Hi Guys-

So I am trying to do a Headgasket on my 1994 Accord EX F22B1 because of overheating issues.

Long story short, I am unable to pull the head and do Headgasket because of '1' Damn bolt

I am drilling on the bolt right now with a Milwaukee drill bit and used engine motor oil as a cutting oil.

I am kind stuck now, not sure how to completely remove the head of the bolt, so I can pull the head?

Please have a look on the pictures and advice, I am kinda stump now. Because if I try to drill by using 9/16', it's not removing anything and seem like bolt head is not budging

Thanks in advance for all of your help and advice.

 

did you strip the head of the bolt??? your going to have to keep drilling and go up in sizes tell the head is gone

 

Yes, Head is no more there. Please see in the attached pictures.

Actual size of the bolt is 14mm, I am already using 9/16" and it seems like it's not cutting or maybe it's super slow, if I continue with this pace will finish by next year

Any tip or suggestion? Am I missing something?

 

Drill slow, use a good amount of cutting oil. 10/30 at the least.

 

the head of the bolt is still there your going to have to drill the head off down to the stud

 

Then when all thats done find a way get all the metal out.. Magnet or something good luck

 

drill a smaller hole and slowly step up.

the head bolts are hardened... they will drill hard.

 

Alright, one more thing, should I drill slowly or fast?

Because I started drilling slow and continued with slow speed, but seems like drill is not doing anything or drilling SUPER SLOW.

I am starting with a small bit and then go large with the passage of hole size to finally KILL it.

Please advise about the drilling speed, thanks

 

You may or may not have to sharpen the drill bit, they do wear out over long periods of use. Especially with that hard head bolt. Try sharpening it, personally I would bring it to a machine shop once you're done and have them professionally clean the head.

 

Your going about the drilling the wrong way. (you can tell from the small chips)

Go and buy 5 drills. Start at say 4-5mm and work up in 2mm steps.

Use a battery drill, in gear one. Go as slow as possible, pressing on as hard as you can (without breaking the drill bit). Once the first hole is drilled down into the stud, slowly increase in drill size. You won't need as much pressure at this point.

I'd go easy on the cutting oil to be honest. It'll be washing little bits down into the engine. This is my main concern. (unless your doing a full rebuild) Be super careful to get all the little bits out.

Have fun!

 

You need a carbide bit to get that hardened steel out.

They cost about 10 bucks a piece. Grainger should have them. They're the bronze color bits. Not dewalt bits. Has to be carbide. Those regular drill bits won't do a damn thing. Ill ask my machinist tommorow about another type of bit. They run about 60 bucks a peice but cut hella fast.

Don't let the bit heat up pour lots of oil continuously.

 

I had this problem once so I welded a bolt on top of the head and cracked it loose

 

Thanks so much guys for helping out.

I am using lots of used motor oil, magnetic pick tool to extract all the metal shavings.

I have tried Dewalt Titanium and Milwaukee ones. Also, tried Irwin Cobalt ones but seems like I am kinda stuck, drill bit does not seem to work or its cutting super slow.

Do you know the name/brand of the carbide bit? Have anyone of you ever tried 'Rigid' brand for cutting metal??

Looking forward for a response and reply, much appreciated

 

I don't have a welder, also as you can see from the pictures, I am way past that point

Any other suggestion besides welding? Prolly, drilling is only an option for me or if you have some better suggestion or idea?

 

Just talked to the machinist and you want to get a full carbide steel drill bit. Not the drill bits with carbide tips.

Another thing to do is get a die grinder with a steel grinding bit. It looks like you have enough room. Grind the head of that bolt as best you can.

 

Like this one http://www.amazon.com/gp/aw/d/B000PJ...sr=8-4&pi=SL75

 

Thanks so much Turbo, appreciate it.

Does you or anyone else has any experience with masonry drill bits?

http://rc.runryder.com/helicopter/t3.../?p=4155052#RR

http://www.6x6world.com/forums/gener...ned-steel.html

Any feedback?

 

masonry bits wont do anything for you...at all.

 

maybe this will help you sharpen your bits if you have a grinder or belt sander

 

If it hasnt been said enough already, you need full CARBIDE bits, and most likely a few of them. Keep the speed slow and use moderate pressure. Chances are you have hardened that thing to the fullest and really dont have any other option. You need to let the bit cut into the metal slowly and without adding heat to it.

NO MASONRY, WOOD, TITANIUM TIPPED, PURPLE CHROME DIPPED bits are going to work on this, and method is extremely important. If this doesnt work you will need to get your car to a shop that is familiar with this. Also hand sharpening your own bits wont do the job either. Start with a quality bit and dont waste your money on junk gimmicks.

 

wow, you have really hacked this thing up trying to get it out...as others have said, CARBIDE...its the only thing that will cut through hardened steel like that, so work from small and step up to the required size

not sure if you have tried this yet, but it looks like your bolts are standard hex head and you rounded them out, did you try using a stripped bolt socket like the one in this link? looks like you still have some slight corners left on your bolt head, so you may beable to get one of these on there and get some good leverage to break it loose

http://www.sears.com/craftsman-10-pc..._tnt=39869:4:0

 

Guys, a quick update.

Thanks so much for all the help, cooperation and guidance.

Gladly, I am able to crack the bolt head and pulled the head.