how to check lifters and cam
- Thread starter Teamvi
- Start date
Roller lifters seldom have problems at these rpms , and dont wear lobes because of roller . You can put a dowel indicator on valves to compare lift . Are you having problems other than gasket ?
horrible ticking/knocking, lets of metal in the oil filter, loose rocker way out of spec, feel like its missing on a cyl or it may even sound likes its on 7 cyl with a back knock/tick.
it will be blatantly obvious if its shot. if its just starting to go, you will soon hear/see it. when they go, its generally from a roller flat spotting or a cam that wasnt harden correctly and its wearing through.
if you want to be sure, pull the lifters and look down the bore at the cam lobe. anything else is speculation and crossing fingers on first fire up. thats assuming you really think there is a bad lifter/cam. its not likely but it does and has happen.
it will be blatantly obvious if its shot. if its just starting to go, you will soon hear/see it. when they go, its generally from a roller flat spotting or a cam that wasnt harden correctly and its wearing through.
if you want to be sure, pull the lifters and look down the bore at the cam lobe. anything else is speculation and crossing fingers on first fire up. thats assuming you really think there is a bad lifter/cam. its not likely but it does and has happen.
long as the head is off, its easy. use a magnet pen and pull it out. clean it up and put some fresh 15w40 back on it before dropping back in. doesnt have to soak, just a coating on it.
Did you check the ends of the push rod , did you put it on a flat surface to check for straightness ? And if you have the rare flat spot on roller you probably have more problems than just the lifter , unless you found it very soon after it happened . I hope you did!
A flat lifter will eat up at cam shaft in no time, diesels are usually good for not wearing out rollers due to their rpm range
Compared to a gasoline engine I had to replace a cam twice in two years on a hemi due to junky lifters and cam
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Compared to a gasoline engine I had to replace a cam twice in two years on a hemi due to junky lifters and cam
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