Breaking Bolts

The block will transfer the heat from a propane torch away so quickly that you could not damage the block if you tried hard. Just watch out for rubber and plastic parts nearby.

OK! thanks Wally....
I'll give it a go this weekend.

joe

OK... here's the report...

I happened to talked to Clint, at Kaman Industry Technologies while I was ordering some Kroil penetrating oil. Clint, who is also a machinist, suggested trying the Loctite Freeze and Release product, instead of throwing heat on the frozen bolts. They didn't happen to have it in stock, so I ordered the Loctite product to be in next week. While on the way home I stopped at O'Riley's. They had another version of the freeze the bolt product, CRC Freeze off. Both of the products appear to do the same thing... cold + a penetrating lubricant.

I as amazed at what the Freeze Off did! With a little working and a couple of cycles of freezing, my corroded bolts came out! And they were corroded! It was astounding!

I now have my bolt removal strategy for remainder of my project. I'll try the Loctite product next week. I have no reason to think that it wouldn't work as well or better than the CRC product. I found YouTube demonstrations of both products.

I'm not endorsing anything, of course, just reporting what happened. I hope it's useful to others. Here's the follow on picture of one of the stuck bolts already out and the other on the way out.

joe

Attached files [img]media/attachments/17554=2561-IMG_0457.jpg[/img]

Right on! and thanks for the information, please post a link to the product.
The cold works on the same theory as the heat.
The aluminum housing and the steel bolt expand and contract at different rates.
Like wally say it would be hard to get the housing hot enough to expand as the steel bolt will expand faster by collecting most of the heat.
It was adding the lubricant during the cooling off that one Hoped the corrosion would start to break off.

Now Why The Freezing worked better.
Same as above because the broken steel bolt changes temp faster than the aluminum and therefor shrinks faster than the aluminum housing.
This seems like the best method.
I have just never heard of any success stories at home.
In the shop where I work we use nitrogen and you can dam near shake the bolt out.

Thanks again and please post pictures and links in your car profile thread

Sure... here are some links:

CRC Freeze Off is what I used this weekend. I picked it up at O'Rielly's

crcindustries.com/auto/?s=05002





The other product that I'm going to try when it comes in is Loctite's Freeze and Release:

www.henkelna.com/loctite-freeze-release-7008.htm





I'm brand new to being a 928 owner and the club. I'll get my project up on the Profiles.