Unhappy Ford Bronco wants GT40 heads

OP
CZLoco

CZLoco

artist formerly known as quad destroyer and...
Joined
Dec 13, 2001
Messages
27,422
Location
Austin, TX
Tomorrow's the big day that I start tearing into it to replace the lower intake manifold gasket and other bits.

That reminds me, I should go and spray down some bolts with PB Blaster.
I've read that the two front & two rear bolts on these manifolds often break on removal.
 
Joined
Sep 9, 2002
Messages
5,248
Location
Indiana
Tomorrow's the big day that I start tearing into it to replace the lower intake manifold gasket and other bits.

That reminds me, I should go and spray down some bolts with PB Blaster.
I've read that the two front & two rear bolts on these manifolds often break on removal.
Because the end bolts aren't sealed from the water jackets. If regular coolant maintenance was done then you likely won't have much rust. Also happens to the 4 long water pump bolts that go all the way through the timing cover.
 
OP
CZLoco

CZLoco

artist formerly known as quad destroyer and...
Joined
Dec 13, 2001
Messages
27,422
Location
Austin, TX
That sounds like what I read, yeah!
I just pulled the air intake and plug wires off.
Hit the two front bolts on the intake with PB.
Ran out of PB Blaster. :dash2:
Three cans of it, all at 95% empty.
But none have the whatchamacolit to spray much more than a dribble anymore.
Gonna have to remove the upper intake to get a GOOD squirt of the PB onto the two rear lower manifold bolts.
I may end up using the general-use home depot camping sorta torch on the bolts before trying to break them lose.
Just to make sure they don't break off in any sort of inconvenient manner.
 

Snail

BAMF. No. Really. As BAMF as they get.
Joined
Jan 25, 2002
Messages
19,282
Location
Oregon
Back and forth on the wrench AFTER smacking the head, AFTER atf/acetone. Tighten a bit, loosen a bit...repeat and stop just before the bolt breaks.
 
OP
CZLoco

CZLoco

artist formerly known as quad destroyer and...
Joined
Dec 13, 2001
Messages
27,422
Location
Austin, TX
Good tips, thanks!

Not much progress yet.
Had a lower back spasm while putting on socks this am. Lol

Moving slower than usual now.


:fu: :fu: from my Pixel 3 XL using Tapatalk
 

Rhino

K-9 BAMF
Joined
Dec 12, 2001
Messages
19,002
Location
Fuck you
I keep wanting to upgrade rat jeep but the jeep is running pretty good and I figure I should break some shit by using it then fix what is needed. I did find two rusted out brake lines in the rear near the shocks they are rubber with a metal tube between.. I'll replace them before they pop at an unwanted moment. Only 48 bucks and some brake fluid to replace.
 

BigGar

high on placebo
Joined
Dec 12, 2001
Messages
40,352
Location
Hayabusaland, CA
Back and forth on the wrench AFTER smacking the head, AFTER atf/acetone. Tighten a bit, loosen a bit...repeat and stop just before the bolt breaks.
Exactly. I worked for an old mechanic when I was a kid in Michigan, and I don't remember him breaking rusty bolts very often. He was a master with bleeder screws, which always fucking break off with that Michigan rust. He had really long wrenches for them. I'm talking a 5/16th that was 8-10 inches long. He'd always try to get it to move just a bit tighter before going counterclockwise. Worked like a charm.
 
OP
CZLoco

CZLoco

artist formerly known as quad destroyer and...
Joined
Dec 13, 2001
Messages
27,422
Location
Austin, TX
Ughhhhh the very first bolt.
I did first whack with hammer and tighten, then loo..... CRACK.


:fu: :fu: from my Pixel 3 XL using Tapatalk
 

Master-Cylinder

Duck Loving Curmudgeon and Legendary Race Wrench
Joined
Oct 27, 2003
Messages
52,660
Location
Out in the field
Ughhhhh the very first bolt.
I did first whack with hammer and tighten, then loo..... CRACK.


:fu::fu: from my Pixel 3 XL using Tapatalk

Here's a tip from someone who has removed plenty of broken bolts. Mostly 5mm mixture screws in carbs and a shit load of KZ900/1000 intake manifold bolts. I even made a drill jig for the KZ900/1000 bolt holes because so many people break them off and then come crawling in for help. Drill the bolt all the way out, and if you did it right, you can just run a tap thru the threads. DO NOT TRY TO USE AN EZ OUT, YOU BREAK THAT HARDENED THING OFF IN THERE AND YOU JUST MADE THE JOB 100 TIMES WORSE!. And if you monkey up the threads too much, Heli-Coil it.
 
Joined
Aug 17, 2011
Messages
9,708
Location
Alleged Easy Street
If you center the pilot hole and gradually step up the drill bit size, you usually will get the bolt to back out before your bit fucks up the threads. The pilot hole is the important one.
Centering the bit is easy but the part that fucks me up is getting the drill bit to drill straight through. Do you kinda eyeball it with very small bits and step up, so even if its slightly off center (off axis?), with enough material removed the bolt can come out?
 
