Timing chain shot?

[mountain33]

We finally got some decent weather so I figured i would get around to checking out my timing chain. My 71 383 RR has over 123k miles on it so i figured i would replace the chain and gear set. I am guessing the chain was stretched looks it to me but what do I know. Never did this before. I included pictures of it. Sorry about quality. Bending over trying to hold chain out and take pictures. Taking pictures crippled me up more than working on car. I want to thank all of the members of this group. With out your knowledge from looking at past posts and the help regarding removal. I wouldn't of attempted it. now i just have to wait for parts to arrive. At least it will allow my back to calm down while i wait. Can you tell by pictures if it needed replacement? Big shout out to you all.

 

[radical rob]

Looks like stretched out a bit.

 

[toolmanmike]

We finally got some decent weather so I figured i would get around to checking out my timing chain. My 71 383 RR has over 123k miles on it so i figured i would replace the chain and gear set. I am guessing the chain was stretched looks it to me but what do I know. Never did this before. I included pictures of it. Sorry about quality. Bending over trying to hold chain out and take pictures. Taking pictures crippled me up more than working on car. I want to thank all of the members of this group. With out your knowledge from looking at past posts and the help regarding removal. I wouldn't of attempted it. now i just have to wait for parts to arrive. At least it will allow my back to calm down while i wait. Can you tell by pictures if it needed replacement? Big shout out to you all.

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What do you think? Is it worn out?

 

[toolmanmike]

 

[mountain33]

What do you think? Is it worn out?

to me I'd say the chain is stretched more than worn. Unless talking about me then definitely worn out.

 

[DeltaV]

The factory service manual provides guidance on measuring slack and replacing.

It has 123k miles on it. It doesn't owe anyone anything.

 

[4speed68rt]

Throw a new chain on it. You already got the hard part done.

 

[Big Bad Dad]

The factory service manual provides guidance on measuring slack and replacing.

It has 123k miles on it. It doesn't owe anyone anything.

I don't think that is the original chain in a 1971 383. The cam sprockets had nylon plastic teeth in that time, if I remember correctly. I know my 1970 440 had the plastic, because it came apart and the debris clogged the oil pan pickup screen.

 

[toolmanmike]

Throw a new chain on it. You already got the hard part done.

Now why would you put a new chain on old worn out gears. Timing set components are manufactured to work together.

 

[Mackman]

I don't think that is the original chain in a 1971 383. The cam sprockets had nylon plastic teeth in that time, if I remember correctly. I know my 1970 440 had the plastic, because it came apart and the debris clogged the oil pan pickup screen.

Agree that is not the original chain and gears.

 

[mountain33]

Agree that is not the original chain and gears.

I was wondering that. I thought the same that it would have nylon.

 

[bm02tj]

Put a true roller on and never touch again