Hi All

Im new to the forum, and am about to change the DS4 pump on my truck..

The question i have is when removing the pump, after moving the motor around to TDC, can i just make a mark on the flange and bolt the new pump, into position, will the PCM then automatically make fine adjustments to the timing, or will it just retard the timing, also my truck has 85 000kms on it, would it be an idea to change the timing chain while im there, i dont know if it will have enough play in it to worry too much?

Thanks in advance