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Antique Autos and Trucks All about finding and fixing old car or truck engines and vintage vehicles.

Antique Autos and Trucks

Mack Bulldog


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  #11  
Old 11-17-2017, 07:12:40 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: Mack Bulldog

With those solid tires, I bet the ride won't do your heart much good either! Rough rider indeed All kidding aside, looks like you have a nice project on your hands. is the engine stuck or free?
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Old 11-17-2017, 07:46:02 PM
uglyblue66 uglyblue66 is offline
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Default Re: Mack Bulldog

Wow that is cool! I wish could tackle a job that big but I can't.
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  #13  
Old 11-17-2017, 07:58:02 PM
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FWurth FWurth is offline
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Default Re: Mack Bulldog

Look's pretty good to me. A good cleaning will do wonders as it looks very solid.
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Old 11-17-2017, 09:14:40 PM
Jack Innes Jack Innes is offline
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Default Re: Mack Bulldog

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Originally Posted by Andrew Mackey View Post
With those solid tires, I bet the ride won't do your heart much good either! Rough rider indeed All kidding aside, looks like you have a nice project on your hands. is the engine stuck or free?
They do ride rough even though the top speed is 18 mph. MACK did have better suspension than others of the period though. They figured it out that thinner spring leaves & more of them worked better.

The engine is stuck from sitting idle for over 40 years. I am told it did turn when parked inside in the 70s.

I am soaking it with ATF/Acetone 50/50 & heating the crankcase from inside with a heat gun off & on. I have had good luck with other stuck engines with that method.

Jack
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Old 11-18-2017, 07:11:07 AM
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J Kocak J Kocak is offline
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Default Re: Mack Bulldog

Is this the type of side plate your looking for?
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Old 11-18-2017, 09:06:10 AM
Jack Innes Jack Innes is offline
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Default Re: Mack Bulldog

Yes that is the plate that would be mounted on the outside of the cab on both sides. The plate pictured is for an earlier model but would do.

In 1922 the name was changed from "International Motor Co." to "Mack Truck Inc." to avoid confusion with International Harvester trucks.

Jack
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Old 11-18-2017, 11:47:44 AM
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Default Re: Mack Bulldog

A fellow collector near here picked up a complete spare motor of one of these from an old sawmiller close out. It wasn't stuck but was mounted on a wood skid for use as a power unit in the mill years back. There was something about those motors, who was actually the builder. I don't recall the details, but I think the motor was built by an outside vendor on those trucks?
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Old 11-18-2017, 02:33:23 PM
Jack Innes Jack Innes is offline
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Default Re: Mack Bulldog

Mack built their own engines & most other parts. They have always built their engines but in later years they offered other makers' engines as an option. The term "Built like a MACK truck" is founded on the heavy duty service of every part.

GOOD NEWS; The engine now turns over with compression even!!! A couple of 2 hour heat cycles with a 1500 watt heat gun through one of the crank case ports & a soaking of ATF/Acetone mixture worked in less than 24 hours.

Jack
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Old 11-18-2017, 02:57:05 PM
Andrew Mackey Andrew Mackey is offline
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Thumbs up Re: Mack Bulldog

Clean out the oil pan, some fresh non-detergent oil, spark and gas, and off you go! You might want to check the engine bearings before start up, to avoid any surprises later! Hope the rest of the resto goes as fast as the engine!
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Old 11-18-2017, 03:38:15 PM
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Default Re: Mack Bulldog

There was something about the cast in logo on the engine block. It didn't stand for Mack. Maybe it was the foundry logo, I know there was an article about that on the truck forum a few years back and there was another company involved. Was it maybe the International truck co you mentioned above? Just trying to dig up more info. But I thought they claimed that the motor was from another early engine builder. I guess I need to see if there's anything on the website about Mack trucks. And yes I too thought that they had always supplied their own motors back in the day. Possibly the supplier I heard of ended up as a part of the main company.
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