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Hello All, it's been awhile since I've logged in, just purchased a 95 D1 3.9L with 5 spd. So here are my questions. When the engine is warm, I can hear what sounds like a rod knock, the noise goes away above 1500 RPM. My attempts at diagnosing the cause have been to remove the individual spark plug leads while the engine is warm and idling hoping to identify which cylinder had the knock, this had no effect on the noise. Next using an engine stethoscope around the individual cylinders did not narrow the location of the noise until I put the stethoscope at the base of the distributor, there I could hear the knock. I've pulled the oil pan / sump to check the oil pick up tube to make sure it wasn't gummed up, it's clear (motor has 120K miles). It had been suggested that possibly the camshaft is bumping forward and the camshaft wear button could be worn. So, I've called around trying to find the camshaft button (part #CAM1000), nobody has one, checked Atlantic British, Rovers North and two Rover dealers. Same story, the part has been discontinued and not available. Today, while pulling down the front of the motor, two things I noticed. One the existing bolt located on the front of the camshaft is just a regular bolt, it doesn't have the nylon button on the end of the bolt (no indicator there ever was one on the bolt). Second, I noticed the timing chain was really sloppy. What are your thoughts about the possible cause of the knock noise and if it's camshaft end play, any idea on where to find the camshaft bolt with the nylon button. Thank you, Karl
Rod knock noise?
