This was written in response to the owner of a 300SD, but is generic to all roller chains.
Timing chain stretch does not exist = it is wear on the pins and bushings = Wear Elongation Measurement.
Chain elongation/wear is not corrected by an offset Woodruff key..
I have stopped checking timing chain elongation/wear on any engine over 250,000 miles, the labor/time is identical to replace the chain.
The cost of a chain is cheap insurance, and generally improves performance.
My rule of thumb is 200-250K miles I replace the timing chain = don't waste money/time checking it..
If the timing has not been changed since new = replacing the timing chain will bring the timing back where it belongs.
IMO: If the chain has measurable elongation/wear = Replace it regardless of mileage!!!
A worn chain is damaging the sprockets.
What is running a damaged/worn out timing chain going to cost ?
At least (by the labor time guide) 4.7 hrs labor + all of these parts....
Crankshaft gear
MB# 617 052 00 03
http://www.pelicanparts.com/cgi-bin/ksearch/pel_search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&command=DWsearch&descriptio n=617+052+00+03&x=12&y=11
Camshaft gear
MB# 121 052 03 01
http://www.pelicanparts.com/cgi-bin/ksearch/pel_search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&command=DWsearch&descriptio n=121+052+03+01&I1.x=4&I1.y=6
sprocket gear
MB# 621 050 04 09
http://www.pelicanparts.com/cgi-bin/ksearch/pel_search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&command=DWsearch&descriptio n=621+050+04+09&I1.x=15&I1.y=6
Timing device
MB# 617 070 05 45
http://www.pelicanparts.com/cgi-bin/ksearch/pel_search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&command=DWsearch&descriptio n=617+070+05+45&I1.x=7&I1.y=4
Damage cost TOTAL $1,222.00
+ Labor
The
minimum cost of parts for a DIY rebuild is roughly $1550 - $2000 USD.
OM617.952 Rebuild parts list
OM617.952 Rebuild parts list
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There is only one brand of timing chain to use.
Warning, Danger: Please read this thread FIRST...
Need Automotive Grade Prozac
Need Automotive Grade Prozac = timing chain
OEM: brand IWIS
Timing Chain, With Master Link Double Row - 136 Links
MB# 003 997 62 94
http://www.pelicanparts.com/cgi-bin/ksearch/pel_search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&command=DWsearch&descriptio n=003+997+62+94&I1.x=10&I1.y=3&FILTER_997M=ON
The best guide rail is SWAG
MB# 6150500916[
http://www.pelicanparts.com/cgi-bin/ksearch/pel_search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&command=DWsearch&descriptio n=6150500916&I1.x=15&I1.y=9
upper guide rail
MB# 6150501416
http://www.pelicanparts.com/cgi-bin/ksearch/pel_search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&command=DWsearch&descriptio n=6150501416&I1.x=10&I1.y=10
lower outer guide rail
MB# 6150521016
http://www.pelicanparts.com/cgi-bin/ksearch/pel_search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&command=DWsearch&descriptio n=6150521016&I1.x=14&I1.y=5
lower inner guide rail
MB# 6150521116
http://www.pelicanparts.com/cgi-bin/ksearch/pel_search.cgi?SUPERCAT_FLAG=Y&make=MBZ&please_wait=N&forumid=&threadid=&command=DWsearch&descriptio n=6150521116&I1.x=14&I1.y=8
FYI: Links you may need:
PeachParts Mercedes ShopForum > Do It Yourself Links & Resources > DIY Links by Parts Category
Fast navigation Do It Yourself Links
Fast navigation Do It Yourself Links
Valve adjustment OM615, 616, 617 FYI.
Valve adjustment OM615, 616, 617 FYI.
Need Definitive OM617 Compression Test Procedure
Need Definitive OM617 Compression Test Procedure
Engine blow-by test, Blow a bag of blow-by
http://www.peachparts.com/shopforum/diesel-discussion/193602-engine-blow-test-blow-bag-blow.html#post1558819
Diesel Timing Chain Links Thread
http://www.peachparts.com/shopforum/diesel-discussion/162071-diesel-timing-chain-thread.html#post1251434
Timing Chains Don't Last Forever
Timing Chains Don't Last Forever
Diesel Injection:
Diesel Injection: