Originally Posted by UCNTRY
the only thing i can find in my oil is petrol but when i started it up earlier on one of the lifters was really noisy
Ok sounds like you need a new fuel pump after you get the lifter problem sorted.
Turning the motor over by hand with the rocker cover off see if you can establish which lifter is loose.
No wait a minute. Get a new fuel pump and replace the oil and filter. Then start it up and listen for the noisy lifter. If you get a long handled screw driver and put it on the inside edge of the head and listen with your ear against the end of the handle you will easlily pick which is the problem. Remove and inspect the lifter and pushrod for wear thru the hardening. Replace with new if necessary and adjust as per handbook