91 7.3 Coolant Change

[tdodd1125]

New to the forums here and learning a lot, but got a 1991 F350 XLT Dually a few months back. Just recently got started on making the truck daily driver capable. Noticed that the PO had disconnected the heater core, so I decided to replace. Pulled the old core out no problems (It was horrible looking, so my suspicions were correct on that). My troubles however, started when I decided to change the coolant out, because of the new component. I was able to drain the radiator successfully with no problems. As for the block, I decided to start with the drivers side, because the passenger side looks a bit more difficult to take out. I took what I believe to be the drain plug out (brass plug with square end on the right hand side when facing the oil cooler). No coolant came out. I'm confused a bit, and the plugs on my truck look different from the pictures on the other threads about this topic. Any advice would be greatly appreciated. This thing has been nothing but a head ache for me recently.

 

[79jasper]

Sounds like you maybe pulled the oil gallery plug.

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[tdodd1125]

Actually, you're half right on that my friend. I started with the plug on the opposite side of the oil gallery plug. That was a dead end. Then I pulled the oil gallery plug and realized what it was. So still lost.

 

[79jasper]

Try poking something up the hole. Could have junk over it.

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[FORDF250HDXLT]

This thing has been nothing but a head ache for me recently.

welcome to OBN and the joys of old idi trucks.don't worry,it'll get worse before it gets better.

 

[tdodd1125]

I'm going to try the old poke method tomorrow. Thanks for the welcome! I consider myself an "above average shade tree mechanic" haha. Let me tell you though, this diesel thing has definitely been a learning process. Heater core couldn't have been easier to remove though, way better than my 83 Continental.

 

[madpogue]

Not that it's relevant here, but since your truck is not a Powerstroke, you might want to post in the IDI forum. (The block plugs happen to be in pretty-much the same locations on the PSD and IDI blocks.)