Fan Hub Condition, Engine rebuilding Options

[Aayala]

Hello all,

I am making slow progress on the 1.8L 1975 Engine Rebuild.

So far I have ordered new 96MM pistons and cylinders, valve springs, lifters, push rod tubes, engine seal kit and new front and rear seals.

While taking off the fan hub, I noticed a slight bend in the front part of the groove for the woodruff key and not sure if this is cause for concern? Should I consider replacing this fan hub assembly or is that not enough cause for concern? I used some gear pullers so not sure if that was my doing or not. (IMG:style_emoticons/default/dry.gif)


Also, a picture of the condition of the crankshaft end with a slight ding circled in red and the wodruff key, I am planning on replacing the key of course but not sure if someone used a tool to seat it in place? No cause for concern on the crankshaft correct?


Now dealing with measuring the crank main journals to determine what bearing size to get! slowly but surely...

[930cabman]

From what I can see, just a bit of cleanup (file) to remove the burrs and a new keyway are in order

[Jamie]

Hello all,

I am making slow progress on the 1.8L 1975 Engine Rebuild.

So far I have ordered new 96MM pistons and cylinders, valve springs, lifters, push rod tubes, engine seal kit and new front and rear seals.

While taking off the fan hub, I noticed a slight bend in the front part of the groove for the woodruff key and not sure if this is cause for concern? Should I consider replacing this fan hub assembly or is that not enough cause for concern? I used some gear pullers so not sure if that was my doing or not. (IMG:style_emoticons/default/dry.gif)


Also, a picture of the condition of the crankshaft end with a slight ding circled in red and the wodruff key, I am planning on replacing the key of course but not sure if someone used a tool to seat it in place? No cause for concern on the crankshaft correct?


Now dealing with measuring the crank main journals to determine what bearing size to get! slowly but surely...

Looks like some DAPO hammer peened the key in order to keep it in place? (IMG:style_emoticons/default/huh.gif) (IMG:style_emoticons/default/ar15.gif)

[Jack Standz]

The keyway damage may have been caused by a previous removal. Some take a punch to that area. If it's interfering with reinstalling the fan hub or otherwise bothers you, they are inexpensive to replace.

There is a tool for removing the fan hub. Before I made a tool, I found that three jaw pullers are very difficult to use, mostly because there is relatively little space between the hub and the engine case. Maybe your puller fits better. But, this tool also doesn't tear up the hub or case when used to remove your hub.

You can make it yourself by cutting a rectangular slot in a stout piece of sheet metal/steel. I'd post a photo of mine, but it's hiding somewhere in the garage at the moment. (IMG:style_emoticons/default/smile.gif)


How to use/make a fan hub puller (you can ignore the rest):

https://youtu.be/DZU_-BLDNAU?si=NqYMaEUr_Ievvi78

Edit:

Assumed the case was still assembled and you haven't removed the crankshaft from the case. Of course, if you've taken the crankshaft out, you can use an appropriately sized puller and do t need to make a tool.