190E 2.3 Timing Chain Noise

1985 engine with single row timing chain.
The engine is from a wrecking yard with 103,000 miles. The timing chain and cam gear are clean (no carbon-like build up) and there is red RTV around the
timing chain cover so I believe that the chain was replaced recently. I can only assume that the chain guides were replaced too.
The problem it when the car is started the chain rattles loudly until the oil pressure builds up. I am sure that it is not lifters making the noise.
My questions are: Should this be considered normal for this engine? Are there any adjustments to fix this noise?
Thanks, Scott
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Not normal... you need new timing chain tensioner.
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A 2.3 chain tensioner has a ratchet in it. Unlike the V8 tensioner that are just oil pressure controlled. As a 2.3 chain stretches, the tensioner comes out to take up the slack but it cannot retract. When the tensioner reaches the end of its clicks, it can extend and retract like a V8 tensioner. BUT at this point your chain has stretched to its breaking point. You need to replace the chain very soon! To replace the tensioner, you will need a couple of big allen sockets. You remove the center allen plug. Remove the spring. Remove the housing from the timing cover. Pull the plunger out. To install: screw the housing into the cover tight. Push the plunger in [the ratchet is the spring ring on the butt end]. Install the spring. Put the end plug on the allen socket and PUSH HARD to compress the spring AND turn the allen to start the threads. Have fun!

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Another project that I'll never have time for.
Since I think that the chain is fairly new, I'll start with the tensioner. Is there anyway to test the chain for stretch? The P.O. might have used have used a cheap chain.
Thanks for the info.

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