rebuild 7.4 turbo diesel Navistar Internatioal

the hauler died. cracked manifold from eather backfire. didn't know, a lot of gravel roads sucked dust into engine. how much cylender wear can be corrected from new rings. comp read 200# on all cylenders. haven't taken engine down yet we plan to this weekend. any web sites dealing with these engines. Thanks :lol:

Fordtrucks.com

Better yet

www.thedieselstop.com

If the crosshatch is gone you will need to bore, the machinist needs to be familiar with these engins as they are not the same as a gasser.

Chances are the valves are sunk as well.

Try powerstrokeforum.com or .org i cant remember.or just do a search for powerstroke forums you will find it.that fordtruck forum is good also.good luck

Better yet

www.thedieselstop.com

Can't beleave it my web address is banned from there site. I've never been there befor so it can't be somthing i done. i sent them a email and asked for a reply. Thanks for the help see ya

donald :?

they changed the format which for one I cant stand. Pretty much that place has gone in the crapper. Still some good advice if you mcan sort through the posts and put up with the overmoderation.

might try here www.powerstrokenation.com the hardcrore from TDS have gone there. Tell 'um bigblockhorse sent ya............

Just a thought.
Go to your local, large truck stop + pick up a copy of the truck paper. I haven't looked lately, but there were several vendors offering 7.3 new crate motors decently priced. Some with core exchange, some not.
Did you mention ether? Why would you use ether this time of year. + if you used enough to cause a backfire, dag gum! You may have bigger problems waiting to come out.
I agree with the other poster too. If it backfired, the valves are prob. toast.
try taking an oil sample. Take it to a Speedco. Have them analize the sample. (call ahead to be sure they can do 7.3's.)
You sure you didn't overheat the manifold by cranking up the fuel to it + it cracked from the heat?

they changed the format which for one I cant stand. Pretty much that place has gone in the crapper. Still some good advice if you mcan sort through the posts and put up with the overmoderation.

might try here www.powerstrokenation.com the hardcrore from TDS have gone there. Tell 'um bigblockhorse sent ya............


I've read where ford had 50,000,000,000 dollars in warnty work on this engine and caused them to cansel their contract with int. do you suggest any of fabion upgrades that can address any of the factory problems.

While the 7.3 had its share of concerns, the 6.0 has by far had a lot more and is the reason for problems between Ford and Navistar. Depends on what you are after, engine longivity? power? both? One could address the poor factory intake, chocked exhaust, poor fuel system, and a few other items. The transmission has its share of flaws as well.

Just a thought.
Go to your local, large truck stop + pick up a copy of the truck paper. I haven't looked lately, but there were several vendors offering 7.3 new crate motors decently priced. Some with core exchange, some not.
Did you mention ether? Why would you use ether this time of year. + if you used enough to cause a backfire, dag gum! You may have bigger problems waiting to come out.
I agree with the other poster too. If it backfired, the valves are prob. toast.
try taking an oil sample. Take it to a Speedco. Have them analize the sample. (call ahead to be sure they can do 7.3's.)
You sure you didn't overheat the manifold by cranking up the fuel to it + it cracked from the heat?

my brother can break a cannon ball with a rubber mallet! don't know where he hot the stuff from i throwed the last bottle of eather away i thought. any way it's his truck and he sprayed it down good i guess:
when i take the oil sample to speedco and have the oil analized what am i looking for . O'yea his is a powerstroke 7.4 or 7.6 mine is a lowlly 7.3 stright 185 hp with 300.000miles and still a virgin other than the radiator and vacume pump. its a 93 what happend inbetween with int. i don't know but i've eaten a lot of crow by bragging on the int. brand because of mine and now by starting to work on my brothers' i'be found out that there has been a lot of problems with the powerstroke brand. Befor i thought the difference was the addition of a turbo and that was it. but i dought that know. does any one know anything, have the problems been corrected, what years are affect by the defects. any way the brand has been layed and i guess i've been lucky. May god bless ya and peace be with ya.

don:

While the 7.3 had its share of concerns, the 6.0 has by far had a lot more and is the reason for problems between Ford and Navistar. Depends on what you are after, engine longivity? power? both? One could address the poor factory intake, chocked exhaust, poor fuel system, and a few other items. The transmission has its share of flaws as well.

My brothers' 7.4 or 7.6 not sure of the engine disp.is the broken one but it's an f350 powerstroke turbo duely around 97 to 2000 year and he had trans problems befor. mine is a 7.3 non turbo navistar 93 year and is a virgin. had to replace trans at 250K i am always pulling 50hp tractor rhino bushog front end bucket loader and box blade or disk (13,000lbs) 185hp overdrive off 55mph 2.2Krpm. pretty much flat ground down here in La.
suits me fine!














































