Author Topic: Can't not get these last 2 bolts out (Read 1376 times)

Ryan66 · « **on:** February 24, 2021, 06:00:26 PM »

Just what the title says. Trying to pull my 550 and the lower motor mount bolt head snapped off. Soaked in pb blaster. Heating with a torch. Smacking it with a punch will not budge. Then the oil filter cover bolt appears to be brass or soft and the head immediately snapped off. Again pb and heat and some vice grips.

Ryan66 · « **Reply #1 on:** February 24, 2021, 06:28:39 PM »

Theres no where to access the motor mount bolt. The nut on the back side pretty much sits flush up inside the motor. I've used tons of heat. It's corroded inside the motor not the frame. I can pry the frwe away from it. I literally can't smack it any harder with a punch

Ryan66 · « **Reply #2 on:** February 24, 2021, 06:29:39 PM »

And is that washer and what used to be the bolt head one piece?

onepieceatatime · « **Reply #3 on:** February 24, 2021, 06:56:10 PM »

Quote from: Ryan66 on February 24, 2021, 06:29:39 PM

And is that washer and what used to be the bolt head one piece?

Yes.
If you have access to a welder, I have had success welding a large nut to the bolt head, and turning it out. The flange on the bolt head gets stuck to the filter housing, and that is what holds it in place. The heat of the welding helps break it lose. If you don't have a welder, slot and heat with a torch as stated above.

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Ryan66 · « **Reply #4 on:** February 24, 2021, 07:09:13 PM »

Quote from: onepieceatatime on February 24, 2021, 06:56:10 PM

Quote from: Ryan66 on February 24, 2021, 06:29:39 PM
And is that washer and what used to be the bolt head one piece?
Yes.
If you have access to a welder, I have had success welding a large nut to the bolt head, and turning it out. The flange on the bolt head gets stuck to the filter housing, and that is what holds it in place. The heat of the welding helps break it lose. If you don't have a welder, slot and heat with a torch as stated above.

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That's the one thing I dont have. I cut a slot In it and tried an impact driver. No go. Think I'm gonna cut the motor bolt off flush to thr motor so I can at least pull the motor. But then I still don't know how I'll get it out. Scratching my head currently lol

goodtryer · « **Reply #5 on:** February 24, 2021, 07:45:55 PM »

It's too late for the broken bolt but for the oil filter bolt, don't try to do it all at once. Think of it like you're thawing it. The rust & gunk & corrosion that is holding in place needs to be fractured and moved in small increments.

Once you get the slot cut in it, just rotate it back & forth (tighter & looser) a few times. Then heat it a little. Then spray some PB in there. And then leave it alone for a little while. Even if it doesn't appear to move, things are flexing and the oil and heat are working. The movement, the penetrant, and the heat will work a little bit at a time. Come back a half-hour later and work it a little more. Eventually it'll come loose. Just need patience.

This is the same idea as with a motor that is stuck from sitting too long. You put a little oil (ATF, MMO, whatever) in the cylinders and then rock the wheel a little. Let it sit, rock a little... Took me 2 days and about 15 minutes of effort over that time to get the last motor freed up.

I've really cut back on the number of broken bolts and stripped or rounded heads since I've started this technique.

Good luck!

Edit to add that you can also get a little movement in the oil filter housing. Rotate that back & forth, however little it actually moves. Every little bit helps.

Ryan66 · « **Reply #6 on:** February 24, 2021, 07:59:52 PM »

I tried moving the housing it doesn't even move a little. Even with the impact driver it didn't move at all. I get what you're saying though. I've heated everything up at least 5 times. Pb blaster each time. Gonna let it sit over night and see if it does anything

754 · « **Reply #7 on:** February 24, 2021, 08:07:37 PM »

Drill the motor mount bolt out.. .. carefully. If you can split the nut with a dremel, then drill with a left hand drill, it may work..
Can it not be driven in , I think on a 750 you can .

Ryan66 · « **Reply #8 on:** February 24, 2021, 08:17:06 PM »

Quote from: 754 on February 24, 2021, 08:07:37 PM

Drill the motor mount bolt out.. .. carefully. If you can split the nut with a dremel, then drill with a left hand drill, it may work..
Can it not be driven in , I think on a 750 you can .

Didn't even think of cutting the nut I'll try thanks. Why can't it be driven in because of the nut not clearing the case?

Ryan66 · « **Reply #9 on:** February 24, 2021, 08:35:35 PM »

Quote from: 754 on February 24, 2021, 08:07:37 PM

Drill the motor mount bolt out.. .. carefully. If you can split the nut with a dremel, then drill with a left hand drill, it may work..
Can it not be driven in , I think on a 750 you can .

Unless I'm not seeing something it looks like it can be driven out. Channel in the case seems to have clearance. No?

scottly · « **Reply #10 on:** February 24, 2021, 08:57:33 PM »

What are you using for a punch, a center-punch? You need a proper sized drift punch.

Ryan66 · « **Reply #11 on:** February 24, 2021, 09:07:57 PM »

I've got a bunch of center punches but I ground the point off the one I'm using. It's same size as the motor mount bolt.

