Can anyone identify this Mack Diesel engine

[screwylouie010]

Stumbled upon this old Mack diesel with a roosamaster injection pump today. Forgot to look for a data tag. I’ve never seen/ heard of a Mack diesel this small or with a roosamaster injection pump. I would say it’s around 300 cubic inch. Naturally aspirated. Anyone know what it is? 

[Joey Mack]

That's really cool.  I wonder if it's an E-5 ?  

[screwylouie010]

E-5? Never heard of 1 before. But the more I look at it, the more it reminds me of an ih d361. I actually thought that’s what it was before I saw it said Mack diesel on the exhaust manifold. But wouldn’t e5 indicate that it would be in the 500 cubic inch area? It’s way to small for that 

[Joey Mack]

I'm not sure..  I look forward to learning.  I bet Geoff Weeks knows.  He is a wealth of knowledge. 

[doubleclutchinweasel]

That must be before my time.  Maybe the late '30s-40s?  I'll definitely be curious to find out what it is.

[screwylouie010]

6 minutes ago, doubleclutchinweasel said:

That must be before my time.  Maybe the late '30s-40s?  I'll definitely be curious to find out what it is.

I don’t believe roosamaster pumps were in production until the mid 50s

[doubleclutchinweasel]

1 hour ago, screwylouie010 said:

I don’t believe roosamaster pumps were in production until the mid 50s

Well, that DEFINITELY makes it interesting!

Can't wait to see what this thing is!

Earth to Geoff!  Come in Geoff!

[67RModel]

I'm pretty sure that is a Buda engine. You could get various versions of a Buda diesel in a Mack starting in the mid 1930s. I think they were anywhere from 212CID to 468CID. They used the Lanova style combustion chamber. Basically anything before the END519, which was Mack's first proprietary diesel, was a Buda engine. I think Allis Chalmers bought Buda in the 1950s

[doubleclutchinweasel]

Well, looks like Roosa had their first contract to produce pumps in 1952.  So, still may be the earlier Mack diesel, before the ones I am more familiar with.

[doubleclutchinweasel]

1 minute ago, 67RModel said:

I'm pretty sure that is a Buda engine. You could get various versions of a Buda diesel in a Mack starting in the mid 1930s. I think they were anywhere from 212CID to 468CID. They used the Lanova style combustion chamber. Basically anything before the END519, which was Mack's first proprietary diesel, was a Buda engine. I think Allis Chalmers bought Buda in the 1950s

That is more like where my mind was going, 67.  Thanks for the details!

[doubleclutchinweasel]

Here is another discussion about older stuff...

 

 

[Vladislav]

That's not Lanova. Lanova's distingueshing feature is injectors located at the side of the head. The reason was pre-chambers were fitted right opposite for the fuel injected stream to go straight into the pre-chamber's incoming channel. So you could see side mounted injectors at one side of a head and pre-chamber locking brackets at the other. Telling this I conclude that engine above is a kind of Thermodyne and later than early 50's. And that's not Buda since those early Buda's were Buda-Lanova's.

Damn interesting unit shown in the pics indeed. Single head, artificial exhaust manifold... Would be cool to figure out the truth on its model and design features. 

 

[doubleclutchinweasel]

Good point on the Lanova heads.

I will try to dig through some Mack info tonight and see if I can find anything that might at least narrow down the possibilities.

I still bet Geoff knows!

[67RModel]

Whatever it is I like how the engineers knew it would have to be worked on at some point and took the care to design the exhaust manifold such that the injection pump is easy to access. Any pictures of the other side?

[doubleclutchinweasel]

Kinda' off the wall, but could that be a mid-'50s Scania?

Don't shoot me if I'm way off there!

[mrsmackpaul]

Scania motors that I know of have separate heads for each cylinder 

Apart from that I have no idea 

 

Paul

[screwylouie010]

I know the guy that has it. He’s supposed to send me more pics and look for data tag. He told me I can have it, if I want it. Didn’t have anything there to load it in my truck at the time 

[doubleclutchinweasel]

You sure have our curiosity piqued!!!!!!

 

[screwylouie010]

The data tag is missing, but it used to be under the exhaust manifold 

Edited September 25, 2023 by screwylouie010

[fjdrill]

That is a White/Hercules D298. 70-80 HP. Dad had one on a Generator.

[doubleclutchinweasel]

When did Mack use those, or in what trucks?

[mechohaulic]

7 hours ago, 67RModel said:

I'm pretty sure that is a Buda engine. You could get various versions of a Buda diesel in a Mack starting in the mid 1930s. I think they were anywhere from 212CID to 468CID. They used the Lanova style combustion chamber. Basically anything before the END519, which was Mack's first proprietary diesel, was a Buda engine. I think Allis Chalmers bought Buda in the 1950s

Buda its not . the buda was an option back early '40's ; the 468 cu in  model 6DT was offered in the conventional  cab FP as an option. the blue paint is a give away. 

[mechohaulic]

14 minutes ago, doubleclutchinweasel said:

When did Mack use those, or in what trucks?

remember the steel fuel return lines and solid top caps  . before the days of top mounted return lines; can't remember what vehicle  engine was in during disassembly. 

[screwylouie010]

Thank you. Mystery is solved. Kinda disappointed it’s not a real Mack. Think I may still grab it and see if it’s any good

[Joey Mack]

Heck yeah.. grab it... so who made the engine ?  I may have missed the answer...