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Stripped Bolt...best extractor set? #5387419 03/27/20 09:27 PM
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TXCarGeek Offline OP
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I'm working on my '89 560SEL currently and while I was removing the oil pan, one of the bolts holding it to the block stripped. It unfortunately stripped without having anything to grab onto so I will need to purchase an extractor set. Do you all have any recommendations on what to purchase?

Luckily I have a ton of clearance and things aren't at an awkward angle. Just want something that will back it out easily.

Re: Stripped Bolt...best extractor set? [Re: TXCarGeek] #5387426 03/27/20 09:36 PM
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buck91 Offline
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I've never had good luck with ANY easy-out style extractor. Whether the type that have the build in drill head with reverse threads or the fluted type. I did find the irwin stripped bolt remover sockets to work reasonably well on a Ford starter bolt that was rounded off once...


2018 F150 Screw 4x4 2.7L Ecoboost
2011 F150 Scab 4x4 5.0L
1996 Mustang GT 5spd/ragtop
Re: Stripped Bolt...best extractor set? [Re: TXCarGeek] #5387428 03/27/20 09:37 PM
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Astro14 Online Content
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I'm having trouble understanding your problem - Did the bolt head round out? Did the bolt shear off? Did you strip the block threads?

For the record, if the bolt broke/sheared off because it was stuck in the block by corrosion, then an extractor isn't likely to work - because you'll have to exceed the torque that caused the bolt to fail in the first place, using an extractor that is smaller than that bolt.

I've broken quite a few extractors without getting anything out.

I drill them out these days, and then Time-sert to repair. Time-sert works great on an aluminum block, which is probably what you're facing at the moment.


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Re: Stripped Bolt...best extractor set? [Re: Astro14] #5387442 03/27/20 09:46 PM
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TXCarGeek Offline OP
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Originally Posted by Astro14
I'm having trouble understanding your problem - Did the bolt head round out? Did the bolt shear off? Did you strip the block threads?

For the record, if the bolt broke/sheared off because it was stuck in the block by corrosion, then an extractor isn't likely to work - because you'll have to exceed the torque that caused the bolt to fail in the first place, using an extractor that is smaller than that bolt.

I've broken quite a few extractors without getting anything out.

I drill them out these days, and then Time-sert to repair. Time-sert works great on an aluminum block, which is probably what you're facing at the moment.


Bolt head sheared off. All of the other bolts came out just fine so I'm not really concerned that there's corrosion holding it in...just seems like a fluke or perhaps it was over torqued by a previous owner.

Re: Stripped Bolt...best extractor set? [Re: TXCarGeek] #5387444 03/27/20 09:47 PM
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Astro14 Online Content
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Well - you might get lucky...if there's not a lot of torque holding it in.

If not, then there is Time-sert - which, although expensive, works really well.


32 Packard 15W40
01 Volvo V70 T5 0W30 AMSOIL SS
02 Volvo V70 T5 0W30 Edge
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05 MB S600 0W40 M1
16 Tundra 1794 5W30 Pennzoil Ultra
Re: Stripped Bolt...best extractor set? [Re: TXCarGeek] #5387446 03/27/20 09:48 PM
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JOD Offline
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I have an old Craftsman set that is no longer made, but I'm pretty sure it was made by Knipex. They where hecho en Germany and looked identical to these: https://www.jbtools.com/knipex-9r4719003-rennsteig-5-piece-double-edge-screw-extractor-set/

Re: Stripped Bolt...best extractor set? [Re: TXCarGeek] #5387452 03/27/20 09:56 PM
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I lucked out...that specific bolt had a nut on the other end that held it in place. Loosened the nut and it brought out the rest of the bolt with it.

Re: Stripped Bolt...best extractor set? [Re: TXCarGeek] #5387455 03/27/20 10:03 PM
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samven Offline
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Now go buy a lottery ticket, luck like that does not come along very often.

Re: Stripped Bolt...best extractor set? [Re: samven] #5387519 03/28/20 01:08 AM
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TXCarGeek Offline OP
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Originally Posted by samven
Now go buy a lottery ticket, luck like that does not come along very often.


No kidding. That bolt happens to go through the ac compressor bracket which is why it has the nut. There's another bolt right next to it that also goes through the compressor bracket and it is missing the nut...someone has definitely messed with things. So annoying when previous owners lose hardware or put things back together without attention to detail.

Re: Stripped Bolt...best extractor set? [Re: TXCarGeek] #5387548 03/28/20 04:41 AM
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Skippy722 Offline
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I know you already fixed it, but I’ve always had good luck using a left handed drill bit of almost the same minor diameter... like a 3/8 left handed drill bit for a 1/2-13 hole. They generally grab the broken bolt after you drill into it a bit and zip it right out without messing up the threads.


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Re: Stripped Bolt...best extractor set? [Re: TXCarGeek] #5387701 03/28/20 09:08 AM
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andyd Offline
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I've broken quite a few extractors without getting anything out.

I drill them out these days, Astro 14

Yep, I have a routine that removes as much of the interior of the bolt with drill bits and then I pry the bolt threads into the hole created. Often, just cleaning up the original threads with a chase is all that is needed. You think my method is slow, try drilling out a sheared EZ out
grin2


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Stripped Bolt...best extractor set? [Re: TXCarGeek] #5388252 03/28/20 07:34 PM
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JLawrence08648 Offline
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I've had good luck with a Snap-On extractor set.


2019 Hyundai Santa Fe SEL Plus, 2.4
1992 Acura Vigor GS, 2.5
Re: Stripped Bolt...best extractor set? [Re: TXCarGeek] #5388417 03/29/20 06:43 AM
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RyanY Offline
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Originally Posted by TXCarGeek
So annoying when previous owners lose hardware or put things back together without attention to detail.

That is true! Lots of people don't bother looking for dropped screws if it still runs. However it is also quite possible that the missing nut is somewhere at a dealer service center. My Ody came back from the dealer with a bolt and nut missing from a wiring bracket under hood, and an Oldsmobile in my former life lost 6 interior screws at the dealership. Apparently they don't care as long as it runs!


2007 Cadillac CTS 3.6L >130k miles; mix of PUP/Magnatec 5W-30 + ACDelco PF2129G

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Re: Stripped Bolt...best extractor set? [Re: RyanY] #5388736 03/29/20 03:04 PM
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Originally Posted by RyanY
Originally Posted by TXCarGeek
So annoying when previous owners lose hardware or put things back together without attention to detail.

That is true! Lots of people don't bother looking for dropped screws if it still runs. However it is also quite possible that the missing nut is somewhere at a dealer service center. My Ody came back from the dealer with a bolt and nut missing from a wiring bracket under hood, and an Oldsmobile in my former life lost 6 interior screws at the dealership. Apparently they don't care as long as it runs!


So far I've had to replace 10 bolts on this vehicle as I've started going through it. Luckily I've been able to find exact replacements at my local Lowes. Also pulled some bolts and screws from some W126s at a pick n pull. I like having extra hardware at hand.

I've had issues with the dealerships losing stuff as well...I make sure they replace it if I find something missing lol.

Last edited by TXCarGeek; 03/29/20 03:05 PM.
Re: Stripped Bolt...best extractor set? [Re: TXCarGeek] #5398385 04/09/20 12:08 PM
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benjy Offline
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knipex makes great tools! expensive but worth it

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