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.

[Aayala]

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.

Great info! Thank you! Yeah... I took everything apart and left the fan hub on there not aware that it would have been better to remove while on the engine and just had some 3 jaw pullers that fit nicely in the bolt hole with a centering pin. It did give out pretty quickly after i pulled it so not sure if it was me but I do not think it interferes I just don't want to have it have any play so If i can find a fan hub replacement for cheap then I will look into it! Found one online for like 130 bucks and don't think I want to spend that much on that.

[Superhawk996]

Spend a little time - read the thread link, especially post #14

The condition of the hub nose is very important on these engines and yours isn’t looking great. This is a commonly neglected area of rebuilds and can have ugly consequences if the fit isn’t right.

http://www.914world.com/bbs2/index.php?sho...363970&st=0

Spend the time to do it right while it’s still easy to do.

[Montreal914]

How is the surface where the seal rides on?