cfd511 Posted January 22 Share Posted January 22 (edited) Hello all I'm in the market and currently looking at a 2008 mack granite with a mp8 engine in it . I went to look at it this past Sunday and it was about 20 degrees. The truck hadn't been started in a few months but took a lot of effort to start it. Once it was running it sounded good and ran fine. I let the truck get up to operating temp and pulled the oil fill cap and sip stick to look for blow by. Absolutely nothing which is good. I was Always taught to check the radiator expansion tank for pressure. The truck was at operating temp and there was pressure behind the cap and some squirted out. I also noticed the overflow side also had coolant in it. Is this normal . I assume there should be some pressure at operating temp but im unsure . I do also recall a bubble here and there in the expansion tank. The coolant was also right at the cap for the expansion tank. Once again no blow by or any smoke that I could see. The truck as also deleted and computer tuned. truck has 230,000 miles on it. Edited January 22 by cfd511 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 23 Share Posted January 23 Well, if you want to make a million dollars with that truck.... Start with 2 million... Run away, run far away.... 1 Quote Link to comment Share on other sites More sharing options...
JoeH Posted January 25 Share Posted January 25 Generally Mack's and "deleted" is nothing but problems, but I have no experience in the matter. Just what I've heard. Personally I cringe at the thought of buying an MP engine, but the reality is it's gonna have to happen someday. Injector cups are a regular maintenance item or so I figure from a lot of talk about them in the past. Timing gears are all on the backside of the engine I think, which sounds weird to me. Not sure how others feel about that. Quote Link to comment Share on other sites More sharing options...
JoeH Posted January 25 Share Posted January 25 "Deleted" you'll be on your own to fix, dealer probably won't want anything to do with it, so be prepared to work on it yourself. 2 Quote Link to comment Share on other sites More sharing options...
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