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Big Mikes 98 Dakota 2.5 Reg Cab 2wd Build Thread

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Old 09-18-2013, 12:20 PM
Bigboi407 Bigboi407 is offline
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Default Big Mikes 98 Dakota 2.5 Reg Cab 2wd Build Thread

Hi guys, i figured since im gonna be here a while, i made an actual account instead of going through my FB, as for those that dont remember me rebuilding my 2.5 engine and then doing all sorts of work to my dakota....


my Dakota sittin, pullin the engine:


Rebuilt Bottom end of 2.5:


Rebuilt 2.5:



Yesterday 9/17/13 Was NOT my day... a Tire nearly fell apart on the way home, i swapped out tires, and went back to my shop, my power steering pump blew up, Then my belt popped off, I left the truck running sitting for a second, and came back to it, drove off and it died, Come to find out, it was hott and my battery was dead, SO someone gave me a jump, i called the only person that could help, No answer, i didnt take notice that the radiator plug had come all the way out and dissapeared, WELL.... i cant sit somewhere or walk too far (im not going into why, but i cant), so i decided to keep on, Motor died out again after spittin smoke out the pipe, then i came to a hault, and This... VVV is the end result VVV



My dads betting the rings collapsed in 1 cylinder... we will see what i find when i pull it out..
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Last edited by Bigboi407; 09-18-2013 at 12:23 PM..
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Old 09-18-2013, 07:08 PM
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98DAKAZ 98DAKAZ is offline
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Over boar it for the largest pistons you can this time

If the cash is available that is

http://www.shop.505performance.com/p...&categoryId=28

Or this kit 2.5/2.9 litter Stroker / Torque Monster

http://www.shop.505performance.com/p...&categoryId=40
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Old 09-29-2013, 10:31 PM
Bigboi407 Bigboi407 is offline
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Quote:
Originally Posted by 98DAKAZ View Post
Over boar it for the largest pistons you can this time

If the cash is available that is

http://www.shop.505performance.com/p...&categoryId=28

Or this kit 2.5/2.9 litter Stroker / Torque Monster

http://www.shop.505performance.com/p...&categoryId=40
^ Thats too much $$$$ for such little power, would a v8 swap be possible into 4 cyl dakota? i suppose the frame is the same, but i mean as far as wiring, fuel delivery, mounts, braces and what not

Last edited by Bigboi407; 09-29-2013 at 10:45 PM..
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Old 10-04-2013, 10:39 PM
Bigboi407 Bigboi407 is offline
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Todays update, Since you Requested Pics, figured id use the digital camera and show you guys whats going on this time









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Old 10-05-2013, 03:54 AM
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Great work

I have a few changes for you that should get you a better running 2.5

1 Change out the 2.5 throttle body for the 4.0 jeep throttle body

2 put a new air temp sensor in that thing yours looks like the original sensor

3 braze that connection and get rid of the suck @ZZ rubber plug they come off after a number of years as the rubber rots then you have a mystery problem that takes some time to figure out.

Click the image to open in full size.
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Old 10-05-2013, 03:58 AM
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I have invested a lot of time into my 2.5 and she runs better than it did stock that's for sure


Click the image to open in full size.

Click the image to open in full size.
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Old 10-05-2013, 07:04 AM
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Originally Posted by 98DAKAZ View Post
I have invested a lot of time into my 2.5 and she runs better than it did stock that's for sure
so what else have you done to the 2.5, I am buying .060" over pistons, i read up about the 4.0 TB a while ago, thank you for confirming my judgement in getting one soon, what else do you suggest? that kit you showed me is a bit too much, but the .060 over pistons run me $135, i suppose the rods in the kit are a different stroke than the original?

throw suggestions, im open to do whatever right now, i even wondered about bigger valves, i do want a new exhaust from front to back, so im gonna look up an exhaust manifold, see what i can find with that

The Cam.... is the 1 thing i did not change, if theres a better cam than stock, and not too $$$$ pricey, id prolly get it
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Old 10-05-2013, 08:53 AM
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Take a good look at the intake manifold

I want to completely remove the useless port with the rubber plug on it as I'm wondering if the brass fitting is protruding into the manifold and causing air restriction/turbulence.

I have also wanted to completely remove the air temp sensor and move it into the air box. I know someone that has tried it and said it helped the high end of the engine most of the new engines have it in the air box like the 4.7 V8.

The reasoning behind it is the same as the useless brass fitting restriction/turbulence on that cylinder intake.

If you get the 4.0 throttle body you will need to open up the manifold I just used a round file if you put the 4.0 on the manifold and look down it you can see its restrictive.

Forget a cam they are no longer available but you can get the roller rockers that give you some lift look for Yella-Terra High Performance Roller Rockers I THINK that's the name.

LINK http://www.quadratec.com/products/51103_501.htm

A good smooth exhaust system will help their is headers but they are not cheap around $400


The best place to look for mods for the 2.5L is Jeep forums as the Jeep used this engine for a number of years.

http://www.jeepforum.com/forum/f12/roller-rockers-2-5-a-1126898/
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Old 10-05-2013, 09:05 AM
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In my pictures you see I removed the big ugly (S) air intake tube and used a straight silicone tube and the top of a (4.7 V8 air box lid) and the accordion air tube with a fitting to connect the thing.

The V8 air box lid is an exact fit replacement for the 2.5L lid letting you remove the restrictive big ugly (S) tube

The V8 lid I got at a junk yard I was lucky and it had the accordion tube on it still and it fits the air hat perfect an exact fit.


The Silicone tube is here and its a 3.25 ID
http://www.siliconeintakes.com/product_info.php?cPath=6&products_id=421&osCsid=bb b82de5c2bb4989bc0a9cb1f5cbe829

I used this connector fitting http://www.siliconeintakes.com/product_info.php?cPath=9&products_id=115&osCsid=7c fbe210a2a5d6e64a69081a940d0b2b

Your oil dip stick will need a little bending so its easy to get to now but take it easy and its not much of a bend in fact you realy don't need to if you don't want its just a little tight is all.

Removing this will get you better air flow but that Big ugly (S) air tube does have a purpose it quiets down the intake 4 banger noise so with it remove you do get a nosier engine but it makes your truck sound cool I think

A word of warning if you do do this you will need to modify your A/C compressor High side tubing by cutting and moving the High pressure sensor switch as its in the way not cheap to do some pic's on this mod you will also need to put two spacers under the air box to lift it just a little

http://s1076.photobucket.com/user/73...?sort=3&page=1



Click the image to open in full size.

The spacers I made out of some of the silicon tubing

Click the image to open in full size.
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Old 10-05-2013, 09:19 AM
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For an exhaust Banks Toque tubs for the jeep 2.5L a friend got them and said they did help... some on the high end

http://www.jegs.com/i/Banks/139/5131...FUfZQgodywEATw

I say just go for the bigger pistons change out the air intake tube and get the 4.0 throttle body and you are good

Check out the air intake manifold also and do those fixes

A 2.5L with the banks exhaust and roller rockers

Click the image to open in full size.
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Old 10-05-2013, 09:19 AM
 
 
 
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