Engine and Transmission Tech

Yeah. The push rod on my 215 is just over a 1/4".

OK, this is weird. Will need to call them.
The original invoice shows 5/16.
I had to send them back as they sent me the wrong length.
The new papers show 3/16.


Never mind they both show 3/16
That's the size of my 3.5 Factory TR8 used



Edited 1 time(s). Last edit at 06/06/2017 02:11PM by donkelly23.

Don't get the size of the cup confused with the diameter of the pushrod.
The rover pushrods neck down to 1/4" after the ball end.
And yep should have put my glasses on! the ball end is in fact 5/16ths"

There is no cup...just balls

This is even more confusing, I sent them them a rod from the old engine to match and they made the ball 5/16 on the new ones...
Though it doesn't say that
It says 3/16

The push rods have balls, the rockers and lifters have cups. All the same size. 5/16 for sure.

Was doing some checking on the web to see if I could find ball specification.

Real Steel in the UK has this
3/16 for the Rocker end
and 5/32 for the Lifter end
Interesting

They are quoting radius vs diameter 5/32" rad. is 5/16" dia.
5/16ths is the measurement from the pushrod that I have in my hand right now.

Christ...how they heck did I miss that
Then I will order 5/16 balls for the adjusting rod tool.
Length? Will 8"-9" work?

The factory rod is 8.00" exactly so you will want a little on either side of that.
Say 7.50'' to 8.50"

Mine measured out at 8.028 so ...7 1/2 - 8 1/2 it will be

I appreciate the patience and the help

Stay tuned for more questions (Probably) when I get the push rod and it isn't to hot

Hey, when push comes to shove...you just gotta grab it by the balls.
Otherwise you don't measure up!

Oh god, it must be scotchy scotch time.

Cheers

Don't stop now Fred, you're on a roll.

Jim

Adjustable PR has arrived and the question I have is how much tension should it have as I lengthen it.

Not a lot.
The hydraulic lifter has an internal piston and a spring. If you take one out you'll see that the cup is held in by a wire clip. Under that is the piston. You can push it down with a screwdriver, and depending on how much oil it has in it, it will probably go down easily for a bit and then stop. If it has no oil in it it will go down quite a ways, maybe as much as 3/8". If it is full it will hardly go down at all.

So the trick then is to get an accurate measurement against that light spring pressure and it isn't easy.

I solved the problem by using a spare lifter and substituting an adjustable bolt and nut for the piston and spring, adjusting it so that the cup was all the way up against the spring clip, then used that for measurement. But it has to be the same length as the lifters that you are using.

Jim