rebuilding a 7.3

PSDEng · Feb 12, 2013

It doesn't necessarily have to be in the truck. It could be run on a stand if you fabbed up a stand that you could bolt the motor mounts to. Kinda like a mock frame

littleredstroker · Feb 12, 2013

I guess I was misleading... Yes im on a budget, if I had the $ I would just buy a new motor for 5k and be done with it. I want a new motor, one I can run for 300k@ 550+ hp . I don't want to be pulling motors out every 100k because that's all it lasted. There is nothing wrong with my motor now ( other than pmrs) and I guess I want the piece of mind that it has a NEW motor ...1000$ for a rebuild kit is in my budget .

sent while trying not to JJ My rods!!!!!!

littleredstroker · Feb 12, 2013

I have no idea how the previous owner maintained it, or what shape the bearings and such are in, even with good compression lots of other stuff could go wrong no?

sent while trying not to JJ My rods!!!!!!

lincolnlocker · Feb 13, 2013

well ***, why didnt you say your current motor was fine? take the obs motor and start doing to that what you want.. thats a no brainer... especially since you dont NEED it in right away... then as budget allows more goodies add them... tear it down, check tolerances, hell it may just need a slight hone job maybe a 10 over kit, put in a rebuild kit with the piston bowls machined, all your superduty parts and drive on man.. that was way simpler.

live life full throttle

littleredstroker · Feb 13, 2013

lincolnlocker said:
well ***, why didnt you say your current motor was fine? take the obs motor and start doing to that what you want.. thats a no brainer... especially since you dont NEED it in right away... then as budget allows more goodies add them... tear it down, check tolerances, hell it may just need a slight hone job maybe a 10 over kit, put in a rebuild kit with the piston bowls machined, all your superduty parts and drive on man.. that was way simpler.

live life full throttle

Sorry lol. Is the hone job something I can do or do I need to have a shop doing, and what is the piston bowl machining for .I see u can have it either way

sent while trying not to JJ My rods!!!!!!

lincolnlocker · Feb 13, 2013

if you have never done it, prolly should watch and learn from a shop. gotta make sure everything stays even and smooth.. bowl radius machining takes the square edge from the factory bowl and radius's it smooth to help stop hot spots and cracking... or it will look like this.. look close to the 12 and 6 o'clock positions on both pistons... all 8 of mine are like that..

littleredstroker · Feb 13, 2013

What about head work, what needs to be done woke heads are off?

sent while trying not to JJ My rods!!!!!!

lincolnlocker · Feb 13, 2013

just make sure they are nice and flat.. have valve train gone through to see if anything needs replaced.

littleredstroker · Feb 13, 2013

If they are not flat, how much machining can be done to the heads safely

sent while trying not to JJ My rods!!!!!!

PSDEng · Feb 13, 2013

Make sure that there aren't any cracks between the valves. It's not a real common occurence on these heads...but it'd sure make me sick to look over something so simple to check for and put a head back on the truck. IF it were ME....I'd have them pressure tested, magged, and new cups put in....but that's just me. Shoot I might even opt for a light port and polish job.

littleredstroker · Feb 13, 2013

PSDEng said:
Make sure that there aren't any cracks between the valves. It's not a real common occurence on these heads...but it'd sure make me sick to look over something so simple to check for and put a head back on the truck. IF it were ME....I'd have them pressure tested, magged, and new cups put in....but that's just me. Shoot I might even opt for a light port and polish job.

What's something like that cost ball park

sent while trying not to JJ My rods!!!!!!

PSDEng · Feb 13, 2013

Hard to say with the port and polish, but the mag job and pressure test with new cups should be able to be done for ~$500 give or take.

Meniacal_Mark · Feb 13, 2013

Yup, looks like your valves gave your pistons a little mushroom stamp.

lincolnlocker · Feb 13, 2013

did you notice the cracks in my pistons too?

live life full throttle

TyCorr · Feb 13, 2013

lincolnlocker said:
did you notice the cracks in my pistons too?

live life full throttle

That was my initial realization. Wow....hot tamales.

lincolnlocker · Feb 13, 2013

***ed up thing is pyro has only been above 1500* maybe twice... and that is my dumb azz fault.. this setup never got hot unless i made it...

live life full throttle

littleredstroker · Feb 13, 2013

lincolnlocker said:
***ed up thing is pyro has only been above 1500* maybe twice... and that is my dumb azz fault.. this setup never got hot unless i made it...

live life full throttle

Makes me want to pull my heads just to see... Mine sees 1600 daily .

sent while trying not to JJ My rods!!!!!!

lincolnlocker · Feb 13, 2013

id be more worried about pmr's then the pistons... all the pistons cracked in dam near the same exact spot.

live life full throttle

littleredstroker · Feb 13, 2013

lincolnlocker said:
id be more worried about pmr's then the pistons... all the pistons cracked in dam near the same exact spot.

live life full throttle

And machining piston bowls helps prevent this?

sent while trying not to JJ My rods!!!!!!