Catastrophic failure - Ford Bronco Forum
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post #1 of 90 (permalink) Old 06-12-2019, 10:36 PM Thread Starter
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Catastrophic failure

I'm sure some of you know that I have a busted 460 that's currently sitting in the bed of my F100 after being removed from my other truck. I blew it up maybe 5 years ago or so and it's been sitting ever since. I'm going to try and salvage parts off of it for a possible future build. I figured I'd share my slow adventure into finding out what's good, what's bad, and wth went wrong.

I haven't had time to strip it down yet, but I did spend a couple minutes earlier today popping off the valve covers to take a look at things.

The first thing I thought of after I took the passenger side valve cover off was @351w500 's signature. "I got roller rockers" DAMMIT!!




Notice anything wrong in this picture?


.
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post #2 of 90 (permalink) Old 06-12-2019, 10:59 PM
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one of those rockers aint sittin' on the valve correctly.
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"I got roller rockers" DAMMIT!!
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post #3 of 90 (permalink) Old 06-12-2019, 11:02 PM Thread Starter
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Quote:
Originally Posted by 351w500 View Post
one of those rockers aint sittin' on the valve correctly.

Bingo. Here's another angle.






Gee. I wonder where that went....
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post #4 of 90 (permalink) Old 06-12-2019, 11:06 PM
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Wow!

μολὼν λαβέ

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post #5 of 90 (permalink) Old 06-12-2019, 11:09 PM
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the tip is busted off of the pushrod ??

"I got roller rockers" DAMMIT!!
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post #6 of 90 (permalink) Old 06-13-2019, 01:45 AM Thread Starter
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Quote:
Originally Posted by 351w500 View Post
the tip is busted off of the pushrod ??
No, the whole pushrod is gone.


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post #7 of 90 (permalink) Old 06-13-2019, 10:45 AM Thread Starter
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Here's the other bank.








Same thing on that side. The 7th rocker from the front is missing its pushrod. The 8th one on this side is bent and I'm able to lift up the rocker just about as much as the 7th one with no pushrod. So, obviously whatever has destroyed itself on the bottom end is in the rear.
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post #8 of 90 (permalink) Old 06-13-2019, 11:08 AM
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this should be a fun thread to follow
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post #9 of 90 (permalink) Old 06-13-2019, 11:26 AM Thread Starter
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Originally Posted by dash_cam View Post
this should be a fun thread to follow
lol. yeah. I'm sure it'll be insightful for people who've never seen an engine that's gone boom.


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post #10 of 90 (permalink) Old 06-13-2019, 04:06 PM
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and at the same time......all booms are insightful.

"I got roller rockers" DAMMIT!!
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post #11 of 90 (permalink) Old 06-13-2019, 04:51 PM
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Man that's crazy! I had a 460 throw a rod through the block. That was a loud bang!

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post #12 of 90 (permalink) Old 06-13-2019, 08:07 PM Thread Starter
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Originally Posted by BigBlue 94 View Post
Man that's crazy! I had a 460 throw a rod through the block. That was a loud bang!
This one didn't really make a loud bang, but it sure made a lot of white smoke when it burned off all the oil in the crankcase after something went through the oil pan. I'm assuming there's a broken water jacket as well since the contents of the radiator went out the hole in the oil pan when it happened. We shall see!

I'm feeling really burnt out today after being in the JY in the hot sun, but I'll probably go out to the truck and hit the intake bolts with the impact and see how awesome that lifter valley is gonna look. I guess I gotta remove the distributor first though. At least everything is easy access with it sitting in my truck bed. I wonder if anything hit the distributor shaft...
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post #13 of 90 (permalink) Old 06-14-2019, 12:00 PM Thread Starter
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I guess I don't need to pull the distributor first. Not sure why I thought that. Maybe I was thinking of a different engine. Either way, I attempted to remove the distributor, but the gears wouldn't unmesh. I could get the housing to come up a bit and it'd rotate 360*, but the rotor wouldn't budge. I'll have to come back to that.







The intake stayed on pretty well over the years. I didn't want to scar the aluminum, so I found that the rtv along the china walls was nice and soft still and I was able to slide a flat head screwdriver through it and break the seal. Then I grabbed the rear vacuum fitting with one hand, the front coolant fitting for the heater hose with the other, and it came up and out.



