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#1
10-24-2005, 03:28 PM
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Almost busted timing chain
A few weeks ago, I changed my timing chain because I knew it was stretched and there was a ticking sound coming from the camshaft sprocket area. As I rolled out the old chain, I found the master link part almost totally disintegrated. Only the middle link was still holding the chain together. Here are some pictures of the timing chain master link area after I removed it from the engine.
The top picture shows the front view of the master link which is missing the circlip part. The middle picture shows the rear view of the master link with a (busted link) The lower picture shows the master link part along side the center link that held the chain together for I-don't-know-how-long. Notice the oval holes worn in the center link part. The wear in these parts allowed the chain to flop outwards on the camshaft sprocket about 1/8", which explains the ticking sound I heard. The chain pins have worn heads showing that they have been wearing on something (maybe the chain guides), preventing them from sliding out. It seems like this master link is the kind with the circlip end, not the peened end type. I didn't see any damage to the upper chain guide, the banana tensioner slide or the tensioner. All seemed to be OK. The ticking sound is gone. I guess this is what these chains look like just before they disintegrate. Had I known that the master link was this bad, I could have saved the hassle of grinding a swaged link away to get the old chain apart. I could have just pulled the master link out with my fingers.  1979 300D with 120k mi, but I suspect the odometer has been rolled back. 
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#2
10-24-2005, 04:12 PM
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Damn! You got lucky, nice find.
__________________
'83 240D with 617.952 and 2.88 '01 VW Beetle TDI '05 Jeep Liberty CRD '89 Toyota 4x4, needs 2L-T '78 280Z with L28ET - 12.86@110 Oil Burner Kartel #35 http://i16.photobucket.com/albums/b1...oD/bioclip.jpg
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#3
10-24-2005, 04:25 PM
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heckuva good reason for not using the clip type retainer!
__________________
'82 300SD - 361K mi - "Blue" "Good judgement comes from experience. Experience comes from bad judgement." listen, look, .........and duck.
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#4
10-24-2005, 06:40 PM
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Wow, you are fortunate.
I just checked the 617 for stretch over the weekend after reinstalling the chain. 2.5° using the mark on the tower. Not bad for 185K. Probably the original chain.
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#5
10-24-2005, 10:27 PM
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whats the link to that page for how to check chain stretch on 60x and 617 engines? I lost it when my old comp died.
__________________
 1980 500SE/AMG Euro 1981 500SEL Euro 1982 380SEL 1983 300TD 1983 500SEC/AMG Euro 1984 500SEC 1984 300TD Euro 1986 190E 2.3-16 1986 190E 2.3 1987 300D 1997 C36 AMG 2003 C320T 4matic past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
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#6
10-24-2005, 11:01 PM
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Quote:
The fast way requires no tools and you can get a quick read in minutes. LMK which way you want to go.
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