Stock Lifter Operation

[Mad_Trbo]

Ahhh the world of a pushrod engine, I am learning alot and I feel I have to excuse myself because I grew up on an OHC application so all of this stuff is kind of new to me.

Anyway, taking apart the top half and I am just making sure I have my basic principles inline as to how the valve train operates. Specifically lifters for a stock application.

First can we call these lifter types fixed?

Second is there any sort of pumping action in the actual lifter itself, and this causes oil to travel up the pushrod or is it simply delivered based on pressure generated by the oil pump?

3rd and finally is there any sort of mechanism within the lifter that can fail?

Thanks for everyones patience.

 

[MeanBuicks]

Perhaps this article can help answer some of your questions.

 

[Mad_Trbo]

Perhaps this article can help answer some of your questions.

Solid article that has cleared up a lot for me, now if I can just break away from thinking about this durn car to get some real work done. Or else all the research will be pointless I'll have no funds to support a rebuild.

Thanks again.

 

[Mad_Trbo]

Pushrod lengths on Hydraulic Roller lifters

So based on what I am seeing, when using a hydraulic roller lifter set up. In an effort to be as thorough as possible one would need to determine pushrod length for each individual rocker arm valve train component using one of those adjustable pushrod kits. Should one expect to see different lengths for each push rod or should they be the same for each rod if the motor is set up properly.

I know a lot of questions.

 

[JCotton]

So based on what I am seeing, when using a hydraulic roller lifter set up. In an effort to be as thorough as possible one would need to determine pushrod length for each individual rocker arm valve train component using one of those adjustable pushrod kits. Should one expect to see different lengths for each push rod or should they be the same for each rod if the motor is set up properly.

I know a lot of questions.

Actually, I would use roller rockers and do our adjusting on each pushrod with the adjustable rocker. You could use 1 adjustable pushrod to get the initial length.