Can you find out engine from VIN?

[CattyMoons]

I’m looking at a 91 international bluebird
The seller isn’t sure of the engine or transmission
It runs and drives but we’re planning on being in the mountains so we don’t want to end up with a bus that can’t handle it. I’ve heard of people finding out more info using the VIN is that true? If so I’m looking in the wrong places, is there a website for this? Do I need to call Bluebird? Would they even tell me?

[cadillackid]

online VIN decoders will tell you the engine but not the transmission. for International, an IH dealer (if they are nice) can tell you the engine, transmission, rear gears, and tire size that the bus was factory built with with the last 8 digits of the VIN

[CHEESE_WAGON]

Dealer should be able to, but a 91 may be older than they can look up. Most Internationals will have a badge on the hood with the engine ID. DT360, DT466, T444, DT408, etc.

[CattyMoons]

Originally Posted by cadillackid

online VIN decoders will tell you the engine but not the transmission. for International, an IH dealer (if they are nice) can tell you the engine, transmission, rear gears, and tire size that the bus was factory built with with the last 8 digits of the VIN

Thank you I used the US Department of Transportation website to check the vin and it doesn’t say an engine type. But it also says “incomplete chassis” what would that mean?

[CattyMoons]

Originally Posted by CHEESE_WAGON

Dealer should be able to, but a 91 may be older than they can look up. Most Internationals will have a badge on the hood with the engine ID. DT360, DT466, T444, DT408, etc.

This one doesn’t unfortunately, I’ll try a dealer fingers crossed

[CHEESE_WAGON]

Incomplete chassis is normal. That just means the bus was an incomplete truck chassis supplied by International for Blue Bird, Ward, Thomas, etc. There may also be a decal on the engine somewhere identifying the engine as well.

[cadillackid]

My 91 is on IH computers , the hood badges didn’t seem to start till like 93 or 94 with the engine ID.

A heavy duty vin decoder on line will show engine.

[CattyMoons]

Originally Posted by cadillackid

My 91 is on IH computers , the hood badges didn’t seem to start till like 93 or 94 with the engine ID.

A heavy duty vin decoder on line will show engine.

Ok I typed in “heavy duty vin decider” and used Gates.com
It comes up as : “2021 International 3700 DT444”
But we know it’s a ‘91 so idk what to make of that?
I’ll try calling International tomorrow

[CHEESE_WAGON]

Decoders can be wrong. One recently decoded a bus delivered new in 1982 as a 2012. A pic of the engine can help members here in ID'ing it.

[CattyMoons]

Yeah that’s the second website I’ve had direct me to the 2021 with the DT444
The rest came up 1991 but didn’t have the engine at all unfortunately, I also messaged the seller to ask if he could look under the hood for a decal on the engine, so hopefully he or the dealer can help more tomorrow
Thanks for the help to you both!

[CattyMoons]

Ok I did a little more digging and found one vin decoder that was able to tell me it’s a 7.3L v8 engine - looks like it would have to be the International Harvester IDI (I have not heard of) based on the year it was produced
https://en.m.wikipedia.org/wiki/Inte..._Harvester_IDI

[CHEESE_WAGON]

7.3 IDI is the stuff of legends. T444 by another name. Very good engine. Now to verify the transmission. If it's over 26,000 GVWR, seats over 16, and / or has air brakes, a CDL will technically be required to drive it home. Just giving you a heads up.

[CattyMoons]

Yes!!! Woohoo! Just praying not the AT545 & that international will actually take my call lol, thank you I’m not confident in driving a bus anyway just yet but my dad has a cdl and will bring it home and teach me to drive it when we have it changed to a RV

[Brad_SwiftFur]

I picked up a similar bus for another member, a '91 IH 7.3 IDI non-turbo engine with AT545. Reliable runner, but limited in highway power and top speed. Topped out at 60 - downhill, maintained 55 on flats, dropped to 45 up gentle inclines. He drove it back to Michigan, no idea what he did with it after that.
A turbo version of this engine will have considerably more highway power.

[CattyMoons]

Originally Posted by Brad_SwiftFur

I picked up a similar bus for another member, a '91 IH 7.3 IDI non-turbo engine with AT545. Reliable runner, but limited in highway power and top speed. Topped out at 60 - downhill, maintained 55 on flats, dropped to 45 up gentle inclines. He drove it back to Michigan, no idea what he did with it after that.
A turbo version of this engine will have considerably more highway power.

Dang I’m hopeful it’s not the same one! I am terrified of the AT545 from all the posts on here people seem to have lots of issues with those. But it is in Michigan currently, although the seller wasn’t aware of the engine or transmission type & it sounds like the guy you sold it to would have know ... he said it’s a Texas bus but he bought it off his brother in law? I guess it’s possible

[CHEESE_WAGON]

Trans and rear gear ratio are both important, especially if you plan to drive it on the interstate. Typical skoolies have rear gears in the 4.88-5.29-6.13 range. Incapable of much over 50 mph with a diesel and a 4-speed without pushing the engine too hard.

[Booyah45828]

You can use this for bluebirds. I've used it several times to look up bus specs like engine serial numbers, transmission serial numbers, axle ratios, etc.

Unit Dashboard | Portal

Not sure how far back it goes, it doesn't have mine and it's a 1984 model.

[Booyah45828]

As said by others, the 7.3 idi is pretty reliable, I have a 6.9 in mine, which was the first series of the IDI engines made by international.

If you buy this, you better be handy, because most repairs are going to have to be performed by yourself, being that the engine is close to 30 years old. Most mechanics wouldn't have a clue about them.

There are turbo kits available. Hypermax makes one that is bolt on for the s-series internationals. Yours being a 3800, it will be very similar. Oilburners.net would have more info on this engine and turbokits.

This likely has an at545, and if so, it's not the end of the world. Mine has an at545 and shifts just fine. The IDI engines have a power band that is higher then most, which is beneficial to longevity of the at545. Just make sure the modulator cable by the gas pedal is adjusted correctly, most aren't which leads to an early death of any transmission.

[CattyMoons]

Thank you we were considering adding a turbo if price allows, but good to know about the transmission & modulator cable tip.

About the mechanics turning away from older models, do you think most of them would turn away from any bus pre-emissions? Or just one from 1991 rather than say 2001? I wouldn’t say we’re super handy but we can learn we’ve worked on & replaced car engines successfully a few times but I was planning on having any serious work we may need done by a professional to be safe.

[cadillackid]

alot of it is just experience.. if you find a shop with some old timers then they will easily work on older mechanical engines.. the newer younger guys learn the modern stuff and how to troubleshoot with computers and electronics vs troubleshooting a diesel at the mechanical level.. ie setting injector timing, and bleeding lines at the pump, etc..



the 7.3 IDI is a good runner but parts arent as common as they are for the 'powerstroke 7.3' which dominates about any search on the interwebds for "7.3 diesel"..



while theres likely still a few running around in service.. there are near as many as say the 2001 year range (which many trucks and busses from 01 are still on active service).. not as many from 93 and older..