Opinions on the 4.9l I6 motor? - TCCoA Forums
 
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post #1 of 12 (permalink) Old 05-07-2008, 09:01 PM Thread Starter
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Opinions on the 4.9l I6 motor?

I'm about to get a 1993 F150 with a 4.9l strait six motor. Any opinions on them? I'm just wanting to know this won't nickel and dime me to death.

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post #2 of 12 (permalink) Old 05-07-2008, 09:04 PM
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Every single one I have seen has been bullet proof motor wise.

04 PI swap,SVO Supercharger 8-9 psi,Alcohol injection,39lbs Cobra injectors,XCal2-Walbro 255 LPH fuel pump,4.10 T-Lok,2003 4R70W built to withstand by RobertP,450hp JMOD,3800 circleD stall,trucool 4739 Trans Cooler,Dynotech 3.5 Driveshaft,70mm T/B,SCP Cold Air Intake,90mm LMAF,JBA headers,Magnaflow Midmount,No cats with 3inch piping,Vogtland 1.6inch drop,Cobra R's and xenon body kit.

Its slow, Really.
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post #3 of 12 (permalink) Old 05-07-2008, 09:34 PM
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post #4 of 12 (permalink) Old 05-07-2008, 09:40 PM
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great motor, I have heard them running without oil for a bit and having no prob, or running without antifreeze and no major problems, just dont run it out of both. Those motors are amazing, why ford ever got rid of them I have NO IDEA.

Now here is another option for ya, I had a I6 but got rid of it when I got my 2000(didnt need t2 trucks, haha who am I kidding, i have 3 in the yard right now, ok didnt need 4) Dont know if you are intersted but I have a gasket match port job for intake and exhaust manifolds and also a FelPro gasket kit to go with it. Just to open up the air flow a bit more to help your motor breath.

$160 and its yours, but like I said dont know if thats anything you or anyone else on here is intereseted in.
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post #5 of 12 (permalink) Old 05-07-2008, 10:05 PM Thread Starter
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I may be interested once I get the truck. According to Wikipedia the 4.9l is "renowned for its durability, low end torque, and ease of service."

http://en.wikipedia.org/wiki/Ford_Straight-6_engine

Sounds good too me. Plus they had 260lbs of torque, which isn't too bad.

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post #6 of 12 (permalink) Old 05-07-2008, 10:48 PM
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Good motor, my '87 F150 four wheeler is powered by one. Great low end torque but power sucks...runs out @ 3500rpms, not a single rpm more. You can feel a SHARP drop in power after that. I've had the motor since I was 17 and stayed a daily driver for 2 maybe three years. Never once had any problem out of the motor.

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post #7 of 12 (permalink) Old 05-07-2008, 11:05 PM
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Everything else on that truck will fall apart twice before you have to do anything to that engine. I used to know a guy whose father had a 300 I6 that was on its 3rd truck. The trucks would rust out and fall apart, and he would pull his engine out and swap it into the next truck. At the time I knew him, he said he had about 600K miles on the engine, and he never had more than the valve cover off of it.

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post #8 of 12 (permalink) Old 05-08-2008, 06:58 AM
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Yup, it's a rock. Not the greatest fuel economy miser for some reason, but solid as can be.

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post #9 of 12 (permalink) Old 05-08-2008, 08:27 AM
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Yep, very reliable. I knew a guy who had a couple of them, they would not die. The last one he turned over to his son to use for his salvage yard delivery vehicle and as far as I know they are still using it. When he got a newer F150 after they went to the v6 he would not get the v6 and went with the 4.6 v8.

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post #10 of 12 (permalink) Old 05-08-2008, 09:16 AM
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Quote:
Originally Posted by MadMikeyL View Post
Everything else on that truck will fall apart twice before you have to do anything to that engine. I used to know a guy whose father had a 300 I6 that was on its 3rd truck. The trucks would rust out and fall apart, and he would pull his engine out and swap it into the next truck. At the time I knew him, he said he had about 600K miles on the engine, and he never had more than the valve cover off of it.
Agree.

Years ago... actually decades ago... dang I'm getting old... it was like this:

If you're buying a Ford truck and want:
An engine that will last forever, but isn't good for hauling heavy loads, get the I6.
An engine that will be pulling heavy loads, get a big V8.

Those 240/300's last FOREVER!!!

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post #11 of 12 (permalink) Old 05-08-2008, 09:27 AM
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Head over to www.fordsix.com. More information than you could ever wish to know: history, mods, etc., etc. Great place for Ford straight-6 enthusiasts.

1991 LX Thunderchicken
4 wheels/tires, A motor/ transmission, few seats and gauges
Yep, she's got it all
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post #12 of 12 (permalink) Old 05-08-2008, 10:42 AM
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Awesome motor. Not a powerhouse or a gas sipper, but the BEST all-around light truck motor ever made. These motors are designed for torque, not HP.

I've got a carbureted '79 that I've added 4v holley, Offy intake, higher ratio rockers, 3.50 gears, and EFI exhaust manifolds. Along with the new high flow exhaust, it scoots along pretty well and tows anything I need it to. It'll even set you back in the seat as I go through the gears. I like it, plus it is dirt simple to work on

Any older used vehicle has the potential to be a money pit, so look carefully when you buy. The main compalint of the EFI models is the slave cylinder in the maual tranny F150 trucks. The tranny has to be dropped to replace it.

i bought the truck with the intention of putting in a 460 and pulling the 6, but then I started driving it. Then I read about a few simple mods that'll truly wake it up...
Good thing I kept it and didn't go with the 460 considering gas prices. I get 16 mpg around town. I pulled a camper with it last month and it pulled better than my '98 Exploder.

Everybody likes pics, so here are a few of mine:




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'79 F100 SB : 300 ci six, Hurst Mastershift 3spd floor shifter, Offenhauser intake, Holley 4 brrl, EFI manifolds, Chebbie Rockers, Summit Racing 3.50 gearset, DISO 2.5" diesel muffler and 2.5" exhaust, Its'a six?!

Last edited by ThunderB; 05-08-2008 at 10:54 AM.
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