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Ive changed plugs on 3 4.6s all which had 80,000+ and several years on the plugs with no problems. 2 DOHC, one SOHC.
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Jul 4, 2013 19:02
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Wasn't it mostly the 5.4 that had those problems?
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Jul 4, 2013 19:23
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Raluek posted:Wasn't it mostly the 5.4 that had those problems? Yeah, the 4.6 you couldn't keep the plugs in, the 5.4s you couldn't get em out.
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Jul 4, 2013 19:38
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The blowing plugs thing seems like one of those massively overstated internet jokes to me. Look at the number of 500+HP stock headed 4.6 DOHCs running around.
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Jul 4, 2013 19:49
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Ford's mod motor plug issues start with the fact that there are too few threads in the aluminum head for the plug. Then it's a cross between the plugs staying in the head untouched for way too long and hamfisted idiots damaging the threads when the plugs are removed a/o new ones installed. I've had to do a head job on each (4.6, 5.4, 6.8) because of blowouts, all with a similar story. "I/A shop just did plugs on it one week/month ago!" E: Actually, I lied. The 6.8 blowout was on a van, with the stock plugs still in it, belonging to our agency that we were about to get rid of so I did the iffy "threaded insert and super long plug" kit fix. Joe Mama fucked around with this message at 20:20 on Jul 4, 2013 |
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Jul 4, 2013 20:17
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I had a 5.4 F150 for 6 months. I got rid of it after two plugs blew out and made the truck sound like an industrial air compressor. Ford, while not admitting that there is a problem, makes a tool for cutting threads and vacuuming out the shavings all without taking the head off.
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Jul 4, 2013 21:04
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CarForumPoster posted:The blowing plugs thing seems like one of those massively overstated internet jokes to me. Look at the number of 500+HP stock headed 4.6 DOHCs running around. My stock 320HP Cobra decided to randomly poo poo out a plug one day. It was six months after I bought the car.
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Jul 5, 2013 03:50
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Powershift posted:Yeah, the 4.6 you couldn't keep the plugs in, the 5.4s you couldn't get em out. As far as I know, the 4.6 and 5.4 use the same heads. The difference was in the 2V vs 3V motors. 2V would blow plugs out, on the 3V, the plugs would break off in the head and you have to use a special tool to get them out.
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Jul 5, 2013 07:01
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emptyspace posted:As far as I know, the 4.6 and 5.4 use the same heads. The difference was in the 2V vs 3V motors. 2V would blow plugs out, on the 3V, the plugs would break off in the head and you have to use a special tool to get them out. Pretty sure they're different but probably similar. Sold a head to a shop the other day and when he changed his mind that it was a 5.4 and not a 4.6 it was a different (and more expensive) part number. When Dorman makes a plug repair kit for your engine (even including a new plug!) and multiple tool companies make specialty tools for hosed plugs, you have a design problem.
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Jul 5, 2013 23:42
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emptyspace posted:As far as I know, the 4.6 and 5.4 use the same heads. The difference was in the 2V vs 3V motors. 2V would blow plugs out, on the 3V, the plugs would break off in the head and you have to use a special tool to get them out. There is a TSB about plug removal in the 5.4l 3V heads. Follow it exactly, and you should have minimal problems. In brief, let the engine go full cold while soaking the plug wells in carb cleaner overnight. The cleaner will wick down the threads and soften the carbon buildup, but you will still have to carefully work the plugs out. YMMV, but in the last couple of years, I've only had to use the special removal tool a couple of times.
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Jul 6, 2013 03:37
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emptyspace posted:As far as I know, the 4.6 and 5.4 use the same heads. The difference was in the 2V vs 3V motors. 2V would blow plugs out, on the 3V, the plugs would break off in the head and you have to use a special tool to get them out. the modular motors are not made out of modular components, there is relatively little shared parts content. they're made on a modular assembly line: i.e. the line can be converted from 2v/4.6 to 3v/4.6 to 2v/5.4 overnight. afaik the truck engines with the exploding heads were 5.4 2v
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Jul 6, 2013 17:14
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Notorious b.s.d. posted:the modular motors are not made out of modular components, there is relatively little shared parts content. they're made on a modular assembly line: i.e. the line can be converted from 2v/4.6 to 3v/4.6 to 2v/5.4 overnight. Yeah, I know that modular refers to the assembly line, not to the motor itself. But I also know that the 5.4 is basically a 4.6 with a taller deck. Like the 351w vs the 302w. I've seen on other Ford-specific forums where people say the heads interchange, but I'll take Fuzzkill's word if he says the shop told him they're different. I've never actually compared a 4.6 2v head to a 5.4 2v head, so I probably should have just kept my mouth shut.
