seyser Posted February 3, 2017 Share Posted February 3, 2017 Is this an 864? Its in a 1974 R700. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/48609-what-model-v8-is-this/ Share on other sites More sharing options...
mackaholic Posted February 3, 2017 Share Posted February 3, 2017 865 or 866. Likely the later if the engine is original to the truck. If the data plate is still on the valve cover that would supply all the details. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/48609-what-model-v8-is-this/#findComment-360655 Share on other sites More sharing options...
seyser Posted February 4, 2017 Author Share Posted February 4, 2017 Ok looks to be a ENDT865 according to the build sheet. Can anyone tell me about these engines? Are they any good, What sort of problems should I look for? Quote Link to comment https://www.bigmacktrucks.com/topic/48609-what-model-v8-is-this/#findComment-360676 Share on other sites More sharing options...
steve p Posted February 4, 2017 Share Posted February 4, 2017 look at the engine no on the oil pan rail it will indicate what it is. oil pressure relief springs had a bad habit of breaking ,loosing oil pressure. head gaskets weep a bit. keep fresh good quality oil up to it with lucas or moreys as a supplement .as a hobby truck they are fine but i would never work one now 1 Quote Link to comment https://www.bigmacktrucks.com/topic/48609-what-model-v8-is-this/#findComment-360680 Share on other sites More sharing options...
AZB755V8 Posted February 4, 2017 Share Posted February 4, 2017 18 hours ago, seyser said: Ok looks to be a ENDT865 according to the build sheet. Can anyone tell me about these engines? Are they any good, What sort of problems should I look for? It is more than likely a 865/325hp. The gold color is Maxidyne pump settings. Go to the upper right corner of this page and Search 865 There are pages of information on these engines here at BMT. I have a few of them as hobby engines now and would not be working one regularly. It is the predecessor of the E9. There are few shops that know what they are these days and fewer that can work on them. Parts are hard to get and $$$. Keep it running and have fun IMHO. Quote Link to comment https://www.bigmacktrucks.com/topic/48609-what-model-v8-is-this/#findComment-360739 Share on other sites More sharing options...
steve p Posted February 5, 2017 Share Posted February 5, 2017 i wouldn't go by the colour ,i have a 375 hp 866 numbers matching engine but there is maxidyne gold under the silver ,check the pump no ,would be a good place to start and engine no Quote Link to comment https://www.bigmacktrucks.com/topic/48609-what-model-v8-is-this/#findComment-360848 Share on other sites More sharing options...
Lmackattack Posted February 6, 2017 Share Posted February 6, 2017 The early v8 maxidynes were hit or miss for not making it very for before needing bottom end bearings. I know of 3 of them that all needed bearings around 100-150k 2 of them were sister trucks and both needed them. Quote Link to comment https://www.bigmacktrucks.com/topic/48609-what-model-v8-is-this/#findComment-360865 Share on other sites More sharing options...
Freightrain Posted February 6, 2017 Share Posted February 6, 2017 Wonder if the bearing issues was from how bad you lugged it around at low rpm? 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/48609-what-model-v8-is-this/#findComment-360929 Share on other sites More sharing options...
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