my camshaft is clicking me and a mac check it all out chain valvs everything on the top all is perfect perty positive its the cam went to articats part site they have a replacement camshaft for it why is that is it a recall i take it im not the only one that has this problem if they have to replace the camshaft any info would be great thanks

 

Some clicking is normal and is caused by either the valve tappets or time chain slap. Also your cam is steel and rides on a cast aluminum bearing surface. So if it does not get the proper lubrication due to low oil, wrong type of oil, etc the aluminum bearing surface on the head gets tatered easily. I know this first hand from a lack of oil on my 400 due to water in the oil freezing in the oil cooler and restricting the oil flow. Once the engine restarted it sounded like a one cylinder diesel!

It cost about $1200 in parts, rebuilt the entire top end, and took a couple of weeks of evenings and weekends to complete. Runs fine now and I have roughly 15,000mi on it.

On a side note if you get the valves too tight they make noise and if they are too loose they make noise adjusted just right they make only a slight tapping noise. If your TRV is water cooled there was an issue with the water pump having a restriction in it an not functioning correctly. I know the 500TRV's are water cooled but I am not sure about the 400's?

SJ

 

its not a constant click and it only does it at low idle oil is new chain is tight everything els is good my main ? is why does articat have a replacement cam was there a problem with the old ones thanks