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Jul 6, 2013 21:44
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While I don't have any pictures, I just witnessed a very strange mechanic(al) failure. I'm waiting to turn left, and I see a late second gen Camaro ahead of me lose a wheel. So I go straight through the intersection instead of turning, and ask the driver (wearing a three piece suit without the jacket) if he needs a hand. He frowns and says "Lemme think about that" as he pulls his wheel out of the ditch. Then he gets back into the car and fuckin' floors it down the road, dragging the right front brake disk. So there I am, about to offer him a jack, standing in his cloud of dust, next to his wheel (which he left in the road). I drive home via the road he took and never saw him again, what a strange fellow. I guess he was late for whatever he was going to? But he didn't even throw his wheel in the trunk. 
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Jul 6, 2013 22:55
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Raluek posted:While I don't have any pictures, I just witnessed a very strange mechanic(al) failure. I'm waiting to turn left, and I see a late second gen Camaro ahead of me lose a wheel. So I go straight through the intersection instead of turning, and ask the driver (wearing a three piece suit without the jacket) if he needs a hand. He frowns and says "Lemme think about that" as he pulls his wheel out of the ditch. Then he gets back into the car and fuckin' floors it down the road, dragging the right front brake disk. So there I am, about to offer him a jack, standing in his cloud of dust, next to his wheel (which he left in the road). I drive home via the road he took and never saw him again, what a strange fellow. I guess he was late for whatever he was going to? But he didn't even throw his wheel in the trunk. Who the hell drives a plastic fantastic camaro and wears a three piece suit?
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Jul 6, 2013 22:59
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MrYenko posted:Who the hell drives a plastic fantastic camaro and wears a three piece suit? Man, I don't even know. Someone in a hurry, I guess.
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Jul 6, 2013 23:03
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Worlds most dapper car thief?
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Jul 7, 2013 00:28
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MrYenko posted:Who the hell drives a plastic fantastic camaro and wears a three piece suit? 2nd gens were not plastic, mister  
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Jul 7, 2013 00:48
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MrYenko posted:Who the hell drives a plastic fantastic camaro and wears a three piece suit? A defendant.
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Jul 7, 2013 00:54
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I don't own a camaro of any kind, but I did drive my Comanche to a job interview wearing a full suit a few weeks ago. Yes, the beat up, lifted, rotted, mud covered one with speed tape holding the tail lights on. The double takes going down the highway with KMFDM blasting and my arm out the window were glorious. kastein fucked around with this message at 01:00 on Jul 7, 2013 |
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Jul 7, 2013 00:58
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Devyl posted:2nd gens were not plastic, mister  
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Jul 7, 2013 01:12
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Touchè, good sir.
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Jul 7, 2013 03:43
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I had a friend in high school who had a '73 with the split front bumper. drat good looking car. His was a bit more rusty, though.
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Jul 7, 2013 03:57
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The low down on mod motor heads: 4.6 SOHC 2V: 92-98 (later for town cars) NPI heads (boat anchors) 99+ PI heads 98 Ford SVO head 4.6 SOHC 3V: 2005+ Mustang Heads 4.6 DOHC: 93-98 B-port heads 99-03? C-port aka Tumble port heads 02 FR500 heads 03+ Cobra/Terminator heads Cobra R Cyl heads 5.4 SOHC 2V and 3V 03+ Truck heads 5.4 DOHC 99+ Tumble port navigator heads Ford GT and Shelby GT500 heads 5.0 DOHC: Coyote heads of course in the new Mustang 5.8L heads in the 2013 GT500...know nothing about em 6.8L V10: Has 2V and 3V versions but who cares cause this engine sucks. CarForumPoster fucked around with this message at 04:08 on Jul 7, 2013 |
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Jul 7, 2013 04:04
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CarForumPoster posted:The low down on mod motor heads: 90% sure the australian v8 falcon had this engine for a while, it was criticized for being enormous, heavy, slow-revving and based on a pickup truck motor when compared to the LS2.
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Jul 7, 2013 09:56
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Slavvy posted:90% sure the australian v8 falcon had this engine for a while, it was criticized for being enormous, heavy, slow-revving and based on a pickup truck motor when compared to the LS2. I think most of the criticism was comparing it to the turbo 6
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Jul 7, 2013 10:29
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dissss posted:I think most of the criticism was comparing it to the turbo 6 I'm thinking about the time I walked into an engine builder's and there was one sitting on a pallet on the floor, and without being prompted the proprietor gave me a little lecture about how poo poo they are. But the criticism was definitely in comparison to both the I6 turbo and the LS2, I remember that distinctly.
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Jul 7, 2013 10:33
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I saw some scary poo poo on the highway yesterday. It was a lady driving a late 90's Chevy with some sort of catastrophic front suspension failure. The front drivers side wheel was cocked in at a ridiculous angle. She was just bombing along at about 60 with her hazards on and smoke pouring off of that wheel. I can't imagine driving that car and then deciding to get on the highway for a nice trip in that rolling road hazard.
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Jul 7, 2013 10:52
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Slavvy posted:90% sure the australian v8 falcon had this engine for a while, it was criticized for being enormous, heavy, slow-revving and based on a pickup truck motor when compared to the LS2. Ford GT seems to be pretty good.
