Injectors came in last nite! BTW Happy Thanksgiving to everybody! Interesting news to report as I said before I haven't run it since I swapped the turbo. However yesterday when the injectors came in I decided to take it and power wash the engine so I can crack it open and swap those injectors. When I fired it up cold it didn't rattle or knock at all!!! now after it warmed up the knock eventually came back and was consistently there even when reved to me it sounds like valve train. I'm wondering if it could be a bad lifter or if I may have wiped a lobe on the cam? We will have to wait til Friday to find out Wife will kill me if I tear into it today boys!!! Go enjoy the Turkey!!!

 

They have solid lifters. You could pull the valve covers and check the clearance. It never hurts to adjust them anyway. A wiped cam lobe would cause a miss and most likely would be a quieter valve than the rest.

 

why not do a compression test while you have the injectors out...to rule out a galded piston

 

would a galled piston be quiet when cold and start to knock or tap when warmed up?

 

The engines that I have worked on with bad pistons the temperature didn't seem to make that much difference but as things warm up they change size and shape slightly so it is possible. A compression or leak down test might not show a piston problem because the rings could still be good and sealing to the wall properly. A piston rattle is caused by the bottom of the piston being loose in the cylinder by either being worn , cracked or collapsed. Another possibility is a worn wrist pin or bushings which also wouldn't show on the compression test.

 

like he said it might not show a problem but since your going to have them out i figured ya might want to try it and just see. the ones i have done with galded pistons did show up on the test they didnt show up dead but they did show to be lower then the other 5 which was enough to warrent pulling the head for inspection and found the cylinder walls all scratched up. i havnt seen one yet that had scratched up walls and still held perfect compression. i was thinking since it was ran low on oil long enough to kill the turbo that it could have also heated up the #6 piston enough to get it into the block...dosnt take alot since piston clearance is so close on these engines

 

the fact that you lost oil to the turbo tells you that you did indeed lose oil pressure, regardless of what your guage, or the guy that was driving it tells you. best case scenario is that a chunk of the vanes damaged an injector tip. I would cut open the oil filer and squeeze the oil out of a section of the filter medium and look for an excessive amount of metal. that will tell you if you have cam or piston skirt problems- or worse.....