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Old 11-21-2000, 11:45 PM
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The 83 300D-T which i bought had been maintained mostly with star-service all its life. The only thing major that has been replaced so far is the rear axle at around 160k. The car has 185k now and despite needing a tie-rod replacement and rear brakes soon. What other items should i consider replacing for preventive replacement? The timing chain has been suggested by the dealer, but an independent mechanic i have said the timing chain will give a rattle sound at start up if that was going bad, so don't worry about it right now. The coolant looks excellent, so do all other fluids? Please all suggestions are welcome! Thanks! I want to get 350,000 out of this car!

83 300D-T
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Old 11-22-2000, 07:58 PM
Registered User
Join Date: Jun 1999
Location: Los Angeles, Calif, USA
Posts: 521
I do not think the rattle sound method is a good way to check the T-chain. Steve posted a 2 MM method to check the T-chain few days ago. If you search this forum, you will find another way to check it. The 2 MM method is the official way to check. You also need to look at other parts inside the T-chain housing to determine if a new chain is needed. Get a second opinion.

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Old 11-22-2000, 11:10 PM
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Thanks David,
I spent some time to read the methods on timing chain check on the forum, and thank you for your response. I will have the M-B dealer check and/or replace the chain


83 300D-T
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Old 11-23-2000, 02:55 PM
Wm. Lewallen
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Brett, While I'm waiting for my family to arrive for Thanksgiving dinner, I would like to give you some information on timing chain replacement. I have searched my MB manuals back to the 50's(180D and 190Db)and no where have I found any specific specs. about when to replace the timing chain. Let me quote what the manual states:"If the timing requires correction,install an offset Woodruff key,or if the chain is excessively elongated,install a new timing chain." They are talking about the key in the camshaft, and are available in steps of 4 to
10 degrees offset measured at the crankshaft. If your chain tensioner is good and the sliding rail is in good shape,there will be no slack in the chain. With wear the chain will seem to get longer causing valve timing to be altered. Too much change in valve timing will cause the pistons to hit the valves,and something has to give and it is usually the chain.
Check the tensioner and if it is good and your chain is tight,install one of the offset keys.You will save a bundle of money and can be assured that your chain will last for many more thousands of miles. When a chain breaks it is most likely caused by some other part breaking,causing the chain to try and jump a tooth. Since there is no room to do so the chain will snap.
Good luck
Bill Lewallen Lexington,Ky.
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