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Cummins 555

Posted By Jeff Wright Last Year
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xcummins
Posted 7 Months Ago
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Geoff..........I plead partial insanity and a major seniors moment.....
of course the cylinder spacing didn't change!!!!!.....1 too many brews that night........the heads are interchangeable even tho the head bolt sizes are different.....504 to 555 you need to open up the head bolt hole....555 to 504 doesn't matter.

I've been outback mustering so I'm back now and I will find the reason why the 555 is longer and report back.....lol.

Newto
Brocky
Posted 7 Months Ago
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Although I gave them to the man who bought by Brockway, The Shop manual and parts book I bought from Cummins covered all three engines (376, 504, 555) at once so I believe they were basically the same???

Brocky
Geoff Weeks
Posted 7 Months Ago
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xcummins (5/17/2021)
lol Geoff,


I will check that tho....just in case I'm having a seniors moment.

cheers,

newto

I have a fair number of those myself! 
 I can't see the same heads if the cyl bore spacing has changed. I can easily see needing more counterweight and a longer crankshaft,  Never had anything to do with the Cummins V8's, so nothing to disagree with what you have said  

xcummins
Posted 7 Months Ago
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lol Geoff,

from memory they thickened up the crank counterweights a smidge which made the crank longer and changed the cylinder centrelines.....they run the same bearing sets.

I will check that tho....just in case I'm having a seniors moment.

cheers,

newto
Geoff Weeks
Posted 7 Months Ago
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Newto
Huh, why is the block 4" longer? everything else makes sense. Couldn't move the bore spacing if the heads interchange, or did I mis read that?   I'm a "six in row, to make it go" kind of guy. 
xcummins
Posted 7 Months Ago
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I'm pretty late supplying this info but maybe it will help someone.

Although the V555 & V504 are both the same bore size (4 5/8") because the V555 has a longer stroke the block is taller from crank centre to head face to accommodate the longer stroke. This makes the V555 2 inches wider than the V504....doesnt sound much but in some chassis 1" extra width each side when sitting in the chassis rails makes it a bitch to get exhaust manifolds or heads off.

The V555 is also 4" longer than the V504 so rear engine mount locations change.

Basically the 2 blocks, cranks, rods & pistons are totally different......the heads & some hang on stuff are interchangeable but the most important bits aren't.

hope that helps someone,

Newto 
Jeff Wright
Posted 8 Months Ago
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Thank y'all for the much needed info. I've got a 66' Ford T800 I'm restoring and would like to put the original V8 diesel engine back in it. 

Jeff W. 
Brocky
Posted Last Year
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I was told the only difference between the 504 and 555 was the 1/2 inch stroke and that most parts were interchangeable.. My 71 Brockway had the 504 and I had bought 2 555's from a man up in NY state.. Was going to build one engine from the 3, but I sold the whole truck and all the parts i had accumulated to a  Brockway man up in NC.. Have not heard what he has done with them..

Brocky
Jeff Lakaszcyck
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Hamish (11/29/2020)
Bruce Ohnstad (11/29/2020)
Were the two engines a similar design but just different strokes?

What was the specs on the V6 from the early 1960s?  The Ford 950 had it rated at 160 net HP.

Bruce

Bruce, the small Cummins V6 and V8 engines were built from the mid-60s at a Cummins plant in Darlington, England. There were V6130/V6140 and V8170/V8185 with 4 5/8" bore x 3 1/2" stroke-the V6 was 352 c.i.d. and the V8 was 470 c.i.d. There was a V6 version of the V504 V8 too-V378, I think.
The Cummins V6 in the Ford N950 would have been a V6200, I guess which was a totally different engine to the small V6s, I think. The V6200 was 588 c.i.d.-5 1/2" bore x 4 1/8" stroke-V8 version was 785 c.i.d.-V8265. I think Jeff has a military version of the V8 rated at around 300 h.p. in his military Mack.


You are right Hamish, my Mack M123A1C has a 785 ci Cummins V8-300 with 300 hp. 



Jeff
Hamish
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Bruce Ohnstad (11/29/2020)
Were the two engines a similar design but just different strokes?

What was the specs on the V6 from the early 1960s?  The Ford 950 had it rated at 160 net HP.

Bruce

Bruce, the small Cummins V6 and V8 engines were built from the mid-60s at a Cummins plant in Darlington, England. There were V6130/V6140 and V8170/V8185 with 4 5/8" bore x 3 1/2" stroke-the V6 was 352 c.i.d. and the V8 was 470 c.i.d. There was a V6 version of the V504 V8 too-V378, I think.
The Cummins V6 in the Ford N950 would have been a V6200, I guess which was a totally different engine to the small V6s, I think. The V6200 was 588 c.i.d.-5 1/2" bore x 4 1/8" stroke-V8 version was 785 c.i.d.-V8265. I think Jeff has a military version of the V8 rated at around 300 h.p. in his military Mack.
 


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