels tools
must be up to the task,
<<Ummm Is there anything else I should think of before
I try and swap the timing chains? I am new to this,
so any info or insight you may have, would be greatly
appreciated.!>>
Give us a day to think about it --
Good luck - and try to get your mind of it for a little while --
Sincerely,
Larry T ('74 911, '67 MGB, 91 300D Turbo)
A Blood Test for your oil - www.youroil.net
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