Broken Bolts - HELP HELP HELP

I noticed that my Jeep 1982 CJ-5 with 258 inline six. The driver side motor mount only has one bolt holding it on.

There seems to be two bolts that have been broken off in the engine itself.

How can I get them out??? They seem to have been there for quite a long time.


Any suggestions, as always, will be appreciated.

Thanks
Paul-Jr and Paul-3
Father and Sone

 

Re: Boken Bolts - HELP HELP HELP

Pull engine.

Use a set of "EASY OUTS". HEAT the surrounding block prior to trying to turn the ez out. Apply generous break free to the block/bolt for 48 hours prior to trying to turn ez out.

When you break the easy outs off in the block, go to a machine shop and have them do it.

 

Re: Boken Bolts - HELP HELP HELP

Welcome to the subtle nuances of jeep ownership. If you keep your jeep long enough you will have a garage full of tools, and become a pro at removing broken bolts.
I have never had consistant luck with the expensive broken bolt extractors that have a built in drill bit with a sliding collar. They just never worked for me.
The most reliable bolt extractors have a square cross section. They are made by Hanson and come in a handy 5 pack although I will never use the one that requires a 3/8 drill. Its for big bolts.
What I do is soak the bolt with Kroil. You can also heat the area a bit then use your fav penetrating oil. Then I use a sharp center punch (Starrett) then a fresh drill bit.
I hammer the extractor in untill it "pings", then very carefully, turn it with a tap holder, making sure I am applying even pressure, with another dose of penetrating oil.
IMHO I think the round shaped extractors jamb the bolt even more tightly. The ones with the square profile let the broken bolt "unseat" into the recesses of the extractor. Clear as mud?
Simply put, straight flute extractors work better for me than spiral flute ones.

 

Re: Boken Bolts - HELP HELP HELP

If they've been in there for a long time you most likely will have to drill them out and retap the threads. Might as well try extracting them first. If there is enough of the bolt sticking out you can try welding a nut to it and then wrench on it. We've used that at the shop a time or two.

Good luck, get good at it.

Kevo

 

Re: Boken Bolts - HELP HELP HELP

If the bolts look to be in reasonable condition, that is, they don't look rusted in place, I've had good luck with drilling a hole as centered as possible and driving a torx socket in the hole, and backing out with a ratchet. You'll have to decide which drill bit to use. I'd agree with the Kroil or PB blaster. I'd also see about heating the bolt a time or three to expand it and break up any crud holding it together.

Definately a job you don't want to rush through. Let the heat and oil do the work for you.

 

Re: Boken Bolts - HELP HELP HELP

Another tip is to use a reverse cutting drill bit. The reverse spinning of the drill bit will help break the bolt free.

 

Re: Boken Bolts - HELP HELP HELP

Unless you are wanting to learn these sutle nuances of jeeping which are skills that should be possesed by anyone with a Jeep over 5 years in age. I'd just remove the the fenders and hood and tow it to the closest machine shop /engine builder and have them remove them. These guys deal with this kind of thing daily and its not a really big deal to them. Some of them are artist with a small ball peen and a cold chisel and can get it done with just these tools. fwiw .02 good luck

 

Re: Boken Bolts - HELP HELP HELP

Paul and Paul Jr., There has been good advice giving in this thread and I would like to add this.

Removing a broken bolt is not really difficult providing you are patient. If you rush into the job thoughtlessly, you are likely to find yourselves trying to figure out what to do about broken tools stuck inside the broken bolt.

You can follow Maxx description on the removal, but let me add, it is very important that you make sure you center the punch mark, and then drill a pilot hole approximately one half the bolt diameter on center. It is the failure to do these first steps correctly that causes most difficulties with the removal of a broken bolt.

Good luck.

 

Re: Boken Bolts - HELP HELP HELP

All good advice here. If they've broken off flush with the motor mount you might have enough sticking out of the block to get a bite on by removing the motor mount. Just a thought.

 

Re: Boken Bolts - HELP HELP HELP

One more thing to consider....once the head has broken off, there is sometimes nothing holding the remainder in place except friction. Case in point...Years agao, I broke off a 5/16" bolt in my engine block, and I asked my granddad for help. Of course, I had visions of pulling the engine just to get access to it, but he calmly walked over with a small, sharp pick/probe and started to work on simply turning it. About 1 minute later, he had it out far enough to back out by hand, and 10 minutes later, I was driving.

With luck, you'll find this to be the situation....