pushrod measuring

[Uncle Gump]

Not to measure but to adjust. You can start it up and loosen one at a time until it stops tapping and then a half turn. We have found it a lot cleaner doing it turning it over by hand. Remember to set the lash easy without pushing down the lifter cap.

WHAT???

 

[Rounder]

You have to adjust hydraulic lifters.

 

[Uncle Gump]

well what you typed makes absolutely no sense...

 

[Rounder]

Sorry, I thought we went from measuring push rods to adjusting push rods.
You take it from here Uncle Gump.

 

[Junglejoe]

I use to custom cut push rods for every engine I built. They were different then what you're dealing with but the principles are still the same.

I just have to ask... are you checking the geometry with the cam at 50% lift? If so and you get the 90 degree angle between the rocker centerline and the valve stem... add .050 and call it a day.

I tried that method and couldn't get it right. The way I measured is the way its been done a million times... you still add .050 according to the experts

 

[Uncle Gump]

I tried that method and couldn't get it right. The way I measured is the way its been done a million times... you still add .050 according to the experts

So you don't know the geometry at 50% lift?

I've never custom cut pushrods without knowing how things line up at 50% lift. If you're off... you will wear out the valve guides.

 

[Junglejoe]

So you don't know the geometry at 50% lift?

I've never custom cut pushrods without knowing how things line up at 50% lift. If you're off... you will wear out the valve guides.

Have no idea. I do know that with a solid lifter, the witness mark is dead center.. so I added .050 to the overall lift.

 

[Uncle Gump]

Okie dokie...

 

[Junglejoe]

Okie dokie...

Do you think that is a safe measurement?

 

[Uncle Gump]

It's never the way I did it... I think your geometry could still be off and your witness mark correct.

It would be easy enough to check... put a dial indicator on the valve... Install your adjustable push rod at the length you chose... roll the engine over to 50% of overall lift on the valve you're checking... check geometry.

 

[Junglejoe]

I'll give it a shot.. thanks.

 

[PetroleumJunkie412]

Measure base to tip from underneath, never from the top.

 

[Junglejoe]

Measure base to tip from underneath, never from the top.

Not sure qhat you mean by that ...