Hi,
From a while back, Tom @Loaded68W34 , you said I had the original nylon teeth gear. I'm going to get it replaced, while the mechanics do the flex plate and all the "while you're at it" things. They did ask, do I know for sure? I said the guys who know, know. But just curious, what is it in the pics that you can tell?
It was from this post, also with a video.
https://classicoldsmobile.com/forums...3/#post1383684










Thanks!

 

The yellow in the 3rd picture is nylon. If the motor is coming out they should pull the oil pan and clean deep inside the oil pickup. The old teeth go up in there and are hard to see but restrict oil flow.

 

For reference, here is a nylon gear:


Here is a steel gear:

 

Loaded...where did you find a nylon gear intact?

 

Thank you both!

 

There is a few out there yet. I found two 76 Olds 350's without any cracks or missing nylon and a 83 307 as well.

 

That is a pic of the motor that I built for my 72 hardtop when I was tearing it down. The motor was in a 1968 olds 98 that sat from 1985 until I bought it in 2018 and had only 20,000 miles. Here is a thread I made a while back with more pics of the tear down. It is by far the cleanest motor I have ever taken apart.

https://classicoldsmobile.com/forums...inside-148380/

My 68 toro motor with 80,000 still had the nylon gear in it as well. The second pic above showing the steel gear is my Toro motor going back together.

 

I replaced the timing set on my '69 Cutlass S a few years ago. It has the low compression 350 with approximately 80k miles. The timing set was in great shape. Not a crack or sign of degradation in the nylon coated cam sprocket. I almost hated to change it - but I did.

 

I know I should replace mine! Only 61k original miles, I don't beat on it, and it's a Delta 88 350 so low compression.

Hope it doesn't blow apart on me...