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post #14 of 90 (permalink) Old 06-14-2019, 12:17 PM Thread Starter
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It's getting really interesting now.







Is it just me or does it look like from front to back in the holes in the valley you can see camshaft, camshaft, camshaft, no camshaft? Oh boy...
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post #15 of 90 (permalink) Old 06-14-2019, 01:05 PM
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Did the lifters fall into the crankcase too?

That's definitely a catastrophic failure

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post #16 of 90 (permalink) Old 06-14-2019, 01:37 PM Thread Starter
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Quote:
Originally Posted by BigBlue 94 View Post
Did the lifters fall into the crankcase too?

That's definitely a catastrophic failure
My internet is being really stupid at home right now. I have more pics, but I can't get them loaded to imgur to post.

I'm not sure if any fell into the crankcase, but one definitely exploded. I was able to pick up some pieces of it. I found a small steel ball like the kind in a ball bearing. I think that's from inside the lifter as well.

I didn't notice anything that resembled a pushrod, so I'm assuming stuff exploded and the rods fell into the void below.

I think I nailed the thread title. With all the metal pieces laid out in the lifter valley, and the size of some of it, I'm surprised I'm not seeing any gaping holes in the block yet. Maybe the initial blast was downward and then when everything rotated back up it shot all these pieces through the already existing holes.
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post #17 of 90 (permalink) Old 06-14-2019, 11:09 PM Thread Starter
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Here's a few more shots of the carnage.





I added the nickel, in case you guys think it blew up into some change. Even though, that would have been nice to get some money back.










Some debris in the ports.







However, the bottom of the intake looks to be in good shape. I didn't give a thorough inspection, but other than metal bits flying out of the ports as I lifted it, turned it, and set it down, it appears unscathed.



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post #18 of 90 (permalink) Old 06-15-2019, 07:51 AM
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I'm a little late to the party, not sure how I didn't see this thread but when you said you couldn't get the distributor out, it sounded like you had cam issues.
That being said, your lifter valley, heads and valve train look really clean so just curious if this was a fresh rebuild. If so, are they the correct valve springs for that cam. Also, supposedly Comp Cams had a bad bunch of cams for these motors, or at least so I am told.

Curious to see how the rest of it looks after you tear it down, hopefully you can save the block, but even then, you'd have a whole lot of cleaning to do (oil passages, etc...) otherwise you just might end up with another expensive paper weight.


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post #19 of 90 (permalink) Old 06-15-2019, 08:09 AM Thread Starter
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Quote:
Originally Posted by cobrajoe View Post
I'm a little late to the party, not sure how I didn't see this thread but when you said you couldn't get the distributor out, it sounded like you had cam issues.
That being said, your lifter valley, heads and valve train look really clean so just curious if this was a fresh rebuild. If so, are they the correct valve springs for that cam. Also, supposedly Comp Cams had a bad bunch of cams for these motors, or at least so I am told.

Curious to see how the rest of it looks after you tear it down, hopefully you can save the block, but even then, you'd have a whole lot of cleaning to do (oil passages, etc...) otherwise you just might end up with another expensive paper weight.


Oh buddy, this is a guaranteed paper weight. I had this engine built by a local machine shop back when I was pretty green to the automotive world and definitely new to what a rebuild entailed. I think I was about 22 or 23 at the time, 2004-2005 ish I think was when it was rebuilt, and saved up a bunch of money to get my beloved F150 back on the road with a lot more horsepower of course.

The odometer never calculated things accurately after it was rebuilt since I had different sized tires and the "new" trans I put in it had a different gear in it than the factory one I started with. Having said that I'd say I destroyed this engine about 5 years ago with maybe 40k on the clock. It was a decently strong runner (dyno said 427hp 510tq at the crank) and this happened at about 5500 rpm, so... maximum damage for sure. I'll get around to popping off a head soon enough.
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post #20 of 90 (permalink) Old 06-15-2019, 08:13 AM Thread Starter
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PS. I beat the crap out of that engine. I won't lie. This is the kind of stuff I did to it back in the day. I think this was six months to a year after I had it rebuilt. Filmed with a potato of course.




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