How to destroy a 440
- Thread starter Meep-Meep
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Yep sure did! I just thought it may have been a little rude asking for her to pose for pics.
come on man...... you have no security cameras? no potty cam?
Now I know why you work by yourself Mark.
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Now I know why you work by yourself Mark.
he advertised the goods, and didn't produce......... I was just trying to help
ChargerChad
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Those don’t look anything like 440 Source heads. These are my new Stealth heads going on my 440 build.
Lance Holloway
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Great looking car. Horrible engine failure. I would think she would be going back to the seller to complain of the shoddy engine work they did and get some compensation on the rebuild.
PRHeads
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Not that it really matters at this point, especially since it will be getting new heads…….
But, my take on whether or not they are Stealth heads(based on the currently posted pics)……
If you look at the end of the head in this pic, you can see the bosses for the alternator mount, like what factory heads have.
All of the other similar style aftermarket aluminum heads I’ve seen have the ends of the heads machined smooth & flat.
Of course, a few other pics would clear up any doubts.
Looks like the pushrod holes have been relieved as well.
As for the comments on 6000rpm and 400 miles…….
What do you guys think happens when a new engine goes on the dyno?
I can tell you for a fact…….there’s waaaay less than 400 miles worth of run time before going to WOT and max RPM.
If the failure was indeed RPM related, some parts used for the build weren’t suitable for that RPM……regardless of how long the break in period would have been.
But, my take on whether or not they are Stealth heads(based on the currently posted pics)……
If you look at the end of the head in this pic, you can see the bosses for the alternator mount, like what factory heads have.
All of the other similar style aftermarket aluminum heads I’ve seen have the ends of the heads machined smooth & flat.
Of course, a few other pics would clear up any doubts.
Looks like the pushrod holes have been relieved as well.
As for the comments on 6000rpm and 400 miles…….
What do you guys think happens when a new engine goes on the dyno?
I can tell you for a fact…….there’s waaaay less than 400 miles worth of run time before going to WOT and max RPM.
If the failure was indeed RPM related, some parts used for the build weren’t suitable for that RPM……regardless of how long the break in period would have been.
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Moms68
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Orig69
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It looks like the failed rocker was on cylinder number 8 where all the destruction started.
I see HP exhaust manifolds in this picture.
I see HP exhaust manifolds in this picture.
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The cylinders look badly scored for an engine with 400 miles on it and there appears to be a crack in the cylinder wall. That’s why I think it was severely overheated. To be fair, it may not be 100% the customer’s fault but it sounds like she was abusing the motor. I would be wary of building her an engine and offering any sort of warranty. Maybe she’d be better off with a crate motor that has a manufacturer warranty. I would also talk her into a rev limiter…
PRHeads
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I’d say the use of what are probably 50+ year old rockers and shafts on a freshly built HP 440 combo was obviously a bad call.
The pic of the spacer in the wrong location in the pic in post #49 is evidence the assembler wasn’t very detail oriented and/or not very familiar with Mopar big blocks.
There is only one reason new rockers weren’t used…….the cost would have cut into the profits.
Heres an observation I find interesting…….
I’m assuming the rocker with the hole in it is off the cylinder with the broken intake valve.
Yet, that rocker would have been on the exhaust valve.
The pic of the spacer in the wrong location in the pic in post #49 is evidence the assembler wasn’t very detail oriented and/or not very familiar with Mopar big blocks.
There is only one reason new rockers weren’t used…….the cost would have cut into the profits.
Heres an observation I find interesting…….
I’m assuming the rocker with the hole in it is off the cylinder with the broken intake valve.
Yet, that rocker would have been on the exhaust valve.
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Orig69
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Yes the rockers do look original you can checkout my other post #12
I believe the rocker failed because of too much metal in the cylinder.
I agree it's a Steal.
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Looks like it to me too. They have the stock-looking casting on the end as Dwayne mentioned, plus in your pic you can see the shiny aluminum rocker pedestal.
What a bummer.
Yes, there is no such thing as a cheap to keep Porsche.If she thinks a 440 is $$$ to rebuild wait until she blows up the 911S ,
I own one and it's 3 times the cost of my mopars
View attachment 1628138
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I've had pushrods punch
thru the rockers on
a completely stock motor
that had been freshly rebuilt,
utilizing the 5/16" pushrods
and stock single valve
springs.
The culprit turned out to be
bad lifters, and a cracked
rocker arm shaft. Though,
I think the shaft cracked due
to the forces applied when
the pushrods punched thu
the rockers.
Bought new shaft
assemblies, 2 new pushrods,
and replaced the lifters
(Speedpro [TRW]).
She's been running fine
since.
I don't believe too high a
valve spring pressure has
caused this young ladies'
engine to crater. My
suspicion would be valve
float (@ 6000 rpm), and
internal parts not having
had the chance to break in
and seat properly.
Even the factory advised
against too high an rpm
at less than 500 miles.
66 Sat
Well-Known Member
Yes but you'd think the dyno operator would warm up the engine properly, apply the full throttle carefully, monitor everything etc. The lady owner sounds like she's just getting in and riding that thing hard...and yes I am talking about the 440.
Lamadogg
Active Member
Nice 911. Love the front fascia add-on!If she thinks a 440 is $$$ to rebuild wait until she blows up the 911S ,
I own one and it's 3 times the cost of my mopars
View attachment 1628138
Lamadogg
Active Member
Yeah, the RPM was 6000 — when she glanced at the tach on its way up to 7,000+. She drove the Charger like her Porsche. You can take revs up to 7,000 easy on a flat 6 no prob — different animal when you jump into the Mopar….
Meep-Meep
дворянин
come on man...... you have no security cameras? no potty cam?
BSB67
Well-Known Member
The valve train seems like an epic fail on the builder’s part. What about the rest of it?
As you step through the teardown, can you share the rest of your findings? What parts were used, and the quality of machining/assembly?
Also curious, do you know where the car is, and how the motor got from the car to your shop?
As you step through the teardown, can you share the rest of your findings? What parts were used, and the quality of machining/assembly?
Also curious, do you know where the car is, and how the motor got from the car to your shop?
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