what i did with mine was remove the oil feed to the turbo and pump fresh oil into the engine until i could see it seeping out the lifters looking in the oil filler hole. I then fired it up for the first time and had no ticking and good oil pressure on a brand new engine.

 

I saw that sticky and I don't dispute it. I, for one, don't like running an engine up with lifter tap, and as I said earlier, everybody has their own way of doing things, and my way is to prime the lifters with oil before re-installing them. I don't get lifter tap and I have done enough 4G63s and similar engines to be comfortable to recommend priming them.

As for pressure, anytime an engine is turned, you will have pressure during the duration of the turn, granted, you probably won't even detect it with an ordinary oil pressure gauge, but physics is physics, and the 4G63 isn't an exception. Regarding previously operated engines, there's already oil in various passages from previous runs, and if there is enough oil to move, it will move and displace, whether by turning by hand or turning over with the starter. I will say that you won't pick up oil from the oil pan via the hand turn method, and if this is what you are implying, then ok, you are correct. If you are saying to me that oil will not move when turning over the engine via the starter, then show me. If I am not mistaken, system priming is an integral step in combustion engines in the pre-ignition mode with full system pressurization after ignition.

I'm a mechanical engineer.

 

i think the point is, you do not have to or need to prime the lifters for the 4g63. that would still require you to remove the timing belt to do so..... its required on some, like a sb350 but it is very simple to do so.

 

As per the manufacturer, yes, that is correct and I am not disputing it, but for me, I learned my lessons from dealing with the SR20DET, which is notorious for lifter tap if they aren't purged and pre-primed whenever they are are removed. Those lessons I carry over to the 4G63, and so far, I'm good to go.

 

i can understand that, and i guess if it works for you, thats all that matters! ive just heard people having problems from priming them before installation as well...

 

you know, once the cam is installed, the lifters are going to compress in various ways, and if they are primed, they will release oil accordingly and there shouldn't be any tapping if the oil pressurization sequence is quick enough to push oil into the galleys and deadspace in the cylinder head. But anyway, as you said, whatever works.

 

From the Evo 6 Workshop Manual:

 

I've always gone by the workshop manual and cleaned and primed them with diesel.

 

Bleeding and priming with diesel is the way to go. That is what I do now. I used to leave them empty and pump them up with idle revving. I never liked that.

The lifters are absolutely silent at start up, and you clean the lifters in the process when you diesel prime. It takes some practice to get them to fill 100%.