IH 446 V8 engine:
Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Shops, Barns, Varmints, and Trucks
Forum Description: anything you want to talk about except politics
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=207213
Printed Date: 30 Jun 2025 at 4:20pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: IH 446 V8 engine:
Posted By: Codger
Subject: IH 446 V8 engine:
Date Posted: 23 Jun 2025 at 9:45pm
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I have one of these that runs very well and isn't an oil burner but the truck has rusted to pieces around it. The hood is usable with some repairs too. Truck is a 1979 S-1924 I believe. I really have no use for the engine myself so going to offer it up here first. I was told it was rebuilt in the mid 1980's but have no supporting paperwork, or anything offering proof. It is still in the chassis and can be run for demonstration should anyone have interest. It will directly replace an IH 404 engine. Truck has a 5 speed transmission installed with PTO and it seems to shift well. Hydrovac problems put the truck down and after setting several years in a barnyard, it has rusted to pieces. No floorboards left to the cab as example. Gas tank(s) are both rusted through so gas leaks away but it will hold a couple gallons to drive around my property. I'm going to cut the truck apart under the cab, mount risers and a 5th wheel plate making a small dump trailer from the Scott steel grain bed installed onto the existing chassis. Has a good heavy hoist and works well. This project is moving to the front so about a week is all I'll allow the truck to remain together. Gas Ax is ready and waiting to make it usable for me. Thanks,
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Replies:
Posted By: Codger
Date Posted: 29 Jun 2025 at 6:43am
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I have another engine in the shop needing to find a good home. This one is a 2000 model year 7.3ltr diesel in an F-250 4X4 Ford truck that has rotted around the driveline. Frame and body are long gone but the engine and trans run/function perfect. it is an automatic transmission. This was driven routinely till the oil pan started leaking from rusting out and the truck was removed from service. It has always been a snow plow truck. I have a brand new "Dorman" oil pan to install and steel core silicone pan gasket set that will be installed before it leaves. Trouble is with this truck design is to change the oil pan the engine either needs removed from the chassis, or the front frame support needs cut out and rewelded into place afterward. The truck simply is not worth the labor to perform either. It will start and run/drive with oil dumped in, but will leak out completely in just a couple of days. I want to demonstrate the engine prior to sale, but it will go with the new parts either installed if someone purchases the engine, or supplied with the truck if purchased whole. It does run well and carries good oil pressure. Always has had good maintenance but being a plow truck, salt, etc. has really eaten it up. I'm not a salesman and certainly not in the business of screwing anybody over. I have driven this truck and openly state it is a good parts donor that runs well and looks like an unpolished t**d. I have no use for the engine as have several other medium and heavy trucks around here so starting to clean up a bit. Reach out if interested. ------------- That's All Folks! |
Posted By: DMiller
Date Posted: 29 Jun 2025 at 8:35am
| Would be a MV 446 not 464. MV 404/446/378 series blocks. |
Posted By: Codger
Date Posted: 29 Jun 2025 at 12:54pm
You are correct Dave; Going from fading memory of six months past when I rubbed the block for the stamping number. It is a 446 engine; original was a 404 to the chassis which the decals on the rocker cover denote. Thanks for clarification. Going to chop the truck this next week and start the conversion mentioned. ------------- That's All Folks! |
DMiller wrote:Posted By: DMiller
Date Posted: 30 Jun 2025 at 2:50am
| For same reasons the MV series was near to indestructible so too it's diesel counterpart the IH v8 automotive diesels. 6.9 and 7.3(421 and 445cu inches), High Nickel Content engine blocks. Rebuilt many gassers back in my early years as to STD Pistons and rings, negligible if any ring lip in cylinder walls, next to no wear beyond polishing in cylinders, even on a Sand Pit dump truck old V Series with a 446. Sunnen Hone .001-.003 cut, new rings and pistons, BACK to OEM specs. |
Posted By: Codger
Date Posted: 30 Jun 2025 at 5:48am
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Used to be a very common engine series in the city trucks of Springfield, IL back in the 70's to the early 80's. Usually single axle dumpers with a snowplow on the front. Allison AT-545, or MT-643 automatic transmissions. I had one of the 9.0ltr V8 engines in rollback service for a couple of years and it was a great engine for me. 17mpg empty with a 21' steel rollback bed. With an average car on the deck and another on the stinger, about 12mpg running steady 60mph. Really liked that truck but the old "S" series sure liked to rust. If nobody can use this engine I may repower one of my portable air compressors with it. My old B-427 Continental is extinct for parts, is tired, but still running well. Still doesn't use, or leak oil, but piston slap is prevelant in the engine.
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