Smoothy Posted March 28, 2021 Share Posted March 28, 2021 After doing some reading on this site, I've realized that the 285 and 300+ are near identical to the untrained eye. What I'm asking is how do I know which one I've got? I have looked everywhere up around the timing cover to find a stamp saying ENDT676. I haven't found it and this engine is missing it's tag. I'm running this in front of a quadruplex, so I'm under the impression that the 300+ would be more appropriate for that transmission. Anyways, is there anything that would be obviously different between the two? I read somewhere on here about the 300+ having water lines running to the intercooler? I provided a picture just for reference. Quote Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/ Share on other sites More sharing options...
mrsmackpaul Posted March 29, 2021 Share Posted March 29, 2021 Only the later series cooled coolpowers had the water lines to the intercooler I think these were then 350 hp There must be different casting numbers on the block as I'm pretty sure the Maxidyne has more webbing around the bottom end The first Maxidynes sold in Australia were prone to cracking the block around the lower end So to answer your questions, I dunno lol Paul Quote Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/#findComment-471676 Share on other sites More sharing options...
63BMack Posted March 29, 2021 Share Posted March 29, 2021 If it came out of a cabover the numbers should be on the back of the engine. Quote Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/#findComment-471685 Share on other sites More sharing options...
terry Posted March 29, 2021 Share Posted March 29, 2021 1 hour ago, 63BMack said: If it came out of a cabover the numbers should be on the back of the engine. Right below head gasket on back of block. terry Quote Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/#findComment-471687 Share on other sites More sharing options...
Smoothy Posted March 29, 2021 Author Share Posted March 29, 2021 I'll try and look there for one today. Quote Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/#findComment-471691 Share on other sites More sharing options...
Smoothy Posted March 30, 2021 Author Share Posted March 30, 2021 Must be out of a cabover. It's certainly not on the flat spot of the timing cover, and good luck looking at the back of the block in a B! I can barely squeeze my hand back there, let alone my head. Quote Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/#findComment-471718 Share on other sites More sharing options...
63BMack Posted March 31, 2021 Share Posted March 31, 2021 Can you use a small mirror or a scope to try to see back there. I know there's not much room Quote Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/#findComment-471771 Share on other sites More sharing options...
Rob Posted March 31, 2021 Share Posted March 31, 2021 Though it won't help if modified post up the number, or photo the tag from the injection pump to decode the pump's original application. Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/#findComment-471774 Share on other sites More sharing options...
Smoothy Posted March 31, 2021 Author Share Posted March 31, 2021 There's my answer, but it wouldn't hurt for us to continue to discuss any other differences for others who may come across this. Were the Maxidyne blocks the same as the Thermodyne? Also, here is a link to the page where I found the info on the pumps. https://www.yumpu.com/en/document/read/6985772/remanufactured-diesel-products-ambac-number-to-customer-number 1 Quote Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/#findComment-471784 Share on other sites More sharing options...
theakerstwo Posted March 31, 2021 Share Posted March 31, 2021 The word Thermodyne can cover many different model engines so yes and no as for as being same block. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/#findComment-471793 Share on other sites More sharing options...
mrsmackpaul Posted March 31, 2021 Share Posted March 31, 2021 4 hours ago, Smoothy said: There's my answer, but it wouldn't hurt for us to continue to discuss any other differences for others who may come across this. Were the Maxidyne blocks the same as the Thermodyne? Also, here is a link to the page where I found the info on the pumps. https://www.yumpu.com/en/document/read/6985772/remanufactured-diesel-products-ambac-number-to-customer-number So I must be blind, what answer did you come up with ? I'm struggling to read the injector pump tag Paul Quote Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/#findComment-471798 Share on other sites More sharing options...
Smoothy Posted March 31, 2021 Author Share Posted March 31, 2021 1 hour ago, mrsmackpaul said: So I must be blind, what answer did you come up with ? I'm struggling to read the injector pump tag Paul Paul, I came up with 5127A-P2 Quote Link to comment https://www.bigmacktrucks.com/topic/66394-endt676-285-vs-etaz673-300-how-do-you-tell-the-difference/#findComment-471807 Share on other sites More sharing options...
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