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Old 03-10-2011, 02:25 AM
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thronsonskip
1975 F250 Crewcab 6.9 IDI diesel install

Well as requested by a member on here I am going to post details of my diesel motor install in a 1975 f250 crew cab that was equipt with a 360 gas engine & 4 speed stick from the factory .

This install will be a 84 f250's international IDI 6.9L engine. I chose this truck because i purchased it and drove it for a year or 2 with the intentions of putting this engine in my 75 crew cab as the 360 was a gas hog and i wanted to get into diesels.. now this isnt a high dollar build or a show truck, but its a truck I plan on keeping for years and years.. and i wanted to keep it simple with a mechanical diesel non turbo-ed so if something went wrong i could easily fix it in the boonies.

The 84 f250 i purchased for 500$ it had a 4 speed stick, a dana 70 u rear end, a 6.9 diesel and that crap TTB front end... it had if i remember right close to 200,000 miles on it and ran like a top.

Here is a picture of my 75 crew cab when i got it years ago, the second picture is me with the front clip off of it getting ready to pull that 360 and sell it, the 3rd picture is the 360 itself was a good engine ran real nice, make a guy a good deal on it for 100$
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7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
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Old 03-10-2011, 02:28 AM
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thronsonskip
Now came the fun part i love tearing thing apart.. not so much putting them back together tho.. hehe this was all done in the fall in my backyard and driveway.. yes my neighbors love me..

Here is the diesel engine after cutting up the 84 truck sitting in my carport.

and now here is the cross member from the 84 getting ready to be modded to go in the 75's frame

and here is the 75 with a happy empty engine bay.


my story telling isnt so hot.. so bear with me. this was 4 or 5 years ago also.
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7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
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Old 03-10-2011, 02:35 AM
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thronsonskip
So now came the creative part.. im no expert i know many will probably refer to me as a hack hehe for this type work. but its done and i drive it and its holding up so no complaints here.

I cut the original cross member out of the 75 and cut the rear of the frame from the 84 and welded it over the sides of the 75s front frame to give some more strength and box in the ends of the old cross member i cut out. plus if i ever wanted to remove this and go back to stock it wouldnt be so bad, just cut the main chunks out and grind the welds back down to original frame..

So then i proceeded to cut the 84 cross member out that held the diesel in the frame rails and it also supported the TTB from the bottom so this piece was massive, i removed quite a bit of the bottom of it to clear the dana 60 front axle pumpkin, wouldnt be a issue if you lifted it, but this trucks plenty high for me and i want to tow with it so a large lift isnt a option.

heres the pics of the pieces tacked on the sides and the crossmember laying in the middle for positioning. also a pic of cutting of the stock 84 piece
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7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
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Old 03-10-2011, 02:39 AM
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thronsonskip
Now shes ready for some engine fitting to locate the crossmember front to back..

I went ahead and put the engine in and bolted it to the trans to give me a spot to tack it where she should be!

pic celebration of getting past the fab, then 2 pics f the engine in the location with the front clip off waiting for tack and final welding
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7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
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Old 03-10-2011, 02:43 AM
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thronsonskip
Ok now came the hydro clutch mods for the 84s bell housing to go in the 75 since the 84 was hydro and the 75 was linkage.

I drilled a hole in the fire wall for the master cylinder and located it where i thought it should be by the pedal, then i welded the nub from the 84 pedal to the 75 so it would have the mount for the rod and it worked like a charm!, had to reinforce the firewall just incase with some old rv bumper steel i had laying around.
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7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
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Old 03-10-2011, 02:46 AM
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thronsonskip
So now i went back to the engine and pulled it, dont have a picture, then i finish welded all the parts of the crossmember for the engine and routed the hydro clutch line and portected it in spots that i was concerned with it rubbing.. dropped the engine back in, bolted it all up.

heres the pics of it welded, and then of the finished truck ready to roll
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7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
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Old 03-10-2011, 02:49 AM
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thronsonskip
and here she is the following summer on a fishing trip with a friend form outa state thats him in the picture, i also swapped in at the time the dana 70u rear end so i have 355 gearing.. plenty of power and around 15mpg city and 20 mpg highway big difference from the 360, it loves pushing 35" tires even..

i love it, and it does me find for now.. putting another in a 78 bronco now too

the 2nd picture is a picture of it this year..

thanks for reading my story. dont be afraid to send me some reps!

Skip

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7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
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Old 03-10-2011, 10:52 AM
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Great write up I will find it very usefull in putting the 7.3 idi and zf5speed from my donor truck into my 78 f350 4x4 conversion.
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Old 03-10-2011, 03:05 PM
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thronsonskip
Quote:
Originally Posted by 79F150/F600 View Post
Great write up I will find it very usefull in putting the 7.3 idi and zf5speed from my donor truck into my 78 f350 4x4 conversion.

your welcom, hope u liked it, i can go into more detail in areas if u need it
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7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
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Old 03-12-2011, 05:30 PM
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thanks for writing this up, I am doing one on a 75 f-250 4x4 in my garage right now, just about got it all stripped out. I'm going to use a zf 5 speed though with mine. I never thought of using the crossmember out of the newer truck, I'm going to try that, but I'm not going to cut the original crossmember, I'm going to try and add it behind it. I'm using a 7.3 non turbo from an 88 f-superduty.
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Old 03-13-2011, 12:12 AM
FayetteCountyCowboy FayetteCountyCowboy is offline
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Great build! I've been trying to find a 6.9 for my F250 but they're scarce.
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Old 04-25-2012, 05:02 PM
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thronsonskip
boy the 6.9 are a dime a dozen here, i buy them up when ever i can, last one was 250$ with entire truck.
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7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
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Old 10-14-2012, 09:52 AM
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Very cool write up....this is very tempting, in fact I may look to do this!

Nice truck by the way!
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http://www.foks.com/forums/album.php?albumid=23173&pictureid=129197Jeff.
1977 Ford F150 Ranger 4x4(Ol Big Red)
6" suspension 3"bl 400 4sp
38" Super Swamper TSLs
1979 F250 Ranger 4x4 (BANDIT)
IH 7.3 idi Diesel, E4OD
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Old 10-15-2012, 01:47 PM
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Originally Posted by BORDERBUM View Post
Very cool write up....this is very tempting, in fact I may look to do this!

Nice truck by the way!

you can do it! and it beats the he// outa the 360 that was in there to begin with!
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7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
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Old 10-15-2012, 01:47 PM
 
 
 
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