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  1. Anybody have a fuse diagram for 96 RD690s with fully mechanical ?
  2. When this happens the exhaust is very blue so I assumed it was oil burning. If it is in fact fuel, what causes fuel slobbering?
  3. Ok guys will check for an air leak. Seems like this only happens when I’m hauling a load. When I get off the throttle and rpms drop below 1600 it quits making the noise. Regarding the oil leak from turbo no I do not idle excessively
  4. Would an air leak also cause the turbo to leak oil out the exhaust?
  5. 96 EM7-300 all mechanical. Periodically oil drips out exhaust side of turbo then stops. Had turbo off nothing leaking into compressor side, no slop in shaft. Get a terrible squealing noise when truck hits 1600 rpm when driving it. While parked and revving to 1600 cannot get engine to make this noise it’s only when driving. Any ideas?
  6. One truck is a 91 RD690s and the other a 96 RD690s but I will check those things
  7. Can carriers from a 38k suspension be swapped into 44k axle housings ? Is there any difference between the two carriers?
  8. I’m running the red coolant in my 96 RD and just changed the coolant filter with a Mack brand. Is this ok? I read where somebody said Mack filter is only to be used with green coolant. Should I change back to non Mack filter?
  9. 96 RD690 has no brake lights, turning signal on passenger side rear. Front signals work. No apparent broken wires. Fuses looked ok. Anybody have any ideas?
  10. I just went through this on a 96 em7-300 fully mechanical. Threw a bunch of parts at it including new lift pump and fuel lines etc. It ended up being the little jumper between the heads for the return fuel. One of the fittings was a little loose. Problem solved
  11. Still having an Issue with full mechanical E7 fuel prime bleeding down over night and causing long crank times. Have replaced fuel return line and also lift pump no luck. Truck idles nice but seems to have a slight miss operating. Somebody earlier mentioned a possible bad injector. Would one bad injector cause long crank times? Also somebody mentioned a possible bad check valve. Where is this valve located?
  12. I’m thinking it always happens when pulling a load up a hill and the fan kicks on ? I was reading about a possible bad belt tensioner also maybe?
  13. 96 E7 all mechanical. Going through the gears and when hitting roughly 1600 rpm the engine has obnoxious squealing noise. Its coming from the front of engine but I don’t think it’s the belts. What else could cause this noise?
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