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2001 F-150


 
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avant 1735
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Joined: 22 Aug 2015
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PostPosted: Mon Dec 04, 2017 7:38 am    Post subject: 2001 F-150 Reply to specific post Reply with quote

Working on my sons truck, replacing belt tensioner. Problem is I broke one of the tree bolts that hold it in place. The
block is aluminum. I welded a nut on the the broken bolt twice and twice it broke off. What am I doing wrong. I am
hesitant to try and drill the bolt for fear the heat from welding has crystallized the bolt. ANy suggestions are
greatly appreciated.
 
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Sean Feeney
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Joined: 11 Jul 2008
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PostPosted: Mon Dec 04, 2017 7:47 am    Post subject: Re: 2001 F-150 Reply to specific post Reply with quote

drill it out slow plenty oil
 
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DoubleO7
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PostPosted: Mon Dec 04, 2017 8:19 am    Post subject: Re: 2001 F-150 Reply to specific post Reply with quote

If I could weld a nut back on, I would and really get it red hot via welding.
Then as it cools off, spray it down with PB Blaster at entry to block as soon as it is cool enough not to boil the PB off. Give it a squirt every 20 or 30 seconds.
Theory being the PB will be drawn in as it cools off.
Then if I had an air chisel I would hit the very end of the stud/nut liberally to jar it loose.
Then impact wrench it out.
 
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JRSutton
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Joined: 10 Jun 2011
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Location: Sutton, MA

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PostPosted: Tue Dec 05, 2017 8:23 am    Post subject: Re: 2001 F-150 Reply to specific post Reply with quote

Put it back in with two bolts instead of three. :)

Only half joking. I don't like to hack stuff, but if something's being a pain the butt, I'm not sure I'd go that extra mile for a 2001 truck (and I own a 2001 f250), unless it's in really nice shape and going to be around for a while. I would think two bolts on the tensioner would be adequate.

If anything, I might try an extractor in that case. The heat from the welding will have loosened the bolt, so chances of snapping the extractor will be lessened.

if you do snap it, you're still back to two bolts which will probably be fine, so I don't think you've got much to lose.

use a cobalt drill bit to make your life easier.
 
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DR. EVIL
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PostPosted: Thu Dec 07, 2017 11:43 am    Post subject: Re: 2001 F-150 Reply to specific post Reply with quote

I've heard guys suggest using a left hand twist drill that will try to spin the broken end of the bolt out. Auto parts store might have them, or check MSC supply.
 
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4play
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PostPosted: Thu Dec 07, 2017 10:16 pm    Post subject: Re: 2001 F-150 Reply to specific post Reply with quote

Did the bolt head snap easy like the bolt just failed or was it real tight? All 3 of those bolts go into the timing cover so be careful not to damage that. If the welded nut keeps breaking off, it sounds like the weld isn't penetrating the broken bolt. I'd really consider using the 2 good ones and forget about the third, especially if the broken one is in the middle. Plenty of vehicles/engines have tensioner setups with staggered or offset 2 bolt mounting

I'm not sure if it would be worth buying a set but I have what are called "twist sockets" These are the equivalent of a ez out extractor except they are for rounded nuts/bolts or studs. If you go this route just make sure the set has small enough sizes
 
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