1

I'm no powerstroke guru, but my 2001 Super Crew had a 7.3. I'm only aware of three diesels that Ford used and of those the 7.3 was in my opinion the best one. It was easy to get to, easy to uprate everything (easy, not cheap!) There were a whole bunch made and there are as many still on the road plugging away at 500,000 miles plus. (I've heard someone has one with 1.3 million on it.
The oil analysis tests a whole bunch of stuff. Most metals (all the important ones like copper, lead, tin, iron, alum. etc.) fuel, water, soot, oxidation, viscosity.
I would think that with all the hotshots on the road, that they would be able to do the smaller diesels. (Thats why I said to call ahead + ask. Save a trip.) I believe there's a Speedco in Hammond. Check their website.
Now, this is what ether does to motors. I causes cylinders to heat up super fast. Strips any lube that was there. Pre detonates severly. The more ether used, the bigger + more severe the damage done. It will cook the fins off a turbo, get metal so hot it gets brittle, melt, or burn the tops off pistons.
Thats the purpose of oil sampling. To try to find out the extent of damage done, or being done, without cracking the engine open.
Think of it as putting something like a can of Pork + Beans in a microwave. It cooks from the inside out. It sounds cool, up to the point of bursting.
This is why they took ether injectors off semis. Too many guys thinking if a little is good, a lot must be great.
yes, overuse of ether will cook the tranny. I'm willing to bet that if he's used that much ether just for fun, the cylinders, oil galleys, bearing journals, turbo are in very poor shape. It's like dumping brake cleaner into the crank case.
If the Bro is after HP. Tell him to think twin turbos. Banks exhaust. HP chips. + many more upgrades / uprates.

I like

http://www.blackstone-labs.com/

You can call them up and they will send you a sample container to put your oil in. Send it back and they can tell you anything you want to know.

There was the 6.9IDI, 7.3IDI, Turbo here up, 7.3DI, 6.0DI and now the 6.4.

I'm no powerstroke guru, but my 2001 Super Crew had a 7.3. I'm only aware of three diesels that Ford used and of those the 7.3 was in my opinion the best one. It was easy to get to, easy to uprate everything (easy, not cheap!) There were a whole bunch made and there are as many still on the road plugging away at 500,000 miles plus. (I've heard someone has one with 1.3 million on it.
The oil analysis tests a whole bunch of stuff. Most metals (all the important ones like copper, lead, tin, iron, alum. etc.) fuel, water, soot, oxidation, viscosity.
I would think that with all the hotshots on the road, that they would be able to do the smaller diesels. (Thats why I said to call ahead + ask. Save a trip.) I believe there's a Speedco in Hammond. Check their website.
Now, this is what ether does to motors. I causes cylinders to heat up super fast. Strips any lube that was there. Pre detonates severly. The more ether used, the bigger + more severe the damage done. It will cook the fins off a turbo, get metal so hot it gets brittle, melt, or burn the tops off pistons.
Thats the purpose of oil sampling. To try to find out the extent of damage done, or being done, without cracking the engine open.
Think of it as putting something like a can of Pork + Beans in a microwave. It cooks from the inside out. It sounds cool, up to the point of bursting.
This is why they took ether injectors off semis. Too many guys thinking if a little is good, a lot must be great.
yes, overuse of ether will cook the tranny. I'm willing to bet that if he's used that much ether just for fun, the cylinders, oil galleys, bearing journals, turbo are in very poor shape. It's like dumping brake cleaner into the crank case.
If the Bro is after HP. Tell him to think twin turbos. Banks exhaust. HP chips. + many more upgrades / uprates.

Ok i finally got bro to clean the valve cover and give me the cid of the engine it is a 7.3 turbo 1993 and thanks for the speedy oil info we are on it now.

How about posting an update once you have found out something.

How about posting an update once you have found out something.

well we started pulling the engine saturday, according to the gurues at powerstrokediesel web the 92-2003 i think will interchange as long as the truck is not a california truck then there is an issue with injectors. the year may be off i think it was up to 03. any way we are going to remove the turbo befor we can pull the engine not enough room.

How about posting an update once you have found out something.

well we started pulling the engine saturday, according to the gurues at powerstrokediesel web the 92-2003 i think will interchange as long as the truck is not a california truck then there is an issue with injectors. the year may be off i think it was up to 03. any way we are going to remove the turbo befor we can pull the engine not enough room.

The only differance with the CA. truck is it uses split shot injectors. If your truck is a Ca truck you can have someone reprogram your computer to run single shot injectors.

I do believe they are all spilt shot injectors 99 - up. Before they started making the "big oil" pumps the mod was to run single shot injectors. So I think you will be fine any way you go!

the powerstroke DI did not come into production until 94.5, those trucks were all 5 speed manuals. If your engine is a 92 it will be an IDI turbo, not the same thing. Just be sure you are getting the right motor.

Pay attention to the last two posts. These guy's know their stuff.

I'm also interested if you did the oil sampling.

I use sampling regularly on my semi. It prob. saved me $8k in core charges this year. (I was getting fuel in my oil, and copper started showing up.)

Pay attention to the last two posts. These guy's know their stuff.

I'm also interested if you did the oil sampling.

I use sampling regularly on my semi. It prob. saved me $8k in core charges this year. (I was getting fuel in my oil, and copper started showing up.)

I don't know about all that now!! I know just enough to get into trouble! :lol:

If that truck is indeed a 1993, it is NOT a Powerstroke, it is a 7.3 IDI, like your truck has, with a turbo on it.
Does this thing have an injection pump on it, or not? Spin on cannister style fuel filter or insert style? Is the sir filter on top of the engine in an aluminum housing, or on the inner fender?
Does it have a plastic cover over the front/top of the engine?
Does it look like this?
http://i16.ebayimg.com/01/i/000/bc/73/484b_3.JPG
That's a factory turbo 7.3 IDI

Or this:
http://i8.ebayimg.com/06/i/000/b5/d3/551a_3.JPG
http://i6.ebayimg.com/06/i/000/bb/e2/cd79_3.JPG

That's a 7.3 PSD, and the truck is not a '93