Radiator is new. Now that's it's not 90°, it seems to be running cooler. More down around 220-225 loaded. 210 when mt.
So, I finally got figured out why the oil temps were running so high. It was a programming issue. I had the ecm reprogrammed and truck is running much better now. I did lose some power, but I'm working on getting that fixed.
you might check and see what your accual oil temp is, mine is a different family of mack engine e-7 but oil temps always ran high on it, stayed under 250 but just, running synthetic oil was higher than i would like to see but synthetic should hold up to that temp. so i ran it, then after a while i noticed the oil temps reading 110-120 on the gauge turning the key on after the truck had been off 24 hours or so and ambient temps 60 or so. warmed the truck up and checked the temps at the oil filter/pan with a lazer thermo and found the oil temp reading was off by 60 degrees or so.
Well, for the 2nd time in 7-8 months truck is going back to Mack for injectors. It's losing prime overnight and it's hard to stay in the morning. I have a bad stutter at highway speeds and no power. At least it's under warranty this time. I wish someone sold aftermarket injectors for these motors, Volvo has a really bad reputation for bad injectors.
This is why I can't afford to install cups/injectors on these engines at my shop anymore. Takes me 8-10 weeks to get money back from Volvo for failed parts (if they give it back) They treat you like "this type of parts failure does not happen often, you need to review your repair procedures"
Does not happen often? Bwahahahaha I'm sitting at Mack and the service manager got a good laugh at that one.
When I posted that last year, things got bad really fast. The injectors did go bad, but even worse the head went bad. 2 injectors were seeded so bad the mechanic couldn't get the feeler gauge in. So since it had 900,000 miles and the rods & mains were due, I ended to doing a full overhaul. Took 6-7 weeks. Got it back just after July 4th. Ran really good till Oct, then I started having a miss. I think I had an injector going bad, but since Mack already did an injector set under warranty during the inframe, they wouldn't warranty it again. I had had enough and I sold the truck and bought a used glider with a 12.7 Detroit. While I miss the Mack and loved that truck, best decision I made was buying the glider. I just didn't trust the Mack anymore.