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Jul 7, 2013 11:13
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CarForumPoster posted:Ford GT seems to be pretty good. It's also supercharged 
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Jul 7, 2013 21:33
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Slavvy posted:It's also supercharged Ahh yea I wouldn't use an NA mod motor over an aluminum block LS motor ever and I love mod motors. ...ones with turbos
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Jul 7, 2013 21:35
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It's hard to believe, but In the US for 3 months ford sold it's second smallest car with a 252hp/270ft/lb 2.0T i4 and the same time it's largest car was sold with a 239hp/287hp 4.6l v8. cheap engines have come a long way in the last few years. edit: here's a mechanical failure, this is what it takes to write off a 40,000km, 2006 BMW M5. 
Powershift fucked around with this message at 22:28 on Jul 7, 2013 |
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Jul 7, 2013 22:24
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Powershift posted:It's hard to believe, but In the US for 3 months ford sold it's second smallest car with a 252hp/270ft/lb 2.0T i4 and the same time it's largest car was sold with a 239hp/287hp 4.6l v8. cheap engines have come a long way in the last few years. Especially hard to believe considering how protective Ford was of the Mustang during the late-90s through the mid-2000s. To the point where the Focus was the only model in the SVT lineup to not offer forced induction when pretty much all of their competitors (except for Honda and Nissan) were offering some version or another of a hot hatch/sport compact with a turbo or supercharger. And then there's the upcoming Fiesta ST to consider. Ford has done a radical 180 from their position of "if you want a fast car it must have 8 cylinders" of 5-10 years ago.
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Jul 7, 2013 22:33
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Slavvy posted:90% sure the australian v8 falcon had this engine for a while, it was criticized for being enormous, heavy, slow-revving and based on a pickup truck motor when compared to the LS2. The FPV V8s had their own heads which were made in Australia. The V8s used in the stock Falcons (BA and BF) were the three valve truck head. The Mod V8s were criticised in Australia for being too high revving actually, and having no real low down torque like the Falcon six or LSx.
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Jul 7, 2013 23:22
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I really wish I didn't have to post in this thread this often, or really ever. However, I noticed some looseness of a piston in a 350 I got from craigslist about a year ago, in order to limp me a few hundred miles home. Turns out the "just rebuilt 20k miles ago" engine is not in super great shape. I've only taken the driver's side bank apart so far, and this is what I've found: There are more than a couple things wrong here. This is the piston that felt loose as I was trying to scrub off the carbon buildup from the top.  Surprisingly, this is not the same cylinder.    Crank journal to go with the above.  How does this even happen?  Yea, that's not good.  Something that's not very apparent from this picture is that one of these rods is the odd man out, totally different casting. Also marked as a second cylinder #1, but is in hole #3. Also also, the rod that was in hole #5 was marked #6. Great. Frankenmotor.
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Jul 8, 2013 02:25
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AlternateAccount posted:So am I the only one who's first experience jacking up a car was with one of these? I lost a good chunk of my finger in one of those.
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Jul 8, 2013 02:30
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"Rebuilt 20k miles ago"* *By my brother Cletus for a case of Bud Ice.
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Jul 8, 2013 03:16
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Raluek posted:
I can't wait to see the passenger bank.
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Jul 8, 2013 03:41
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Seat Safety Switch posted:Thank you for the reminder that "rebuilt engine" doesn't mean properly rebuilt. Yeah, so now I have to replace this motor, so back to Craigslist! At least I know now to check all of the rod bearings before purchase, instead of just one. Also to not ignore that alarm in the back of my head that goes off when all of the gaskets are RTV. But, when you have to have a motor this weekend, sometimes some precautions get silenced. As for the passenger bank, it actually looked much better. Two rods marked "#2", so that means they are ordered "1" "2" "1" "2" "6" "5" "7" "8". Well, that many punch dots, anyway; the rebuilder didn't seem to have a set of numbered punches onhand. Except for one of the "#1" ones.  The culprits. Also shown: The Butt Doctor rattlegun. Love that thing.  I made an imgur album of all the pics from this side, because there's nothing nearly as catastrophic as the other side, but all of the bearings definitely look like hell: http://imgur.com/a/2t1HD The only one that is worthy of this thread is this guy:  Plus the horrible mechanic failure of having the compression ring gaps right next to each other.
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Jul 8, 2013 04:39
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The rings spin around when the engine is running. Gap placement is a bullshit old wives tale
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Jul 8, 2013 11:08
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Powershift posted:It's hard to believe, but In the US for 3 months ford sold it's second smallest car with a 252hp/270ft/lb 2.0T i4 and the same time it's largest car was sold with a 239hp/287hp 4.6l v8. cheap engines have come a long way in the last few years. I'm amazed at how little it takes to total a car these days. A couple of weeks ago my buddy banged up his SRT-4. Worn tires + rain + whatever unholy amount of power that thing is making now = making love to a guardrail. No mechanical damage whatsoever. Just a banged up front fender and a nice deep scrape across the doors and back fender. Even though those cars seem to hold their value well its very much totaled. I've been trying to convince him to buy it back and swap the engine into a K-car.
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Jul 8, 2013 17:41
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