Hi guys my first post on this site, I have an 06 stx d40 with about 135000ks on it and for the past 10 to 20000 kms the rattle at the front of the engine has gotten really loud from the moment you start it till the moment you stop and is a little embarrassing as it loud ,I service my car anywhere between 5-10000 using cat engine oil ,and has not missed a beat and does everything you ask of it ,now I live in a small inland town and took it to the mechanic and he got a price from mackay Nissan for the timing chains and parts and with labour was quoted nearly 5 grand to replace everything , now I finally had a day off and removed the front cover and the secondry chain was all nice and tight and the tensioner showing adout 4-5 mm which should still be ok, now the primary chain was very loose so I said bugger its the back one, then I turned the engine over with a ratchet and then the rear chain went tight and the front one become sloppy and the tensioner went inside so kept turning it over then the front tensioner popped out again and chain went tight again but the back one went sloppy , so I know the simple thing would be to replace everything but I need to look at $$$ and maybe its both tensioners that may need replacing , has anyone else seen this with there timing chain problems, need some direction ,thanks