7.3 injectors
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Senior User
Joined: Apr 2011
Posts: 136
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7.3 injectors
I have a 86 f250 6.9 and my injector pump is going out and i want to swap to 7.3 injectors and pump.my question is can i reuse my return line kit off of the 6.9 if i go with 7.3 injectors.my current lines are only 3 months old
Logistics Pro
Joined: Sep 2007
Posts: 3,737
Likes: 179
From: Western Mass
Yes, the injectors are all the same size. The lines and caps will probably be fine, but you'll need new o-rings.
Go for viton #111 o-rings, they're available from McMaster Carr for pretty like $5
Go for viton #111 o-rings, they're available from McMaster Carr for pretty like $5
Elder User
Joined: Sep 2013
Posts: 594
Likes: 3
From: West Des Moines, IA
Any reason why you want a 7.3 injection pump? Technically, they're a bit different, but the differences are so subtle that you'd never notice anything. A 7.3 pump will work on a 6.9 and vice-versa. If someone told you that you'd get more power out of it by using a "7.3 pump", then they're lying to you, or they don't know what they're talking about.
All IDI injectors fit both engines. There's no engine-specific injectors; just different coded ones with slightly different spray patterns and pop pressures. Just get a brand new set of Delphi BB injectors and you'll be good for another 100,000+ miles.
As far as the return lines though, yes you can use them. Probably want to replace your O-rings though, as was suggested. No point in trusting the used ones when new ones are as cheap as they are.
All IDI injectors fit both engines. There's no engine-specific injectors; just different coded ones with slightly different spray patterns and pop pressures. Just get a brand new set of Delphi BB injectors and you'll be good for another 100,000+ miles.
As far as the return lines though, yes you can use them. Probably want to replace your O-rings though, as was suggested. No point in trusting the used ones when new ones are as cheap as they are.
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Senior User
Joined: Apr 2011
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i swapped pumps yesterday and everything from my 6.9 switched over to the new pump except my 6.9 has a bracket for the kick down lever and the 7.3 does not.i drove the truck to work cause its my only vehicle and it kept down shifting out of 3rd with out the lever hooked up
Mountain Pass
Joined: Feb 2012
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Honestly I would buy an entirely new return line kit from Amazon for 30 bucks. Comes with caps, rings, copper washers, hose, hose clamps. It seems like extremely cheap insurance for headache relief down the road
Elder User
Joined: Sep 2013
Posts: 594
Likes: 3
From: West Des Moines, IA
Isn't that just two bolts on the passenger side of the pump? I haven't looked at a pump in a while... I'll have to go dig my spare out of storage to see if it's any different.
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Senior User
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the 6.9 pump has a locking ring u can take off but the 7.3 pump throttle is fixed u cant remove anything to install the kick down lever
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