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tips, technology, tools and techniques related to vehicle driveline components

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MGBV8
Carl Floyd
Kingsport, TN
(3232 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

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Re: Throwing in the towel (Sort of)
Posted by: MGBV8
Date: June 06, 2017 01:51PM

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


donkelly23
Don Kelly
Charleston, SC
(89 posts)

Registered:
07/21/2011 05:13PM

Main British Car:
1980 TR7 V8 Z28 FI ECM 4.0

Re: Throwing in the towel (Sort of)
Posted by: donkelly23
Date: June 06, 2017 02:02PM

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.


DiDueColpi
Fred Key
West coast - Canada
(1218 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

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Re: Throwing in the towel (Sort of)
Posted by: DiDueColpi
Date: June 06, 2017 02:20PM

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"


donkelly23
Don Kelly
Charleston, SC
(89 posts)

Registered:
07/21/2011 05:13PM

Main British Car:
1980 TR7 V8 Z28 FI ECM 4.0

Re: Throwing in the towel (Sort of)
Posted by: donkelly23
Date: June 06, 2017 02:44PM

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
Second PR Order0001 redacted.jpg


DiDueColpi
Fred Key
West coast - Canada
(1218 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Throwing in the towel (Sort of)
Posted by: DiDueColpi
Date: June 06, 2017 02:59PM

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


donkelly23
Don Kelly
Charleston, SC
(89 posts)

Registered:
07/21/2011 05:13PM

Main British Car:
1980 TR7 V8 Z28 FI ECM 4.0

Re: Throwing in the towel (Sort of)
Posted by: donkelly23
Date: June 06, 2017 03:04PM

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
Untitled.png


DiDueColpi
Fred Key
West coast - Canada
(1218 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Throwing in the towel (Sort of)
Posted by: DiDueColpi
Date: June 06, 2017 04:08PM

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.



donkelly23
Don Kelly
Charleston, SC
(89 posts)

Registered:
07/21/2011 05:13PM

Main British Car:
1980 TR7 V8 Z28 FI ECM 4.0

Re: Throwing in the towel (Sort of)
Posted by: donkelly23
Date: June 06, 2017 04:13PM

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?


DiDueColpi
Fred Key
West coast - Canada
(1218 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Throwing in the towel (Sort of)
Posted by: DiDueColpi
Date: June 06, 2017 04:43PM

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


donkelly23
Don Kelly
Charleston, SC
(89 posts)

Registered:
07/21/2011 05:13PM

Main British Car:
1980 TR7 V8 Z28 FI ECM 4.0

Re: Throwing in the towel (Sort of)
Posted by: donkelly23
Date: June 06, 2017 05:04PM

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


DiDueColpi
Fred Key
West coast - Canada
(1218 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Throwing in the towel (Sort of)
Posted by: DiDueColpi
Date: June 06, 2017 08:14PM

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


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5342 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

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Re: Throwing in the towel (Sort of)
Posted by: BlownMGB-V8
Date: June 06, 2017 10:55PM

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

Jim


donkelly23
Don Kelly
Charleston, SC
(89 posts)

Registered:
07/21/2011 05:13PM

Main British Car:
1980 TR7 V8 Z28 FI ECM 4.0

Re: Throwing in the towel (Sort of)
Posted by: donkelly23
Date: June 27, 2017 02:39PM

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


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5342 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Throwing in the towel (Sort of)
Posted by: BlownMGB-V8
Date: June 27, 2017 04:37PM

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
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