Anthony All Site Posted June 5, 2019 Share Posted June 5, 2019 Not my truck yet, but really thinking of buying a 2006 granite tandem dump with a 427 and allison. After running the truck for a 15 minute test drive, I checked the oil fill and blow by tube and definitely pushing some what I think is steam or white smoke. Truck has 270,000 miles showing. Which I thought was low mileage. I am thinking buy it and overhaul right away, or run it till it gets worse and hopefully have the truck make me some money before it ends up in the shop. Of course I could just run and not buy it. Leave the problem with the current owner. I took a video of the blow by after the test drive: Granite blow by video clip Quote Link to comment https://www.bigmacktrucks.com/topic/57510-overhaul-needed-on-ai-427-270000-miles/ Share on other sites More sharing options...
fjh Posted June 5, 2019 Share Posted June 5, 2019 i WOULD BE VERY CAREFUL TO OFFER LOW with that rebuild in mind! Quote Link to comment https://www.bigmacktrucks.com/topic/57510-overhaul-needed-on-ai-427-270000-miles/#findComment-424522 Share on other sites More sharing options...
Mack Technician Posted June 9, 2019 Share Posted June 9, 2019 (edited) There are guys on here picking up government surplus AI Mack engines (new) for dirt. I just found 2 on a surplus auction for June 17 starting at $5 (no idea what the reserve is?). If I had an engine sourced i’d low ball him. When your looking for a gray engine Mack, to buy, carry dip strips in your pocket and check the coolant SCA. If it’s low on cavitation protection consider the engine a liability for sleeve coolant leakage and counterbore cavitation pit damage. Not a Mack fault, folks just need to maintain SCA Nitrite protection and there is no risk to the block. Higher the HP the higher the cavitation risk. Edited June 9, 2019 by Mack Technician Quote Link to comment https://www.bigmacktrucks.com/topic/57510-overhaul-needed-on-ai-427-270000-miles/#findComment-424882 Share on other sites More sharing options...
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