754 · « **Reply #12 on:** February 24, 2021, 09:49:13 PM »

Heating the nut won't hurt .
Yeah a flat end punch near size of bolt , or at least 3/4 the size ... so you dont flare the bolt.

bryanj · « **Reply #13 on:** February 24, 2021, 11:07:32 PM »

You cant "punch" the bolt out without casing damage, you will have to carefully drill it out

Ryan66 · « **Reply #14 on:** February 25, 2021, 04:52:38 AM »

Quote from: bryanj on February 24, 2021, 11:07:32 PM

You cant "punch" the bolt out without casing damage, you will have to carefully drill it out

Why can't you?

Ryan66 · « **Reply #15 on:** February 25, 2021, 06:30:08 AM »

Quote from: calj737 on February 25, 2021, 05:02:00 AM

Quote from: Ryan66 on February 24, 2021, 07:59:52 PM
I've heated everything up at least 5 times. Pb blaster each time. Gonna let it sit over night and see if it does anything
Heated it with what, and how hot? People underestimate how much heat it takes. Propane will barely get it done. And if that's what you used 5x, then step up to MAPP gas. And heat it until the bolt is cherry red. You won't damage a thing. And heat the backside too.

I think you should be able to drive the bolt out as it is not a threaded boss, but be careful else you might break that boss. Gently lift the motor with a floor jack under the oil pan to relieve any stress on that bolt where it may be "pinched" passing the frame as you drive it out.

Ya just using propane. But have gotten it almost glowing orange. The frame moves back and forth on the broke side pretty easily so I don't think it's pinching it. I'm gonna cut the nut and see if it helps. Soaked in pb over night. Fresh spray this morning. Try again tonight.

Ryan66 · « **Reply #16 on:** February 25, 2021, 06:30:31 AM »

The oil filter housing bolt isn't reverse thread is it?

goodtryer · « **Reply #17 on:** February 25, 2021, 07:27:22 AM »

Quote

Ya just using propane. But have gotten it almost glowing orange. The frame moves back and forth on the broke side pretty easily so I don't think it's pinching it. I'm gonna cut the nut and see if it helps. Soaked in pb over night. Fresh spray this morning. Try again tonight.

Is there enough room to get a hacksaw blade on the bolt between the frame & the engine case?

Ryan66 · « **Reply #18 on:** February 25, 2021, 07:40:34 AM »

Quote from: goodtryer on February 25, 2021, 07:27:22 AM

Quote
Ya just using propane. But have gotten it almost glowing orange. The frame moves back and forth on the broke side pretty easily so I don't think it's pinching it. I'm gonna cut the nut and see if it helps. Soaked in pb over night. Fresh spray this morning. Try again tonight.

Is there enough room to get a hacksaw blade on the bolt between the frame & the engine case?

ya u can see in the pic I have a screwdriver in there separating it. And yes I can get a cut off wheel in there. Last resort I'll do that so I can at least get the motor out then drill the bolt out of the case

goodtryer · « **Reply #19 on:** February 25, 2021, 08:12:13 AM »

Coincidently, this was posted yesterday on Jalopnik: https://jalopnik.com/cool-tool-the-mini-ductor-ii-is-like-taking-a-torch-to-1846340614. The article mentions less-expensive generic versions. Maybe there's a way to get the heat directed onto the stuck bolt.

How about an air-chisel/hammer? Not that I'm a fan of the brute-force approach but any port in a storm.

754 · « **Reply #20 on:** February 25, 2021, 12:31:02 PM »

If you drill the nut... in the center, then right thru.. you may be able to get the nut portion to come right out. Start small and you can go bigger than the thread if you don't hit the case, (start small , if off centre , you can steer it to correct..)
If the nut part does come off, then driving broken bolt to outside may be quite easy.

Ryan66 · « **Reply #21 on:** February 25, 2021, 12:34:22 PM »

Quote from: 754 on February 25, 2021, 12:31:02 PM

If you drill the nut... in the center, then right thru.. you may be able to get the nut portion to come right out. Start small and you can go bigger than the thread if you don't hit the case, (start small , if off centre , you can steer it to correct..)
If the nut part does come off, then driving broken bolt to outside may be quite easy.

Sure wish my brain worked in that way. I know exactly what your saying. Keep removing portions of the nut until hopefully it comes out. But i agree the nut is my issue once its gone the bolt should come right out. Im more worried about the filter housing bolt though

bryanj · « **Reply #22 on:** February 25, 2021, 12:42:07 PM »

The nut on the end of the bolt is in a captive slot in the case, punch the bolt you are smashing the nut into the caseing, steel is stronger than alloy and you wreck the casings.
As tothe oil filter bolt hammer a smaller socket onto the damaged hexagon the hammering tends to loosen the bolt

754 · « **Reply #23 on:** February 25, 2021, 12:47:10 PM »

If you can get at the bolt from bottom , you drill thru one, the thread, and partway into other side , once you get thru the threads you may be able to separate the bolt from nut.. , do you have a Dremel tool, it will help get the threads out of the nut..

Ryan66 · « **Reply #24 on:** February 25, 2021, 12:59:26 PM »

Quote from: bryanj on February 25, 2021, 12:42:07 PM

The nut on the end of the bolt is in a captive slot in the case, punch the bolt you are smashing the nut into the caseing, steel is stronger than alloy and you wreck the casings.
As tothe oil filter bolt hammer a smaller socket onto the damaged hexagon the hammering tends to loosen the bolt

Did you see the pic i posted? There is no hex left it snapped off. Its just a soft metal nub now.

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Author Topic: Can't not get these last 2 bolts out (Read 1376 times)