Joined
Dec 31, 2001
Messages
24,310
Location
In a shack in a 1-horse town
Do you kinda eyeball it with very small bits and step up, so even if its slightly off center (off axis?), with enough material removed the bolt can come out?
That's how I do it. It's never perfect because I am not billetman or stites. But as you're taking material away, putting heat into it (simply by drilling), and spraying the shit out of it, what's left of the bolt always seems to break loose before the drill bit gets into the threads.
 

Master-Cylinder

Duck Loving Curmudgeon and Legendary Race Wrench
Joined
Oct 27, 2003
Messages
52,660
Location
Out in the field
You wanna take a drill bit the size of the hole, or maybe just slightly larger, and drill it a bit to get the center of the hole you're going to drill almost dead nuts on. And then, if you had a two inch ( or 1.5 inch) steel bar with a hole drilled thru it, and long enough to bolt to another manifold bolt hole, you'd have a guide to keep you straight. I've made a few in my time.
 

Master-Cylinder

Duck Loving Curmudgeon and Legendary Race Wrench
Joined
Oct 27, 2003
Messages
52,660
Location
Out in the field
By the way, have you sealed up those gaping intake holes before you drop a 10mm socket into one?
Working on a guys KTM who thought he dropped a bolt into the spark plug hole. So he stuck a magnet down into the hole and fished around, then broke the magnet off in the cylinder. The magnet then stuck itself onto the steel head gasket where it stayed until the head came off. IDIOT.
 
OP
CZLoco

CZLoco

artist formerly known as quad destroyer and...
Joined
Dec 13, 2001
Messages
27,422
Location
Austin, TX
I heard it break.
And the broken part does look fresh.
But my cell/camera isn't handy at the moment.
I promise to take a pic in the AM though.
It's a heartbreaking thing for me.

I still have more bolts to go.
But this could quite possibly mean I need to remove the heads.
And if I do, then that means I need to spend some cash at the machine shop.
 
Joined
Dec 31, 2001
Messages
24,310
Location
In a shack in a 1-horse town
See if I ever post on a broken bolt thread again!
I haven't had to fuck with drilling out busted bolts for at least a couple years. Until now. I posted about it last night... broke one off tonight. I just snapped off a brass sending unit in the side of an engine block. :fu::screama::fu: :dash2:
What a fucking nightmare this Bravada has been, and I'm just getting started. The good news is it's brass. The other good news is that it's not corroded in place. It's brand new, and I broke the fucker while installing it.
It started out being a two-hour thermostat replacement and went downhill big-time from there. Fuck, I hate life sometimes. I think it's gonna need a head gasket too before it's all said and done. :cool::fu:
 

BigGar

high on placebo
Joined
Dec 12, 2001
Messages
40,352
Location
Hayabusaland, CA
What did you give Hapo for the Bravada, a small beating? Whatever it was, it was too much! At least a sending unit should have a nice hole, right through the middle of it so you can jam a fukin' Easy-out in there and break it off too.
 
Joined
Dec 31, 2001
Messages
24,310
Location
In a shack in a 1-horse town
What did you give Hapo for the Bravada, a small beating? Whatever it was, it was too much! At least a sending unit should have a nice hole, right through the middle of it so you can jam a fukin' Easy-out in there and break it off too.
There was a running joke that Hapo gave his Bravada to me.
But I ended up buying one locally a month ago. The seller seemed a little shady, and I had some concerns about whether or not he was forthcoming about known issues. It's an '02, and it's ridiculously clean. Virginia car, never been in salt. I absolutely hate wrenching on rusty shit piles (which is all you see in northeast Ohio), so I rolled the dice, knowing that it needed at least a few things.

Made the deal. Paid him. Then drove around with him to the title bureau and back to his house. By the time I dropped him off at his house, I knew enough about him that I was certain he had fucked me. But whatever... I can wrench... most parts are cheap, it's clean as fuck... eventually I will get it dialed in, or so I figured.
However, this whole deal has turned into a flaming pile of dogshit. Good chance I will spend more time wrenching on it than I ever will spend driving it.
 

Snail

BAMF. No. Really. As BAMF as they get.
Joined
Jan 25, 2002
Messages
19,282
Location
Oregon
I second whomever mentioned reverse twist drill bits. Yes, they're ALMOST as hard as an easy out, BUT THEYRE NOT TAPERED. The taper on the easy out adds pressure outwards wedging the broken tighter, a reverse twist drill bit is not tapered, consequently it doesnt impart the wedge action.
 

Snail

BAMF. No. Really. As BAMF as they get.
Joined
Jan 25, 2002
Messages
19,282
Location
Oregon
If you want to spend some frogskins on a neat tool Google mag drill.
 

BilletMan

BAMF+
Joined
Dec 29, 2001
Messages
20,095
You got lucky that the sensor seals axially, rather than a radially-sealing pipe thread. One of the few scenarios where an easy-out works....:up:
 
Top Bottom