CDR question - 1988 International S1600 7.3 idi (dump body)

Saxonw12

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I bought an old girl, she runs pretty well, but when under load (25,500 lbs) going up and down hills at about 40-50 MPH (speedo doesn’t work) she dumps a lot of blue smoke. I’m wondering of the CDR valve is to blame. When idling or driving lower speeds little to no smoke. The CDR is located in a different spot on my truck than my 1994 F350. Is the CDR different with the IH than the F350? Or just in a different location.

I did a quick search and didn’t find this info, but if I missed something please point me in the right direction.!
 

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Booyah45828

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Your cdr is right in the center-left of your picture. It's painted orange and is between the air cleaner inlet and the firewall.
The hose from the valve cover goes to the top, and the bottom goes right behind the intake.

It could be junk, or your engine could be wore out. Easier to replace the cdr and try again then to replace the engine.
 

Saxonw12

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Sounds good, any good way to troubleshoot?
Your cdr is right in the center-left of your picture. It's painted orange and is between the air cleaner inlet and the firewall.
The hose from the valve cover goes to the top, and the bottom goes right behind the intake.

It could be junk, or your engine could be wore out. Easier to replace the cdr and try again then to replace the engine.
Sounds good, is there a typical way to troubleshoot vs throw parts at it?
 

Nero

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Take the cdr off, there's a small pinhole in the back side of it (in your picture it will be facing upwards) that hole can get plugged, causing the diaphragm to not work correctly. Normally the CDR is open and free flowing, but closes under a vacuum. You could take some shop air and a little rubber tip and blow into the little pinhole to check the diaphragm. Mind you only do like 3psi max! Doesn't take much to compress the internal spring. If the diaphragm isn't torn, just clean it up and put it back on.
 

hacked89

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Internationals used a front sump oil pan.
That’s what I thought but haven’t been able to find it online yet to purchase and knowing this model truck does would help. Need front sump pan for an IDI swap into a car I’m starting as the truck wraps up by end of this year.
 

Cubey

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That’s what I thought but haven’t been able to find it online yet to purchase and knowing this model truck does would help. Need front sump pan for an IDI swap into a car I’m starting as the truck wraps up by end of this year.

I looked up 1988 International 1654 with 7.3 on RockAuto and under oil pan it shows one (sold out): ATP 103102

I went on ebay and found one for $150 with free shipping:
 

IDIBRONCO

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That's sure enough an International oil pan. In order to use this oil pan (or any international pan) on your Ford engine, you'll also have to use the front spot for the oil dipstick tube. I don't remember about the dipsticks/tubes. You may or may not be able to use the Ford ones. I am pretty sure that the Internationals didn't use the dipstick tube bracket that goes over the top of the valve cover like the 7.3s and the later 6.9s had.
 

Booyah45828

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Off topic, but is the oil pan on that engine front or rear sump?
One of mine is front, the other is rear. Not real sure if I'd call it a sump, though, It might be 2 inches or so difference between front and rear for the sump part. Definitely isn't as pronounced as the truck pans' sump that's for sure. Not sure if that helps you, or if it would be different enough to fit in a car.
 

IDIBRONCO

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Definitely isn't as pronounced as the truck pans' sump that's for sure.
I think that the drop looks smaller than the drop on the truck pan because the rest of the pan is deeper than the truck pan. Just by going off of the looks, the International pan may hold more oil, but I may be wrong. It would be nice if someone with an International could confirm or deny this.
 

Saxonw12

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Take the cdr off, there's a small pinhole in the back side of it (in your picture it will be facing upwards) that hole can get plugged, causing the diaphragm to not work correctly. Normally the CDR is open and free flowing, but closes under a vacuum. You could take some shop air and a little rubber tip and blow into the little pinhole to check the diaphragm. Mind you only do like 3psi max! Doesn't take much to compress the internal spring. If the diaphragm isn't torn, just clean it up and put it back on.
Thanks!
 

Booyah45828

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I think that the drop looks smaller than the drop on the truck pan because the rest of the pan is deeper than the truck pan. Just by going off of the looks, the International pan may hold more oil, but I may be wrong. It would be nice if someone with an International could confirm or deny this.
That's correct. The drop is smaller because it's deeper where the sump isn't by a couple inches. The fords had to clear the crossmember so the pan hugged the block more. I can take all the measurements one would want from either front or rear pan. They look slightly different, but that's just me with a quick glance.

Barring the oil pickup location, would one be able to flip the pan front or rear? IDK if the bolt holes are symetric or if the front and rear main cover humps are the same size/shape.

IDK the oil capacity of the IH engines, if they differ or not from the ford ones. The bus's dipstick was aftermarket that was marked with an electric scribe by someone before me. First oil change I filled it with 11 quarts w/ fl1995 filter and remarked it with a cold chisel which put it at the center of the prior mark. BTW, both engines have the dipstick in different location. I had posted this at one time(here or on FB), but can't find it.
 
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