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Old 09-18-2003, 08:09 PM
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1987 420 sel lower chain rails

Lots of info and tips on changing the upper chain rails and timing chain. (Good presentation on Thomaspin web site). But couldn't find much on the lower guides. I have just about everything removed but the water pump and the a/c bracket, but I don't know what to expect when I remove the cover. I'm assuming it can be removed with the heads still on the car. I wasn't planning on doing this without a manual but things happen......just trying to help someone out. Thanks for any info.
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Old 09-18-2003, 08:41 PM
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Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
Don't remove the front cover unless you intend to remove the heads! The front cover is sealed on top by the head gasket, and although the manual tells you it is possible to R&R it without taking the heads off, chances are it isn't going to seal worth diddly if you do, so you end up doing head gaskets too.

Unless you think you need valve work, leave the front cover on. Lower chain rails don't get the slap from a loose chain on startup, so they almost never cause trouble anyway, wait to do them until you need to take the heads off for some other reason.

1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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