|QUOTE (rader1 @ Saturday, Mar 9 2013, 06:14)|
| I haven't seen any issues with piston pin c-clips or broken/scored skirts with the tier 2s. All of our Tier 3 engines are less than 24 months old so i don't know how well they are going to hold up in the long term but so far we haven't seen any common issues.|
Honestly, the EVOs are very mechanically solid with just a few exceptions.
-The rubber o-rings used to seal the cylinder liner water jackets don't last very long. Which causes the engines to consume water and then run low on cooling water and overheat. Then the exhaust valve seats get hot and warp ruining the head.
-The tier 3 turbos use a nozzle ring that is held in place by steel pins and those pins are starting to break so we're replacing quite a few turbos recently.
-The earliest EVOs we have are starting to break cranks. We've seen about half a dozen broken cranks over the last year or so. Unfortunately we're not setup to pull cranks on EVOs yet, so they have to go to GE. That's all going to change in the next 6 months or so, though
Known what u mean about the liner seals. We had to replace the lot at 1/3 engine life. New ones seem to be good. Water pump reliability on both dash9 and evos are a real problem. You have the same problem? Get many dash 9 piston skirt failures? We have to inspect every 4 months. Saw a fair few exhaust tappets come loose on Evo,s but no inlets.