My ? is, how does the oil filter keep oil up in the valve train when the head and block both have holes called oil drain passages? The oil must return to the pan to be recirculated through out the engine by the pump. No?

 

yes, but it prevents backflow through the oil filter, which keeps the oil higher in the valve train for a more significant amount of time (days, at least). thus making sure your system is lubricated already upon start-up.



valve tick comes from lack of lubrication/improper lubrication, not high miles. keep the proper type of lube in it, and don't change the system after it's already got miles, and you'll most likely never have a tick.

 

I disagree with your thinking, but hey that's cool. I just don't understand while the head was off.........why not replace old lifters with new. They're dirt cheap.

 

50% right......high milage lifters can tap due to being worn out ...I know i just replaced mine for that reason.....a anti drain back is a good idea...thats why i use the motorcraft filters...however it wont hold oil in the lifter galley or the top of the head because they have direct return holes right into the oil pan....it does allow for faster oil pressure build up.

 

+1

 

The link didn't work for me. Yes I know that a 40 weight oil is thicker at operating temp than a 30 weight, but isn't synthetic oil thinner than conventional?

I got some Castrol 10w30 conventional tonight with the mopar filter. Also picked up some Marvel Mystery Oil and might put a small amount of it in with the 10w30 for good measure.

 

i think so...and i have changed ALOT!!!!!! of oil

 

it will keep fluid on the lifters (the highest wear point in the valve train) and on the cam for a longer period of time than with no anti-drainback. the end result is less non-lubricated contact between the cam and lifters on start-up, as well as between the block and lifters. end result, less wear and tear and less chance of having a knock.


lifters don't wear out when everything else was done right.

 

I just don't see how you can say lifters don't wear or wear out. They are a moving part with friction on their sides and both ends.........a cam lobe on one end and a push rod on the other. The camshaft and lifters are not submerged in oil so the filter doesn't keep it surrounded by oil when the engine is off.

 

If the vis numbers are the same (ie., 5W30) synthetic oil is the same vis as conventional........the statement that synthetic is thinner than conventional is just another oil myth spread around on the Internet.

Just tried the link again and it works for me.

http://www.supramania.com/aehaas/

 

they wear out, but a proper check valve WILL help keep oil up in/on, and near the lifters for a decent amount of time, preventing dry startups. no, it's not a guarantee, no, it doesn't hold oil up there for weeks or longer...but that is what it's designed to do.


there is normal wear, and abnormal wear. a lack of proper check valve in the oil filter, as well as improper oil itself, results in abnormal wear.